CELL THE UNIT OF LIFE|100 MCQS BEST FOR NEET PRACTICE

 

CELL THE UNIT OF LIFE|100 MCQS WHICH WILL HELP YOU TO CRACK NEET EXAMINATION.

 

CELL THE UNIT OF LIFE

here are 100 multiple choice questions on the topic of cells, along with their answers and explanations:

 

1. What is the basic structural and functional unit of all living organisms?
A) Tissue
B) Cell
C) Organ
D) Organism
*Answer: B) Cell*
Explanation: Cells are the basic building blocks of life. They are responsible for carrying out all the functions necessary for an organism to survive.

2. Who is credited with the discovery of the cell in 1665?
A) Robert Hooke
B) Antoine van Leeuwenhoek
C) Louis Pasteur
D) Gregor Mendel
*Answer: A) Robert Hooke*
Explanation: Robert Hooke observed cells in cork under a microscope and coined the term “cell” in 1665.

3. Which of the following is not a type of cell?
A) Prokaryotic
B) Eukaryotic
C) Plant
D) Neuronal
*Answer: D) Neuronal*
Explanation: Neuronal refers to cells of the nervous system, but it is not a distinct category of cell structure like prokaryotic and eukaryotic cells.

4. What is the main function of the cell membrane?
A) To provide structural support
B) To regulate the passage of materials into and out of the cell
C) To synthesize proteins
D) To store genetic information
*Answer: B) To regulate the passage of materials into and out of the cell*
Explanation: The cell membrane controls the movement of substances into and out of the cell, maintaining homeostasis.

5. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

6. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

7. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

8. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

9. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

10. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

11. Which organelle is responsible for detoxifying harmful substances in the cell?
A) Peroxisome
B) Golgi apparatus
C) Endoplasmic reticulum
D) Nucleus
*Answer: A) Peroxisome*
Explanation: Peroxisomes contain enzymes that detoxify harmful substances, such as hydrogen peroxide, in the cell.

12. What is the primary function of the smooth endoplasmic reticulum (SER)?
A) Protein synthesis
B) Lipid synthesis
C) ATP production
D) Intracellular digestion
*Answer: B) Lipid synthesis*
Explanation: The smooth endoplasmic reticulum (SER) is involved in lipid synthesis, metabolism of carbohydrates, and detoxification of drugs and poisons.

13. Which organelle is responsible for sorting, modifying, and packaging proteins for secretion?
A) Nucleus
B) Golgi apparatus
C) Lysosome
D) Ribosome
*Answer: B) Golgi apparatus*
Explanation: The Golgi apparatus processes and packages proteins synthesized in the endoplasmic reticulum (ER) for secretion or delivery to other organelles.

14. Which of the following structures is involved in cell division in animal cells but not in plant cells?
A) Centriole
B) Cell wall
C) Chloroplast
D) Central vacuole
*Answer: A) Centriole*
Explanation: Centrioles are involved in organizing the spindle fibers during cell division in animal cells but are absent in most plant cells.

15. Which organelle is responsible for maintaining the cell’s shape, anchoring organelles, and facilitating cell movement?
A) Cytoskeleton
B) Nucleus
C) Golgi apparatus
D) Peroxisome
*Answer: A) Cytoskeleton*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, anchors organelles, and facilitates cell movement through structures like cilia and flagella.

16. Which of the following is not a component of the cytoskeleton?
A) Microfilaments
B) Microtubules
C) Intermediate filaments
D) Ribosomes
*Answer: D) Ribosomes*
Explanation: Ribosomes are not part of the cytoskeleton. They are involved in protein synthesis and are not structural components like microfilaments, microtubules, and intermediate filaments.

17. What is the function of the nucleus in the cell?
A) Energy production
B) Protein synthesis
C) Storage of genetic information
D) Intracellular digestion
*Answer: C) Storage of genetic information*
Explanation: The nucleus contains the cell’s genetic material (DNA) and is responsible for controlling gene expression and cell activities.

