The photoautotrophic organisms that do not split water to obtain reducing power are 

(1) purple bacteria 

(2) cyanobacteria

(3) green plants

(4) none of these

Subtopic:  Historical View: Experiments |
 64%
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Dark reaction occurs

(1) only in light

(2) only in the absence of light

(3) independent of light

(4) both (1) and (3).

Subtopic:  Dark Reaction: Biosynthetic Phase |
From NCERT
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Photorespiration, usually occurs in

(1) one cell organelle

(2) two cell organelles

(3) three cell organelles

(4) four cell organelles.

Subtopic:  Photorespiration |
 66%
AIIMS - 2001
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Which of the following statements about phytochrome is true?

1. Pr absorbs yellow light and becomes Pfr 

2. Pr absorbs red light and becomes Pfr 

3. Pfr absorbs red light and becomes Pr 

4. Pfr absorbs yellow light and becomes Pr .

Subtopic:  Photosystems |
 69%
AIIMS - 2001
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Blackman's law is related to 

(1) respiration

(2) transpiration

(3) root pressure

(4) photosynthesis.

Subtopic:  Historical View: Experiments |
 88%
From NCERT
AIIMS - 2001
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Who discovered photophosphorylation?

(1) Arnon et. al.

(2) Von Mayer

(3) Clavin et.al.

(4) Hill

Subtopic:  Light Reaction: Photophosphorylation |
AIIMS - 2001
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Photosynthetic bacteria do not contain

(1) quantasome

(2) PS-I and PS-II

(3) PS-I

(4) PS-II.

Subtopic:  Photosystems |
AIIMS - 2001
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The photorespiratory carbon-oxidation cycle involves the interaction of

1. chloroplast

2. mitochordria

3. peroxisomes

4. all of these.

Subtopic:  Photorespiration |
 90%
AIIMS - 2002
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Photorespiration in C3 plants starts from:

(1) phosphoglycerate

(2) phosphoglycolate

(3) Glycerate

(4) glycine.

Subtopic:  Photorespiration |
AIIMS - 2003
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Hill reaction occurs in:

(1) high altitude plants

(2) total darkness

(3) absence of water

(4) presence of ferricyanide

Subtopic:  Light Reaction: Photophosphorylation |
AIIMS - 2003
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