The lactose present in the growth medium of bacteria is transported to the cell by the action of:
| 1. | Acetylase | 2. | Permease |
| 3. | Polymerase | 4. | Beta-galactosidase |
Subtopic: Gene Regulation: Lac Operon |
61%
Level 2: 60%+
NEET - 2024
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Bulliform cells are responsible for
| 1. | Protecting the plant from salt stress. |
| 2. | Increased photosynthesis in monocots. |
| 3. | Providing large spaces for storage of sugars. |
| 4. | Inward curling of leaves in monocots. |
Subtopic: Monocot Leaf |
78%
Level 2: 60%+
NEET - 2024
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Subtopic: Enzyme Cofactors |
67%
Level 2: 60%+
NEET - 2024
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Read the following statements and choose the set of correct statements:
In the members of Phaeophyceae,
Choose the correct answer from the options given below:
In the members of Phaeophyceae,
| A: | Asexual reproduction occurs usually by biflagellate zoospores. |
| B: | Sexual reproduction occurs by oogamous method only. |
| C: | Stored food is in the form of carbohydrates which is either mannitol or laminarin. |
| D: | The major pigments found are chlorophyll a, c and carotenoids and xanthophyll. |
| E: | Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin. |
| 1. | B, C, D and E only | 2. | A, C, D and E only |
| 3. | A, B, C and E only | 4. | A, B, C and D only |
Subtopic: Pheophyceae: Brown Algae |
76%
Level 2: 60%+
NEET - 2024
Hints
Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I | List-II | ||
| A. | Robert May | I. | Species-Area relationship |
| B. | Alexander von Humboldt | II. | Long term ecosystem experiment using outdoor plots |
| C. | Paul Ehrlich | III. | Global species diversity is about 7 million |
| D. | David Tilman | IV. | Rivet Popper hypothesis |
| 1. | A-III, B-I, C-IV, D-II | 2. | A-I, B-III, C-II, D-IV |
| 3. | A-III, B-IV, C-II, D-I | 4. | A-II, B-III, C-I, D-IV |
Subtopic: Biodiversity Patterns | Biodiversity |
83%
Level 1: 80%+
NEET - 2024
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the option given below:
| Statement I: | In \(\text{C}_3\) plants, some \( \text{O}_2\) binds to \(\text{RuBisCO},\) hence \(\text{CO}_2\) fixation is decreased. |
| Statement II: | In \( \text{C}_4\) plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. |
In the light of the above statements, choose the correct answer from the option given below:
| 1. | Both Statement I and Statement II are False |
| 2. | Statement I is True but Statement II is False |
| 3. | Statement I is False but Statement II is True |
| 4. | Both Statement I and Statement II are True |
Subtopic: Photorespiration |
58%
Level 3: 35%-60%
NEET - 2024
Hints
The DNA present in chloroplast is:
| 1. | Circular, double stranded |
| 2. | Linear, single stranded |
| 3. | Circular, single stranded |
| 4. | Linear, double stranded |
Subtopic: Plastids |
77%
Level 2: 60%+
NEET - 2024
Hints
In an ecosystem, if the Net Primary Productivity (NPP) of first trophic level is \(100 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1},\) what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
| 1. | \(x\left(\mathrm{kcal}~ \mathrm{m}^{-2}\right) y r^{-1}\) |
| 2. | \(10 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}\) |
| 3. | \(\dfrac{100 x}{3 x}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}\) |
| 4. | \(\dfrac{x}{10}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) y r^{-1}\) |
Subtopic: Ecosystem Productivity | Energy Flow |
Level 3: 35%-60%
NEET - 2024
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Which of the following are fused in somatic hybridization involving two varieties of plants?
| 1. | Somatic embryos | 2. | Protoplasts |
| 3. | Pollens | 4. | Callus |
Subtopic: Plant Tissue Culture |
68%
Level 2: 60%+
NEET - 2024
Hints
Match List-I with List-II:
Choose the correct answer from the option given below:
1. A-II, B-I, C-IV, D-III
2. A-III, B-IV, C-I, D-II
3. A-IV, B-III, C-II, D-I
4. A-I, B-II, C-III, D-IV
| List-I | List-II | ||
| A. | Citric acid cycle | I. | Cytoplasm |
| B. | Glycolysis | II. | Mitochondrial matrix |
| C. | Electron transport system |
III. | Intermembrane space of mitochondria |
| D. | Proton gradient | IV. | Inner mitochondrial membrane |
1. A-II, B-I, C-IV, D-III
2. A-III, B-IV, C-I, D-II
3. A-IV, B-III, C-II, D-I
4. A-I, B-II, C-III, D-IV
Subtopic: Glycolysis | Kreb's Cycle | Oxidative Phosphorylation | ETS |
80%
Level 1: 80%+
NEET - 2024
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