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Q. No.Name the German botanist who, for the first time, stated that all plant tissues are composed of individual cells:
1. Theodor Schwann
2. Rudolf Virchow
3. Matthias Schleiden
4. Alfred Russel Wallace
2. Rudolf Virchow
3. Matthias Schleiden
4. Alfred Russel Wallace
Subtopic: Cell Theory |
85%
From NCERT
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Which of the following cellular structures will not be found in E. coli?
1. Plasma membrane
2. Ribosome
3. Cell wall
4. Nuclear envelope
1. Plasma membrane
2. Ribosome
3. Cell wall
4. Nuclear envelope
Subtopic: Prokaryotic Cell Organisation |
88%
From NCERT
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The channels that connect the adjacent plant cells through their walls are called:
| 1. | Plasmodesmata | 2. | Desmosomes |
| 3. | Gap junctions | 4. | Intercalated discs |
Subtopic: Cell Wall |
93%
From NCERT
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Carotenoid pigments like carotene and xanthophylls:
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: | are present on chromoplasts. |
| II: | are not lipid soluble. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Plastids |
68%
From NCERT
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Consider the given two statements:
| Statement I: | The approximate percent composition of proteins and lipids in the cell membrane of a human erythrocyte is respectively 40% and 52%. |
| Statement II: | The measure of fluidity of a cell membrane is the ability of proteins to flip-flop between the two layers of phospholipid. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Evidence for Fluidic Nature of Membrane |
From NCERT
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The quasi-fluid nature of the cell membrane is primarily because of
1. Phospholipids
2. Cholesterol
3. Carbohydrates
4. Proteins.
1. Phospholipids
2. Cholesterol
3. Carbohydrates
4. Proteins.
Subtopic: Evidence for Fluidic Nature of Membrane |
89%
From NCERT
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What are chromatophores in prokaryotic cells?
| 1. | Lipopolysaccharide layer of gram negative bacteria |
| 2. | Colored pigments in fluorescent bacteria |
| 3. | Carbon concentrating compartments in photosynthetic bacteria |
| 4. | Membrane-bound vesicles containing photosynthetic pigments |
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
70%
From NCERT
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Which of the following functions is associated with the Rough Endoplasmic Reticulum (RER)?
1. Synthesis of steroid hormones
2. Detoxification of drugs and poisons
3. Synthesis of proteins destined for secretion
4. Storage of calcium ions
1. Synthesis of steroid hormones
2. Detoxification of drugs and poisons
3. Synthesis of proteins destined for secretion
4. Storage of calcium ions
Subtopic: Endomembrane System (Endoplasmic Reticulum) |
91%
From NCERT
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What is the primary function of the nucleolus found within the nucleus?
| 1. | It is the site of ribosome assembly. |
| 2. | It serves as the storage area for DNA. |
| 3. | It is responsible for the synthesis of lipids. |
| 4. | It plays a role in cell division. |
Subtopic: Nucleus |
75%
From NCERT
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Cell membrane proteins can be classified as integral and peripheral on the basis of
| 1. | Their size | 2. | Their function |
| 3. | Ease of extraction | 4. | Chemical nature |
Subtopic: Cell Membrane |
84%
From NCERT
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