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Q. No.Read the following four statements A, B, C and D and select the right option having both correct statements:
STATEMENTS:
(A)
Z-scheme of light reaction takes place in the presence of PSI only
(B)
Only PSI functional in cyclic photophosphorylation
(C)
Cyclic photophosphorylation results in a synthesis of ATP and NADPH2
(D)
Stroma lamellae lack PSII as well as NADP
Options:
1. A and B
2. B and C
3. C and D
4. B and D
Subtopic: Light Reaction: Photophosphorylation | Light Reactions |
83%
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AIPMT - 2010
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Read the following four statements A,B,C and D. Select the right option
A. Z scheme of light reaction takes place in the presence of PS I only
B. only PS I is functional in cyclic photophosphorylation
C. cyclic photophosphorylation results into synthesis of ATP and NADPH2
D. stroma lamellae lack PS II as well as NADP
1. A and B
2. B and C
3. C and D
4. B and D
Subtopic: Light Reactions |
88%
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Given below are two statements:
| Assertion (A): | During Calvin cycle, regeneration of RuBP is crucial for uninterrupted cycle. |
| Reason (R): | RuBP in Calvin cycle acts as a CO2 acceptor. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Dark Reaction : Calvin Cycle |
77%
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Given below are two statements:
| Assertion (A): | Six molecules of CO2 and twelve molecules of NADPH + H+ and 18 ATP are used to form one hexose molecules. |
| Reason (R): | Light reaction results in formation of ATP and NADPH2. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
78%
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A:
Peroxisomes
participate in photorespiration in C4 plants.
R: Catalase enzyme is present in high concentration in peroxisomes
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: Catalase enzyme is present in high concentration in peroxisomes
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Questions on Photorespiration |
58%
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Given below are two statements:
| Assertion (A): | For evolution of O2 in photosynthesis, PS-II is required. |
| Reason (R): | PS II is reduced by pulling electrons from water due to which photolysis of H2O occurs. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Light Reaction: Electron Transport | Light Reactions :1 |
80%
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Given below are two statements
Statement I: In photosynthesis, the membrane system is responsible for the synthesis of ATP and NADH in carbon reaction
Statement II: In photosynthesis, enzymatic reactions synthesize sugar and which in turn form starch. These reactions are driven by light
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Statement I: In photosynthesis, the membrane system is responsible for the synthesis of ATP and NADH in carbon reaction
Statement II: In photosynthesis, enzymatic reactions synthesize sugar and which in turn form starch. These reactions are driven by light
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Subtopic: Light Reaction: Electron Transport |
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Read the following statements with respect to antenna molecules.
a The LHC are made up of hundreds of pigment molecules bound to proteins.
b Water splitting complex is associated with the PS-ll.
1. Only b is correct
2. Both a & b are incorrect
3. Only a is correct
4. Both a & b are correct
Subtopic: Photosystems |
84%
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| Column – I | Column - II | ||
| i. | Jan Ingenhousz | a. | discovery of O2 |
| ii. | Joseph Priestley | b. | Plants restore to the air whatever breathing animals and burning candles remove |
| iii. | T.W Englemann | c. | showed that only the green part of the plants could release oxygen |
| iv. | Julius von Sachs | d. | discovery of production of glucose in plants |
| e. | first action spectrum of photosynthesis | ||
| f. | Using a prism he split light into its spectral components and then illuminated Cladophora, placed in a suspension of aerobic bacteria. |
Which of the following shows the correct match?
1. i-c; ii-b; iii-a, e, f; iv-d
2. i-a, b; ii-c; iii-d; iv- e, f.
3. i-a; ii- b; iii- c, e; iv-f.
4. i-c, ii-a,b; iii-e, f; iv-d;
Subtopic: Historical View: Experiments |
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Assertion(A): Immediately after light becomes unavailable, the biosynthetic process continues for some time, and then stops.
Reason(R): It is misnomer to call a biosynthetic phase a dark reaction.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): It is misnomer to call a biosynthetic phase a dark reaction.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Dark Reaction: Biosynthetic Phase |
62%
From NCERT
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