18. Which of the following organelles is responsible for maintaining water balance in plant cells?
A) Nucleus
B) Lysosome
C) Central vacuole
D) Peroxisome
*Answer: C) Central vacuole*
Explanation: The central vacuole in plant cells stores water, maintains turgor pressure, and stores various ions and nutrients.

19. Which organelle is responsible for photosynthesis in plant cells?
A) Chloroplast
B) Mitochondria
C) Golgi apparatus
D) Endoplasmic reticulum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

20. Which organelle contains the genetic material and controls the activities of the cell?
A) Nucleus
B) Ribosome
C) Golgi apparatus
D) Endoplasmic reticulum
*Answer: A) Nucleus*
Explanation: The nucleus contains the cell’s DNA and is the control center of the cell, regulating gene expression and cell activities.

21. Which of the following is not a characteristic of prokaryotic cells?
A) Presence of membrane-bound organelles
B) Lack of a true nucleus
C) Presence of ribosomes
D) Small size
*Answer: A) Presence of membrane-bound organelles*
Explanation: Prokaryotic cells lack membrane-bound organelles such as a nucleus, mitochondria, or endoplasmic reticulum.

22. What is the function of the cell wall in plant cells?
A) Regulating the passage of materials into and out of the cell
B) Providing structural support and protection
C) Synthesizing proteins
D) Storing genetic information
*Answer: B) Providing structural support and protection*
Explanation: The cell wall in plant cells provides structural support, protection, and helps maintain cell shape.

23. Which of the following organelles contains enzymes for breaking down cellular waste and debris?
A) Golgi apparatus
B) Mitochondria
C) Lysosome
D) Ribosome
*Answer: C) Lysosome*
Explanation: Lysosomes contain digestive enzymes that break down cellular waste, debris, and foreign invaders through intracellular digestion.

24. Which organelle is responsible for the synthesis of proteins that are exported from the cell?
A) Ribosome
B) Endoplasmic reticulum
C) Golgi apparatus
D) Lysosome
*Answer: B) Endoplasmic reticulum*
Explanation: The endoplasmic reticulum (ER) is involved in protein synthesis and modification, particularly for proteins destined for export or insertion into membranes.

25. Which of the following organelles is responsible for detoxifying drugs and poisons in the cell?
A) Lysosome
B) Golgi apparatus
C) Peroxisome
D) Mitochondria
*Answer: C) Peroxisome*
Explanation: Peroxisomes contain enzymes that detoxify harmful substances, such as drugs and poisons, in the cell.

26. What is the function of the flagella in cells?
A) Synthesizing proteins
B) Facilitating cell movement
C) Digesting cellular waste
D) Storing genetic information
*Answer: B) Facilitating cell movement*
Explanation: Flagella are long, whip-like structures that protrude from the cell and are involved in cell movement.

27. Which of the following organelles is responsible for producing and assembling ribosomal subunits?
A) Nucleus
B) Golgi apparatus
C) Endoplasmic reticulum
D) Nucleolus
*Answer: D) Nucleolus*
Explanation: The nucleolus is a structure within the nucleus where ribosomal RNA (rRNA) is synthesized and ribosomal subunits are assembled.

28. Which of the following is not a function of the nucleolus?
A) Synthesizing ribosomal RNA (rRNA)
B) Assembling ribosomal subunits
C) Storing genetic information
D) Producing ribosomes
*Answer: C) Storing genetic information*
Explanation: While the nucleolus is involved in synthesizing ribosomal RNA (rRNA) and assembling ribosomal subunits, it does not store genetic information. The nucleus stores genetic material.

29. Which organelle is responsible for the breakdown of fatty acids and hydrogen peroxide in the cell?
A) Peroxisome
B) Golgi apparatus
C) Lysosome
D) Endoplasmic reticulum
*Answer: A) Peroxisome*
Explanation: Peroxisomes contain enzymes that break down fatty acids and hydrogen peroxide, detoxifying harmful substances in the cell.

