Q. No.Which of the following is the most common substrate for respiration in plants?
| 1. | Amino acids | 2. | Organic acids |
| 3. | Glucose | 4. | Lipids |
Subtopic: Respiratory Quotient |
93%
Level 1: 80%+
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The respiratory quotient (RQ) of glucose during aerobic respiration is:
1. 0.5
2. 0.7
3. 1.0
4. 0.1
1. 0.5
2. 0.7
3. 1.0
4. 0.1
Subtopic: Respiratory Quotient |
90%
Level 1: 80%+
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Subtopic: Respiratory Quotient |
79%
Level 2: 60%+
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Consider the given two statements:
A: In plants, the RQ of organic acids is less than 1.
R: Organic acids contain more oxygen in proportion to carbon
1. A and R both true, R explains A
2. A and R both true, R not explanation
3. A true, R false
4. A false, R true
A: In plants, the RQ of organic acids is less than 1.
R: Organic acids contain more oxygen in proportion to carbon
1. A and R both true, R explains A
2. A and R both true, R not explanation
3. A true, R false
4. A false, R true
Subtopic: Respiratory Quotient |
Level 3: 35%-60%
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If a plant is provided with only fatty acids as respiratory substrate, the RQ value will be:
1. 1
2. More than 1
3. Less than 1
4. Infinite
1. 1
2. More than 1
3. Less than 1
4. Infinite
Subtopic: Respiratory Quotient |
84%
Level 1: 80%+
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In plant tissues respiring predominantly on organic acids as respiratory substrates, the respiratory quotient (RQ) is expected to be:
1. Equal to unity due to equal moles of CO₂ released and O₂ consumed during oxidation.
2. Less than unity because oxygen consumption exceeds carbon dioxide evolution.
3. Variable and unpredictable due to simultaneous oxidation of carbohydrates.
4. Greater than unity because decarboxylation steps release excess carbon dioxide.
1. Equal to unity due to equal moles of CO₂ released and O₂ consumed during oxidation.
2. Less than unity because oxygen consumption exceeds carbon dioxide evolution.
3. Variable and unpredictable due to simultaneous oxidation of carbohydrates.
4. Greater than unity because decarboxylation steps release excess carbon dioxide.
Subtopic: Respiratory Quotient |
67%
Level 2: 60%+
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The respiratory quotient (RQ) for carbohydrate, fat, and protein oxidation are respectively:
1. 1.0, less than 1.0, and approximately 1.0
2. Less than 1.0, 1.0, and greater than 1.0
3. 1.0, greater than 1.0, and less than 1.0
4. Greater than 1.0, 1.0, and less than 1.0
1. 1.0, less than 1.0, and approximately 1.0
2. Less than 1.0, 1.0, and greater than 1.0
3. 1.0, greater than 1.0, and less than 1.0
4. Greater than 1.0, 1.0, and less than 1.0
Subtopic: Respiratory Quotient |
87%
Level 1: 80%+
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Respiratory quotient for fats is:
| 1. | Equal to one exactly |
| 2. | More than one value |
| 3. | Less than one value |
| 4. | Zero in anaerobic conditions |
Subtopic: Respiratory Quotient |
91%
Level 1: 80%+
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The respiratory quotient (RQ) for fats is usually:
| 1. | Greater than 1 due to excess CO₂ release |
| 2. | Equal to 1 due to complete oxidation |
| 3. | Less than 1 due to more oxygen consumption |
| 4. | Infinite because no O₂ is required |
Subtopic: Respiratory Quotient |
91%
Level 1: 80%+
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The term respiratory substrate refers to compounds that:
1. Are synthesised during respiration
2. Undergo oxidation to release energy
3. Are stored only in seeds
4. Are end products of photosynthesis
1. Are synthesised during respiration
2. Undergo oxidation to release energy
3. Are stored only in seeds
4. Are end products of photosynthesis
Subtopic: Respiratory Quotient |
89%
Level 1: 80%+
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