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Cell Biology MCQ question and answer with solution | Biology Gk MCQs

Learn Cell Biology MCQ Questions and answers with easy and logical explanations in Biology Gk . Cell Biology MCQ question provides all type of technical mcq questions which is important for SSC-CGL, UPPSC, NDA, CDS and all govt examinations Page-10 section-1

Each section contains 100 MCQs on Cell Biology .
91
Consider the following statements regarding supernumerary chromosomes and choose the correct answer:
1. They are not homologous with any of the normal chromosomes
2. They form synapses among themselves
3. They are generally smaller than normal chromosomes
4. They are found more commonly in plants than in animals
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
92
The scientific study of a cell is called
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
93
When chromatin is in a partly extended state, the diameter of the beads is reduced to about 70A which are called
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Answer & Solution
Answer: Option D
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94
Select the correct statement for nucleolus.
Discuss
Answer & Solution
Answer: Option B
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95
According to the Singer-Nicolson fluid mosaic model, the pores may not be stable, but may be constantly appearing and disappearing. This concept is known as
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
96
The cell walls of plants are made up of fibrils which predominantly contain
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Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
97
Consider the following statements and choose the correct answer:
1. Autophagy is the digestion of endogenous material
2. Heterophagy is the intake of exogenous material into the cell and the subsequent breakdown of this material by enzymes
3. Both pinocytosis and phagocytosis require energy
4. The bulk intake of exogenous material is called exocytosis
Discuss
Answer & Solution
Answer: Option B
Solution:
First, let's define some terms:
Autophagy and Heterophagy are types of cellular digestion.
Pinocytosis and Phagocytosis are types of endocytosis, meaning they are ways to bring materials into the cell.
Exocytosis is how cells release materials.
Now let's look at each statement:
1. "Autophagy is the digestion of endogenous material": This is TRUE. "Auto" means "self," so autophagy is like the cell cleaning up its own damaged or unnecessary parts.
2. "Heterophagy is the intake of exogenous material into the cell and the subsequent breakdown of this material by enzymes": This is also TRUE. "Hetero" means "other," so heterophagy is when the cell ingests and digests material from outside itself.
3. "Both pinocytosis and phagocytosis require energy": This is TRUE. These processes involve the cell membrane changing shape to engulf materials, and that requires energy (in the form of ATP).
4. "The bulk intake of exogenous material is called exocytosis": This is FALSE. Exocytosis is the process of releasing material from the cell, not taking it in. Intake is endocytosis.
So, statements 1, 2, and 3 are correct, but statement 4 is wrong.
Therefore, the correct answer is Option B: Only 1, 2 and 3 are correct.
98
Which of the following cell organelles is found in a cell which is very active in protein synthesis?
Discuss
Answer & Solution
Answer: Option D
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99
Which of the following are fully capable of converting pyruvic acid to carbon dioxide and water?
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Answer & Solution
Answer: Option C
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100
Which one of the following organelles takes part in the formation of acrosome in human sperms?
Discuss
Answer & Solution
Answer: Option B
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