30. What is the function of the cilia in cells?
A) Protein synthesis
B) Facilitating cell movement
C) Digesting cellular waste
D) Storing genetic information
*Answer: B) Facilitating cell movement*
Explanation: Cilia are hair-like structures that protrude from the cell surface and are involved in cell movement, either by propelling the cell itself or by moving substances past the cell.

31. Which of the following organelles is responsible for the synthesis of lipids and steroids?
A) Golgi apparatus
B) Nucleus
C) Endoplasmic reticulum
D) Lysosome
*Answer: C) Endoplasmic reticulum*
Explanation: The endoplasmic reticulum (ER), particularly the smooth ER, is involved in lipid synthesis, including the synthesis of lipids and steroids.

32. What is the function of the mitochondria in the cell?
A) Protein synthesis
B) ATP production
C) Intracellular digestion
D) Synthesis of lipids
*Answer: B) ATP production*
Explanation: Mitochondria are the powerhouse of the cell, responsible for producing ATP through cellular respiration, which is the primary energy currency of the cell.

33. Which of the following is a characteristic feature of eukaryotic cells?
A) Lack of membrane-bound organelles
B) Presence of a true nucleus
C) Small size
D) Presence of a cell wall
*Answer: B) Presence of a true nucleus*
Explanation: Eukaryotic cells have a true nucleus enclosed within a membrane, unlike prokaryotic cells which lack a membrane-bound nucleus.

34. What is the function of the central vacuole in plant cells?
A) ATP production
B) Intracellular digestion
C) Storage of water and nutrients
D) Synthesis of proteins
*Answer: C) Storage of water and nutrients*
Explanation: The central vacuole in plant cells stores water, ions, pigments, and other nutrients, contributing to cell turgor pressure and maintaining the cell’s shape.

35. Which organelle is responsible for synthesizing and modifying carbohydrates in the cell?
A) Ribosome
B) Golgi apparatus
C) Endoplasmic reticulum
D) Nucleus
*Answer: C) Endoplasmic reticulum*
Explanation: The endoplasmic reticulum (ER) is involved in the synthesis and modification of carbohydrates, proteins, and lipids in the cell.

36. Which of the following is a characteristic feature of prokaryotic cells?
A) Presence of membrane-bound organelles
B) Lack of a true nucleus
C) Large size
D) Presence of a nuclear membrane
*Answer: B) Lack of a true nucleus*
Explanation: Prokaryotic cells lack a true nucleus and other membrane-bound organelles, with their genetic material typically found in a nucleoid region.

37. What is the function of the rough endoplasmic reticulum (RER)?
A) ATP production
B) Intracellular digestion
C) Protein synthesis
D) Synthesis of lipids
*Answer: C) Protein synthesis*
Explanation: The rough endoplasmic reticulum (RER) is studded with ribosomes and is involved in protein synthesis and modification.

38. Which of the following is not a component of the endomembrane system?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Nucleus
D) Lysosome
*Answer: C) Nucleus*
Explanation: While the nucleus is involved in regulating gene expression and contains genetic material, it is not considered part of the endomembrane system.

39. What is the function of the nuclear envelope?
A) Regulating the passage of materials into and out of the nucleus
B) Synthesizing proteins
C) Producing energy
D) Storing genetic information
*Answer: A) Regulating the passage of materials into and out of the nucleus*
Explanation: The nuclear envelope, composed of two lipid bilayers, regulates the passage of materials into and out of the nucleus through nuclear pores.

40. Which organelle is responsible for packaging and secreting proteins in vesicles?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Nucleus
D) Lysosome
*Answer: A) Golgi apparatus*
Explanation: The Golgi apparatus receives, modifies, sorts, and packages proteins synthesized in the endoplasmic reticulum into vesicles for secretion or delivery to other organelles.

