Q. No.The famous aphorism ‘omniscellula-e-cellula’ was added to the cell theory in 1855 by
1.
Matthias Shcleiden
2.
Theodore Schwann
3.
J. B. S. Haldane
4.
Rudolph Virchow
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Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statement is correct with respect to movements of lipids and proteins from one lipid monolayer to the other (described as flip flop movement) ?
1. While proteins can flip-flop, lipids cannot
2. Neither lipids nor proteins can flip-flop
3. Both lipids and proteins can flip-flop
4. While lipids can rarely flip-flop, proteins cannot
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| I. | A | Sister chromatids |
| II. | B | Q arm of the chromosome |
| III. | C | Centromere |
| IV. | D | P arm of the chromosome |
| 1. | Only I and II | 2. | Only II and IV |
| 3. | Only I and III | 4. | Only I |
| 1. Type A | 2. Type B |
| 3. Type C | 4. Type D |
Identify the correct statements regarding the structures shown in the given diagram.
I: A is the transverse section of the axoneme of a flagellum showing 9 + 2 arrangement of the microtubules.
II: B is the basal body that has an ultrastructure identical to centriole.
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: A is the site of the location of the enzymes for the biosynthetic phase of photosynthesis in higher plants.
II: B is the site for the location of the photosynthetic pigments organized into photosystems.
III: C lacks PS II as well as NADP reductase enzyme.
| 1. Only I and II | 2. Only III |
| 3. Only II | 4. I, II, and III |
| A | Inner membrane | Site of location of electron transport chain |
| B | Outer membrane | Forms the continuous limiting boundary of the organelle |
| C | Cristae | Increase the surface area |
| D | Matrix | Site for Kreb’s cycle |
2. Only A, B, and D
3. Only B, C, and D
4. A, B, C, and D
I: A is the cis face and B is the trans face.
II: The two faces are entirely different but inter-connected.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Study the given diagram and select the correct statements regarding the parts labels I, II and III.
A: I are ribosomes and found only in eukaryotic cells.
B: II is Rough Endoplasmic Reticulum frequently observed in cells actively involved in protein synthesis and secretion.
C: III is Smooth Endoplasmic Reticulum which is a major site for synthesis of lipids.
| 1. Only A and B | 2. Only A and C |
| 3. Only B and C | 4. A, B and C |
I: A is a major component of animal plasma membranes and it regulates the fluidity of the overall membrane.
II: B are integral proteins and C is an extrinsic protein.
III: D is the hydrophobic head of the phospholipid and E is its hydrophilic tail.
IV: F is a carbohydrate found only on the outer surface of the membrane.
| 1. Only I, II, and III | 2. Only I, II, and IV |
| 3. Only II, III, and IV | 4. I, II, III and IV |
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