When a potassium ion (K+) moves from the soil into the vacuole of a cell on the surface of a root, it must pass through several cellular structures. Which of the following correctly describes the order in which these structures will be encountered by the ion?
1.
plasma membrane → primary cell wall → cytoplasm → vacuole
2.
secondary cell wall → plasma membrane → primary cell wall → cytoplasm → vacuole
3.
primary cell wall → plasma membrane → cytoplasm → vacuole
4.
primary cell wall → plasma membrane → lysosome → cytoplasm → vacuole
Subtopic: Vacuole |
68%
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Which of the following is a characteristic feature of a carrier protein in a plasma membrane?
1. It is a peripheral membrane protein.
2. It exhibits a specificity for a particular type of molecule.
3. It requires the expenditure of cellular energy to function.
4. It works against diffusion
1. It is a peripheral membrane protein.
2. It exhibits a specificity for a particular type of molecule.
3. It requires the expenditure of cellular energy to function.
4. It works against diffusion
Subtopic: Cell Membrane |
52%
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In the following question, a statement of assertion (A) is followed by a statement of reason (R).
| Assertion (A) : | Both the solute and solvent can pass through a semipermeable membrane. |
| Reason (R) : | A semipermeable membrane is always living. |
| 1. | If both (A) & (R) are true and the (R) is the correct explanation of the assertion |
| 2. | If both (A) & (R) are true and the (R) is not the correct explanation of the assertion |
| 3. | If (A) is a true statement but (R) is false |
| 4. | If both (A) and (R) are false statements. |
Subtopic: Cell Membrane |
From NCERT
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Which organelle often takes up much of the volume of a plant cell?
1. lysosome
2. vacuole
3. mitochondrion
4. Golgi apparatus
1. lysosome
2. vacuole
3. mitochondrion
4. Golgi apparatus
Subtopic: Vacuole |
96%
From NCERT
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Subtopic: Cytoskeleton | Cilia & Flagella |
80%
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Which of the following combinations are correct in response to plastids?
A. Amyloplasts store carbohydrates
B. Leucoplasts gives a red colour to the plant
C. Xanthophyll gives yellow and orange colours to parts of the plant
D. Carotenoid pigments are responsible for tapping light energy
E. Chlorophyll gives a red color
Choose the correct answer from the options given below:
A. Amyloplasts store carbohydrates
B. Leucoplasts gives a red colour to the plant
C. Xanthophyll gives yellow and orange colours to parts of the plant
D. Carotenoid pigments are responsible for tapping light energy
E. Chlorophyll gives a red color
Choose the correct answer from the options given below:
| 1. | A & B only | 2. | A, C, D only |
| 3. | A, B, C, D only | 4. | A & D only |
Subtopic: Plastids |
73%
From NCERT
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In bacterial flagellum, the longest portion that extends from the cell surface to the outside in order to help motility is
1. Basal body
2. Hook
3. Filament
4. Pili
1. Basal body
2. Hook
3. Filament
4. Pili
Subtopic: Cilia & Flagella |
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The Bacteria and Eukarya domains are distinguished by:
| 1. | All members of Bacteria are single-celled and all members of Eukarya are multicellular |
| 2. | Only Eukaryotes have DNA |
| 3. | Only Eukaryotes have the ability to grow and reproduce |
| 4. | In Bacteria, there is an absence of membranous organelles, such as a nucleus |
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
76%
From NCERT
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below.
| Statement I: | Cholesterol molecules present in the phospholipid bilayer maintain fluidity under different environmental conditions. |
| Statement II: | Unsaturated fatty acid chains present in the phospholipid bilayer take up more space thereby helping the membrane stay fluid. |
| 1. | Both Statement I and statement II are true |
| 2. | Both Statement I and statement II are false |
| 3. | Statement I is correct but statement II is false |
| 4. | Statement I is incorrect but statement II is true |
Subtopic: Cell Membrane |
54%
From NCERT
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Match List I with List II
Choose the correct answer from the options given below:
1. A - (III); B - (II); C - (IV); D - (I)
2. A - (I); B - (II); C - (III); D - (IV)
3. A - (III); B - (IV); C - (I); D - (II)
4. A - (III); B - (II); C - (I); D - (IV)
| List I | List II |
| A. Stroma | I. Vacuole membrane |
| B. Plasmodesmata | II. Infoldings in mitochondria |
| C. Tonoplast | III. Fluid inside Chloroplast |
| D. Cristae | IV. Cytoplasmic connections |
1. A - (III); B - (II); C - (IV); D - (I)
2. A - (I); B - (II); C - (III); D - (IV)
3. A - (III); B - (IV); C - (I); D - (II)
4. A - (III); B - (II); C - (I); D - (IV)
Subtopic: Mitochondria | Vacuole |
94%
From NCERT
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