41. Which organelle is responsible for detoxifying drugs and alcohol in liver cells?
A) Peroxisome
B) Golgi apparatus
C) Lysosome
D) Endoplasmic reticulum
*Answer: A) Peroxisome*
Explanation: Peroxisomes contain enzymes that detoxify harmful substances, including drugs and alcohol, in liver cells and other tissues.

42. Which of the following organelles is involved in cell division?
A) Nucleus
B) Golgi apparatus
C) Mitochondria
D) Centriole
*Answer: D) Centriole*
Explanation: Centrioles are involved in organizing the spindle fibers during cell division, aiding in the separation of chromosomes.

43. Which organelle is responsible for maintaining calcium ion levels in muscle cells?
A) Peroxisome
B) Golgi apparatus
C) Lysosome
D) Sarcoplasmic reticulum
*Answer: D) Sarcoplasmic reticulum*
Explanation: The sarcoplasmic reticulum is a specialized type of smooth endoplasmic reticulum found in muscle cells and is responsible for storing and releasing calcium ions required for muscle contraction.

44. What is the function of the cell membrane?
A) To provide structural support
B) To synthesize proteins
C) To regulate the passage of materials into and out of the cell
D) To store genetic information
*Answer: C) To regulate the passage of materials into and out of the cell*
Explanation: The cell membrane controls the movement of substances into and out of the cell, maintaining homeostasis and allowing for communication with the external environment.

45. Which organelle contains enzymes necessary for breaking down carbohydrates, proteins, and lipids in the cell?
A) Peroxisome
B) Golgi apparatus
C) Lysosome
D) Ribosome
*Answer: C) Lysosome*
Explanation: Lysosomes contain hydrolytic enzymes that break down carbohydrates, proteins, lipids, and other cellular macromolecules through intracellular digestion.

46. What is the primary function of ribosomes?
A) Energy production
B) Protein synthesis
C) Intracellular digestion
D) Synthesis of lipids
*Answer: B) Protein synthesis*
Explanation: Ribosomes are responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

47. Which organelle is responsible for producing and assembling ribosomal subunits?
A) Nucleus
B) Golgi apparatus
C) Endoplasmic reticulum
D) Nucleolus
*Answer: D) Nucleolus*
Explanation: The nucleolus is a structure within the nucleus where ribosomal RNA (rRNA) is synthesized and ribosomal subunits are assembled.

48. Which organelle is responsible for maintaining the cell’s shape, anchoring organelles, and facilitating cell movement?
A) Cytoskeleton
B) Nucleus
C) Golgi apparatus
D) Peroxisome
*Answer: A) Cytoskeleton*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, anchors organelles, and facilitates cell movement through structures like cilia and flagella.

49. What is the function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) All of the above
*Answer: D) All of the above*
Explanation: The cytoskeleton provides structural support, facilitates cell movement, and aids in intracellular transport of substances within the cell.

50. Which of the following is not a component of the cytoskeleton?
A) Microfilaments
B) Microtubules
C) Intermediate filaments
D) Ribosomes
*Answer: D) Ribosomes*
Explanation: Ribosomes are not part of the cytoskeleton. They are involved in protein synthesis and are not structural components like microfilaments, microtubules, and intermediate filaments.

51. What is the function of the nucleus in the cell?
A) Energy production
B) Protein synthesis
C) Storage of genetic information
D) Intracellular digestion
*Answer: C) Storage of genetic information*
Explanation: The nucleus contains the cell’s genetic material (DNA) and is responsible for controlling gene expression and cell activities.

52. Which of the following organelles is responsible for maintaining water balance in plant cells?
A)Nucleus
B) Lysosome
C) Central vacuole
D) Peroxisome
*Answer: C) Central vacuole*
Explanation: The central vacuole in plant cells stores water, maintains turgor pressure, and stores various ions and nutrients.

