Carbon dioxide tagged with heavy isotope of oxygen was fed to a green algae in the presence of sunlight. Which of the following compounds would not be tagged with this isotope?
1. Phosphoglycerate
2. Phosphoglyceraldehyde
3. Glucose
4. Oxygen

Subtopic:  Historical View: Experiments |
 64%
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Light reaction of photosynthesis does not include:
1. chemiosmosis
2. oxygen liberation
3. charge separation
4. electron transport

Subtopic:  Light Reactions |
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Robin Hill discovered that the isolated chloroplasts from plants can release oxygen when they are illuminated by sunlight in the presence of a suitable electron acceptor. This showed:
I. oxygen (O2) is produced by a reaction that is separate from carbon dioxide (CO2) fixation.
II. the reaction in which oxygen is released requires light.
III. the light dependent reaction of photosynthesis is a result of a series of redox reactions.
1. I and II only
2. I and III only
3. II and III only
4. I, II and III

Subtopic:  Historical View: Experiments |
 50%
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The reactions of the Calvin cycle can take place as long as which of the following products of the light dependent reactions are available?

1. Water and Glucose 2. Water and ATP
3. Oxygen and Carbon dioxide 4. ATP and NADPH
Subtopic:  Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
 88%
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The factors that can be limiting for the light independent reactions of photosynthesis are:
1. CO2, temperature, and light
2. CO2, light, and water
3. water, temperature, and CO2
4. oxygen, water, and temperature

Subtopic:  Factors Affecting Photosynthesis |
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The absorption spectrum in the given diagram will be of:
  

1. Chlorophyll a 2. Chlorophyll b
3. Carotenoids 4.  Retinol
Subtopic:  Pigments |
 91%
From NCERT
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The reactions of the Calvin Cycle occur in:

1. stroma of the chloroplast
2. thylakoid membrane
3. lumen of the thylakoids
4. space between outer and inner membrane of the chloroplast
Subtopic:  Chemiosmotic hypothesis |
 73%
From NCERT
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The wavelengths of light most useful in photosynthesis are:

1. green and orange 2. red and blue
3. infrared and yellow 4. red and green
Subtopic:  Pigments |
 93%
From NCERT
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The correct chronological sequence of protein complexes in the thylakoid membrane involved in light reactions is:

1. Photosystem II (PS II), Cytochrome b6f complex, Photosystem I (PS I), and ATP synthase.
2. Photosystem I (PS I), Cytochrome b6f complex, Photosystem II (PS II), and ATP synthase.
3. Photosystem II (PS II), Photosystem I (PS I), Cytochrome b6f complex, and ATP synthase.
4. Photosystem I (PS I), Photosystem II (PS II), Cytochrome b6f complex, and ATP synthase.
Subtopic:  Light Reactions |
 82%
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The enzymes for synthesis of organic molecules, in autotrophic bacteria, are located:
1. on chloroplast membranes
2. in the cytosol
3. in the nucleoid region
4. along the inner surface of the plasma membrane

Subtopic:  Dark Reaction: Biosynthetic Phase |
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