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Q. No.The inner membrane of the mitochondria has infoldings called cristae. What is the primary function of these cristae?
1.
They contain enzymes for the citric acid cycle.
2.
They provide a large surface area for ATP production.
3.
They house the genetic material (mitochondrial DNA).
4.
They regulate the passage of molecules into and out of the mitochondria.
Subtopic: Mitochondria |
88%
From NCERT
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Bacterial flagella differ from eukaryotic flagella in that they:
| 1. | Are primarily used for sensory purposes |
| 2. | Are composed of microtubules |
| 3. | Are enclosed in the cell wall |
| 4. | Rotate rather than whip |
Subtopic: Cilia & Flagella |
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Match the following cell types with their average sizes given in the NCERT diagram:
1. A-iii, B-iv, C-ii, D-i
2. A-ii, B-i, C-iv, D-iii
3. A-iii, B-i, C-ii, D-iv
4. A-iv, B-iii, C-i, D-ii
| Column I | Column II | ||
| A | Human Red Blood Cell | i | 0.1-0.5 µm |
| B | Bacteria | ii | 20-30 µm |
| C | Yeast | iii | 7-8 µm |
| D | Virus | iv | 1-2 µm |
1. A-iii, B-iv, C-ii, D-i
2. A-ii, B-i, C-iv, D-iii
3. A-iii, B-i, C-ii, D-iv
4. A-iv, B-iii, C-i, D-ii
Subtopic: Cell Organisation |
93%
From NCERT
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Which of the following is a key difference between prokaryotic and eukaryotic cells?
| 1. | Only eukaryotic cells contain a cell membrane. |
| 2. | Prokaryotic cells have membrane-bound organelles, while eukaryotic cells do not. |
| 3. | Eukaryotic cells have a well-defined nucleus, while prokaryotic cells do not. |
| 4. | Prokaryotic cells are generally larger than eukaryotic cells. |
Subtopic: Cell Organisation |
97%
From NCERT
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Type of plastids that have fat soluble carotenoid pigments, like carotene xanthophylls, are present in:
| 1. | Chromoplasts | 2. | Amyloplasts |
| 3. | Aleuroplasts | 4. | Elaioplasts |
Subtopic: Plastids |
69%
From NCERT
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All prokaryotic cells:
1. have a cell wall.
2. can fix atmospheric nitrogen.
3. lack a nuclear membrane.
4. can survive in the absence of oxygen.
1. have a cell wall.
2. can fix atmospheric nitrogen.
3. lack a nuclear membrane.
4. can survive in the absence of oxygen.
Subtopic: Cell Organisation |
92%
From NCERT
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Which component of the cell envelope of a bacterial cell provides structural support to prevent the bacterium from bursting or collapsing?
1. Slime layer of glycocalyx
2. Capsule of glycocalyx
3. Cell wall
4. Cell membrane
1. Slime layer of glycocalyx
2. Capsule of glycocalyx
3. Cell wall
4. Cell membrane
Subtopic: Details of Prokaryotic Cell Structure |
73%
From NCERT
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Identify the incorrect statement regarding eukaryotic cells:
| 1. | Cell wall is made up of peptidoglycans |
| 2. | 80S type of ribosomes are present in the cytoplasm |
| 3. | Mitochondria contain circular DNA |
| 4. | Membrane bound organelles are present |
Subtopic: Eukaryotic Cell Orgenelle |
84%
From NCERT
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The fluid mosaic model for the plasma membrane was proposed by:
1. H. Davson and J. Danielli
2. Schleiden and Schwann
3. Singer and Nicolson
4. Robert Brown and Robert Hooke
1. H. Davson and J. Danielli
2. Schleiden and Schwann
3. Singer and Nicolson
4. Robert Brown and Robert Hooke
Subtopic: Evidence for Fluidic Nature of Membrane |
94%
From NCERT
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Consider the given two statements:
I: No animal cell has cell wall.
II: No animal cell has centrosome.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: No animal cell has cell wall.
II: No animal cell has centrosome.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Eukaryotic Cell Orgenelle |
74%
From NCERT
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