The C4 plants grow very efficiently in warm climates because they

(1) consume fewer ATP molecules for glucose synthesis

(2) minimize photorepsiratory losses

(3) have more efficient chloroplasts

(3) contain enzymes which are not inactivated at high temperatures.

 

Subtopic:  C4 Plants Examples | Question on C4 Pathway |
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Following is needed in the ionic form during non-cyclic photophosphorylation but not during cyclic photophosphorylations in higher plants. 

(1) copper

(2) iron

(3) manganese

(4) zinc

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
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Production of NADPH in a chloroplast takes place during

(1) cyclic photophosphorylation

(2) non-cyclic photophosphorylation

(3) series photophosphorylation

(4) substrate level photophosphorylation.

Subtopic:  Light Reactions :2 | Light Reactions |
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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 |
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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 |
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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 |
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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 |
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Blackman's law is related to 

(1) respiration

(2) transpiration

(3) root pressure

(4) photosynthesis.

Subtopic:  Historical View: Experiments |
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Who discovered photophosphorylation?

(1) Arnon et. al.

(2) Von Mayer

(3) Clavin et.al.

(4) Hill

Subtopic:  Light Reaction: Photophosphorylation |
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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 |
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