Given below is the schematic diagram of Calvin cycle taking place in a certain plant. ATP used by this plant is radioactively labeled. One turn of the cycle is allowed to happen. Radioactivity would be seen in all except:

  

1. A
2. B
3. C and D
4. E

Subtopic:  Dark Reaction : Calvin Cycle |
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Oxidation of pyruvate occurs in mitochondria in pjotosthesizing cells as well. In such this occurs:
1. in photosynthetic cells in the light, while photosynthesis occurs concurrently
2. in non-photosynthesizing cells only
3.in photosynthesizing cells in dark periods and in other tissues all the time
4. in photosynthesizing cells in the light and in other tissues in the dark

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For the synthesis of glucose, the source of hydrogen atoms is:

1. Water 2. NADPH
3. FADH2 4. Monosaccharides
Subtopic:  Dark Reaction: Biosynthetic Phase |
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In cyclic photophosphorylation, the primary electron acceptor is:
1. An iron-sulfur protein
2. Plastocyanin
3. Plastoquinone
4. Water

Subtopic:  Light Reaction: Electron Transport |
 73%
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If chloroplasts are illuminated with sunlight, the lowest pH would be observed in:

1. stroma 2. intermembrane space
3. thylakoid space 4. cytosol
Subtopic:  Chemiosmotic hypothesis |
 73%
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To establish a proton gradient across the thylakoid membrane, the protons are provided by:

1. Glucose 2. Chlorophyll
3. Membrane proteins 4. Water
Subtopic:  Chemiosmotic hypothesis |
 69%
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Heme and iron-sulfur complexes in photosynthesis:
1. act as reducing agents
2. act as oxidizing agents
3. both oxidize and reduce during electron transport
4. are needed only in respiration but not in photosynthesis

Subtopic:  Light Reaction: Electron Transport |
 57%
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Identify the correct statement:

1. The pH within the thylakoid is less than that of the stroma.
2. The pH of the stroma is higher than that of the other two measurements.
3. The pH of the stroma is higher than that of the thylakoid space but lower than that of the cytosol.
4. The pH of the thylakoid space is higher than that observed anywhere else in the cell.
Subtopic:  Chemiosmotic hypothesis |
 73%
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The pathway shown in the figure will be seen in:

1. C4 plants
2. CAM plants
3. C3 plants
4. All photosynthetic plants

Subtopic:  C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
 90%
From NCERT
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Carbon dioxide fixation will be inhibited by oxygen in:

1. cell I only.
2. cell II only.
3. neither cell I nor cell II.
4. both cell I and cell II.

Subtopic:  C4 Cycle (Hatch & Slack Pathway) |
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