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Q. No.NADH + H+ is reoxidised to NAD+ in:
I: Ethanol fermentation
II: Lactate fermentation
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Fermentation |
87%
From NCERT
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Consider the given two statements:
| Assertion (A): | Carbon dioxide is not produced in glycolysis. |
| Reason (R): | Glycolysis is a metabolic pathway that does not require oxygen. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True and but (R) does not correctly explain (R) |
| 4. | (A) is False but (R) is True |
Subtopic: Glycolysis |
61%
From NCERT
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The glycolytic pathway has an investment of 2 ATP molecules. At which of the following steps is the debt paid off?
| 1. | Conversion of Glucose into Glucose-6-phospahte |
| 2. | Conversion of Fructose-6-phosphate into Fructose 1,6-biphospahte |
| 3. | Conversion of 1,3 biphoshoglyceric acid into 3-phosphoglyceric acid |
| 4. | Conversion of Phosphoenol pyruvate into Pyruvic acid |
Subtopic: Glycolysis |
57%
From NCERT
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Consider the two given statements:
| Assertion (A): | In aerobic cellular respiration the presence of oxygen is vital. |
| Reason (R): | Oxygen acts as the final hydrogen acceptor. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: ETS |
79%
From NCERT
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Conversion of sucrose into glucose and fructose is catalyzed by:
1. Phosphofructokinase
2. Aldolase
3. Hexokinase
4. Invertase
1. Phosphofructokinase
2. Aldolase
3. Hexokinase
4. Invertase
Subtopic: Glycolysis |
83%
From NCERT
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Regeneration of which of the following is an important role of fermentation in cellular respiration:
1. NADH
2. NADP+
3. NAD+
4. NADPH
1. NADH
2. NADP+
3. NAD+
4. NADPH
Subtopic: Fermentation |
74%
From NCERT
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“Plants can get along without respiratory organs”. The valid arguments in favour of the statement will be:
I: Each plant part takes care of its own gas-exchange needs.
II: Plants do not present great demands for gas exchange.
III: The distance that gases must diffuse even in large, bulky plants is not great.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
I: Each plant part takes care of its own gas-exchange needs.
II: Plants do not present great demands for gas exchange.
III: The distance that gases must diffuse even in large, bulky plants is not great.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Introduction |
78%
From NCERT
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Consider the given two statements:
Assertion (A): All living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen.
Reason (R) : The first cells on this planet lived in an atmosphere that lacked oxygen.
1. Both (A) and (R) are true but (R) is not the correct explanation of (A).
2. (A) is true but (R) is false.
3. Both (A) and (R) are true and (R) correctly explains (A).
4. (A) is false but (R) is true.
Assertion (A): All living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen.
Reason (R) : The first cells on this planet lived in an atmosphere that lacked oxygen.
1. Both (A) and (R) are true but (R) is not the correct explanation of (A).
2. (A) is true but (R) is false.
3. Both (A) and (R) are true and (R) correctly explains (A).
4. (A) is false but (R) is true.
Subtopic: Introduction |
From NCERT
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In the given schematic representation of ethanol fermentation, the enzymes catalysing the step 2 and 3 respectively are:
1. Pyruvate dehydrogenase and alcohol dehydrogenase
2. Pyruvic acid decarboxylase and alcohol dehydrogenase
3. Pyruvate dehydrogenase and alcohol decarboxylase
4. Pyruvic acid decarboxylase and alcohol decarboxylase
1. Pyruvate dehydrogenase and alcohol dehydrogenase
2. Pyruvic acid decarboxylase and alcohol dehydrogenase
3. Pyruvate dehydrogenase and alcohol decarboxylase
4. Pyruvic acid decarboxylase and alcohol decarboxylase
Subtopic: Fermentation |
71%
From NCERT
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Consider the given two statements:
Statement I: It is very important to oxidise glucose not in one step but in several small steps in living cells.
Statement II: Some steps can be just large enough such that the energy released can be coupled to ATP synthesis.
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Statement I: It is very important to oxidise glucose not in one step but in several small steps in living cells.
Statement II: Some steps can be just large enough such that the energy released can be coupled to ATP synthesis.
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Introduction |
85%
From NCERT
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