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Q. No.Resistance to an antibiotic is the character conferred to bacterial cell by:
1.
Peptidoglycan cell wall
2.
Main chromosomal DNA
3.
Plasmid DNA
4.
Satellite DNA
Subtopic: Prokaryotic Cell Organisation |
86%
Level 1: 80%+
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Bacterial cells, if motile, will move with the help of:
| 1. | Cilia | 2. | Flagella |
| 3. | Myocytes | 4. | Pseudopodia |
Subtopic: Details of Prokaryotic Cell Structure |
90%
Level 1: 80%+
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Consider the two statements:
| Statement I: | Besides flagella, Pili and Fimbriae are also surface structures of the bacteria but do not play a role in motility. |
| Statement II: | Pili and fimbriae help attach the bacteria to rocks in streams and also to the host tissues. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Details of Prokaryotic Cell Structure |
Level 3: 35%-60%
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The correct description of prokaryotic ribosomes will be:
| 1. | They are about 15 nm by 20 nm in size and are made of two subunits - 50S and 30S units which when present together form 70S prokaryotic ribosomes. |
| 2. | They are about 15 nm by 20 nm in size and are made of two subunits - 40S and 30S units which when present together form 70S prokaryotic ribosomes. |
| 3. | They are about 20 nm by 25 nm in size and are made of two subunits - 60S and 40S units which when present together form 80S prokaryotic ribosomes. |
| 4. | They are about 25 nm by 50 nm in size and are made of two subunits - 50S and 20S units which when present together form 70S prokaryotic ribosomes. |
Subtopic: Details of Prokaryotic Cell Structure |
92%
Level 1: 80%+
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Ribosomes are the site of protein synthesis. Identify the correct statement:
| I: | Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. |
| II: | The ribosomes of a polysome translate the mRNA into different proteins. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Ribosome and Inclusion Bodies |
Level 4: Below 35%
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Reserve material in prokaryotic cells is stored in the cytoplasm in the form of:
| 1. | inclusion bodies | 2. | carboxysomes |
| 3. | magnetosomes | 4. | chromatophores |
Subtopic: Ribosome and Inclusion Bodies |
94%
Level 1: 80%+
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Consider the given two statements:
| Assertion (A): | In eukaryotic cells, there is an extensive compartmentalisation of cytoplasm. |
| Reason (R): | Eukaryotic cells possess an organised nucleus with a nuclear envelope. |
| 1. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain the(A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Eukaryotic Cell Orgenelle |
68%
Level 2: 60%+
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Plant and animal cells are different. Identify the correct difference:
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: | Plant cells possess cell walls, plastids and a large central vacuole which are absent in animal cells. |
| II: | Animal cells have centrioles which are absent in almost all plant cells. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Eukaryotic Cell Orgenelle |
90%
Level 1: 80%+
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What is not true regarding the detailed structure of a typical cell membrane?
| 1. | The cell membrane is mainly composed of lipids and proteins. |
| 2. | The major lipids are phospholipids that are arranged in a bilayer. |
| 3. | The lipids are arranged within the membrane with the polar head towards the inner sides and the hydrophobic tails towards the outer part. |
| 4. | In addition to phospholipids, membrane also contains cholesterol. |
Subtopic: Eukaryotic Cell Orgenelle |
90%
Level 1: 80%+
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In human beings, the membrane of the erythrocyte has approximately:
| 1. | 52 per cent protein and 40 per cent lipids. |
| 2. | 40 per cent protein and 52 per cent lipids. |
| 3. | 50 per cent protein and 40 per cent lipids. |
| 4. | 60 per cent protein and 40 per cent lipids. |
Subtopic: Eukaryotic Cell Orgenelle |
90%
Level 1: 80%+
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