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Q. No.During oxygenic photosynthesis in higher plants, in the light reactions, the source of replacement electrons
for Photosystem II is:
1. Glucose
2. Water
3. NADPH
4. Photosystem I
Subtopic: Light Reaction: Electron Transport |
87%
Level 1: 80%+
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Photosynthesis is carried out by green plants most effectively in what wavelength range of light?
| 1. | Green | 2. | Infrared |
| 3. | Blue and red | 4. | Ultraviolet |
Subtopic: Photosynthetic Pigments |
94%
Level 1: 80%+
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Consider the two statements:
| Statement I: | In the photorespiratory pathway, there is synthesis of sugars, but not of ATP. |
| Statement II: | Photorespiratory pathway results in the release of CO2 with the utilization of ATP. |
| 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: Photorespiration |
61%
Level 2: 60%+
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Consider the given two statements:
| Assertion (A): | The protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids. |
| Reason (R): | Splitting of the water molecule takes place on the inner side of the thylakoid membrane |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True; (R) is False |
| 3. | (A) is False; (R) is False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Light Reactions :1 |
83%
Level 1: 80%+
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The molecule used to fix carbon dioxide in Calvin cycle is:
| 1. | Acetyl CoA, a 2 carbon molecule |
| 2. | G3P (Glyceraldehyde-3-phosphate), a 3 carbon molecule |
| 3. | RuBP (Ribulose-1,5-bisphosphate), a 5 carbon molecule |
| 4. | Citrate, a 6 carbon molecule |
Subtopic: Dark Reaction : Calvin Cycle |
86%
Level 1: 80%+
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In the 1930s, van Neil correctly hypothesized that oxygen released in photosynthesis by green plants comes from:
| 1. | Carbon dioxide | 2. | Water |
| 3. | Glucose | 4. | Atmospheric oxygen |
Subtopic: Historical View: Experiments |
90%
Level 1: 80%+
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PS I differs from PS II as in the former, the reaction centre chlorophyll a has an absorption peak at:
1. 660 nm
2. 680 nm
3. 700 nm
4. 720 nm
1. 660 nm
2. 680 nm
3. 700 nm
4. 720 nm
Subtopic: Pigments |
87%
Level 1: 80%+
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The carboxylation of RuBP in Calvin cycle leads to the formation of:
1. Acetyl CoA
2. 3-PGA
3. Citric caid
4. Oxaloacetic acid
1. Acetyl CoA
2. 3-PGA
3. Citric caid
4. Oxaloacetic acid
Subtopic: Dark Reaction : Calvin Cycle |
87%
Level 1: 80%+
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For every CO2 molecule entering the Calvin cycle:
| 1. | 3 molecules of ATP and 2 of NADPH are required |
| 2. | 2 molecules of ATP and 3 of NADPH are required |
| 3. | 3 molecules of ATP and 3 of NADPH are required |
| 4. | 2 molecules of ATP and 2 of NADPH are required |
Subtopic: Dark Reaction : Calvin Cycle |
89%
Level 1: 80%+
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In the chloroplast, ATP synthase complex is found within the:
| 1. | thylakoid membrane | 2. | thylakoid space |
| 3. | stroma | 4. | outer membrane |
Subtopic: Chemiosmotic hypothesis |
79%
Level 2: 60%+
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