- 1(current)
Q. No.Subtopic: Do Plants Breathe |
54%
Level 3: 35%-60%
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In plants, the requirement for respiratory gas exchange is far lower than in animals. Which combination of factors from the following is responsible for this condition?
1. A , B and C only
2. B, C and D only
3. A, C and D only
4. A, B, C and D
| A. | Plant organs such as roots, stems and leaves respire at comparatively slower rates |
| B. | Photosynthesising cells generate \(O_2\) within themselves, making external \(O_2\) availability less critical |
| C. | The living cells of even thick, woody stems are arranged in thin layers beneath bark and have lenticels for contact with air |
| D. | Most interior cells of stems are living and actively respiring, creating high gas exchange demands |
2. B, C and D only
3. A, C and D only
4. A, B, C and D
Subtopic: Do Plants Breathe |
81%
Level 1: 80%+
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Which of the following is the primary reason why plants can survive without specialised respiratory organs?
| 1. | Because chlorophyll molecules themselves directly absorb oxygen during respiration |
| 2. | Because gases are actively pumped from one organ to another through vascular tissues |
| 3. | Because plants respire at very high rates only during the night |
| 4. | Because each plant part independently fulfils its own gaseous exchange needs |
Subtopic: Do Plants Breathe |
89%
Level 1: 80%+
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Which one of the following statements regarding glycolysis is NOT correct?
1. It occurs in the cytoplasm of the cell
2. It is common to both aerobic and anaerobic respiration
3. It results in the net gain of 2 ATP molecules per glucose molecule
4. It directly requires molecular oxygen for completion
1. It occurs in the cytoplasm of the cell
2. It is common to both aerobic and anaerobic respiration
3. It results in the net gain of 2 ATP molecules per glucose molecule
4. It directly requires molecular oxygen for completion
Subtopic: Glycolysis | Do Plants Breathe |
85%
Level 1: 80%+
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Plants do not require specialised respiratory organs mainly because:
1. Each living cell is located close to the surface allowing diffusion
2. Plants respire only during photosynthesis
3. All plant tissues are photosynthetic
4. Respiration occurs only in leaves
1. Each living cell is located close to the surface allowing diffusion
2. Plants respire only during photosynthesis
3. All plant tissues are photosynthetic
4. Respiration occurs only in leaves
Subtopic: Do Plants Breathe |
92%
Level 1: 80%+
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- 1(current)
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