53. Which organelle is responsible for photosynthesis in plant cells?
A) Chloroplast
B) Mitochondria
C) Golgi apparatus
D) Endoplasmic reticulum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

54. Which organelle contains the genetic material and controls the activities of the cell?
A) Nucleus
B) Ribosome
C) Golgi apparatus
D) Endoplasmic reticulum
*Answer: A) Nucleus*
Explanation: The nucleus contains the cell’s DNA and is the control center of the cell, regulating gene expression and cell activities.

55. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

56. Which organelle is responsible for detoxifying harmful substances in the cell?
A) Peroxisome
B) Golgi apparatus
C) Endoplasmic reticulum
D) Nucleus
*Answer: A) Peroxisome*
Explanation: Peroxisomes contain enzymes that detoxify harmful substances, such as hydrogen peroxide, in the cell.

57. What is the primary function of the smooth endoplasmic reticulum (SER)?
A) Protein synthesis
B) Lipid synthesis
C) ATP production
D) Intracellular digestion
*Answer: B) Lipid synthesis*
Explanation: The smooth endoplasmic reticulum (SER) is involved in lipid synthesis, metabolism of carbohydrates, and detoxification of drugs and poisons.

58. Which organelle is responsible for sorting, modifying, and packaging proteins for secretion?
A) Nucleus
B) Golgi apparatus
C) Lysosome
D) Ribosome
*Answer: B) Golgi apparatus*
Explanation: The Golgi apparatus processes and packages proteins synthesized in the endoplasmic reticulum (ER) for secretion or delivery to other organelles.

59. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

60. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

61. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

62. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

63. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

64. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

65. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

66. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

67. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

68. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

69. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

70. Which organelle is responsible for ATP production through cellular respiration?

A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

71. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

72. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

73. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

74. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

75. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

76. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

77. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

78. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

79. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

80. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

81. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

82. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

83. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

84. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

85. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

86. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

87. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

88. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

89. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

90. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

91. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

92. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

93. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

94. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration.

95. Which of the following is found exclusively in plant cells and not in animal cells?
A) Chloroplast
B) Lysosome
C) Centriole
D) Flagellum
*Answer: A) Chloroplast*
Explanation: Chloroplasts are organelles found in plant cells and are responsible for photosynthesis, converting light energy into chemical energy.

96. Which organelle contains enzymes necessary for intracellular digestion?
A) Nucleus
B) Lysosome
C) Ribosome
D) Endoplasmic reticulum
*Answer: B) Lysosome*
Explanation: Lysosomes are membrane-bound organelles containing enzymes that break down waste materials and cellular debris through intracellular digestion.

97. What is the function of ribosomes in the cell?
A) Synthesizing lipids
B) Producing energy
C) Synthesizing proteins
D) Storing genetic information
*Answer: C) Synthesizing proteins*
Explanation: Ribosomes are the cellular structures responsible for protein synthesis, where amino acids are assembled into polypeptide chains according to mRNA instructions.

98. Which of the following is not a function of the cytoskeleton?
A) Providing structural support
B) Facilitating cell movement
C) Transporting substances within the cell
D) Synthesizing proteins
*Answer: D) Synthesizing proteins*
Explanation: The cytoskeleton is a network of protein filaments that provides structural support, facilitates cell movement, and aids in intracellular transport, but it is not directly involved in protein synthesis.

99. Which type of cell lacks a true nucleus?
A) Prokaryotic
B) Eukaryotic
C) Animal
D) Plant
*Answer: A) Prokaryotic*
Explanation: Prokaryotic cells, such as bacteria, lack a membrane-bound nucleus. Instead, their genetic material is located in the nucleoid region.

100. Which organelle is responsible for ATP production through cellular respiration?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Mitochondria
D) Chloroplast
*Answer: C) Mitochondria*
Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s energy currency, through cellular respiration

also read:-https:https://nalandascholars.com/structural-organisation-in-animals-mcqs/