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Q. No.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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Sodium ions will be transported to the outside of the cell and potassium ions to the inside of the cell by:
| 1. | simple diffusion | 2. | facilitated diffusion |
| 3. | osmosis | 4. | active transport |
Subtopic: Cell Membrane |
81%
Level 1: 80%+
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How many of the given statements regarding cell wall are true?
1. 2
2. 3
3. 4
4. 5
| I: | A non-living rigid structure called the cell wall forms an outer covering for the plasma membrane of fungi and plants. |
| II: | Cell wall not only gives shape to the cell and protects the cell from mechanical damage and infection, it also helps in cell-to-cell interaction and provides barrier to undesirable macromolecules. |
| III: | Algae have cell wall, made of cellulose, galactans, mannans and minerals like calcium carbonate, while in other plants it consists of cellulose, hemicellulose, pectins and proteins. |
| IV: | The cell wall of a young plant cell, the primary wall is capable of growth. |
| V: | The secondary wall is formed on the outer (towards middle lamella) side of the cell. |
2. 3
3. 4
4. 5
Subtopic: Cell Wall |
66%
Level 2: 60%+
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The middle lamella is a layer of the cell wall complex in plant cells and is composed mainly of:
| 1. | Sodium alginate | 2. | Magnesium silicate |
| 3. | calcium pectate | 4. | Aluminium hydroxide |
Subtopic: Cell Wall |
94%
Level 1: 80%+
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The endomembrane system of a typical eukaryotic cell includes all the following except:
| 1. | Lysosomes | 2. | Golgi Apparatus |
| 3. | Vacuole | 4. | Mitochondria |
Subtopic: Endomembrane System |
87%
Level 1: 80%+
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