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.

 

Concept Questions :-

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

Concept Questions :-

Light Reactions :1
Light Reactions :2
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Phytochromes play a role in 

(1) seed germination

(2) flowering 

(3) photomorphogenesis

(4) photosynthesis.

Concept Questions :-

Light Reactions :1
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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.

Concept Questions :-

Light Reactions :2
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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).

Concept Questions :-

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.

Concept Questions :-

Photorespiration
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Stomata opens

(1) in day time - for gaseous exchange

(2) in day time - no gaseous exchange

(3) in night time only - for gaseous exchange

(4) in night time only - no gaseous exchange.

Concept Questions :-

Factors Affecting Photosynthesis
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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 .

Concept Questions :-

Photosystems
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Blackman's law is related to 

(1) respiration

(2) transpiration

(3) root pressure

(4) photosynthesis.

Concept Questions :-

Historical View: Experiments
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Who discovered photophosphorylation?

(1) Arnon et. al.

(2) Von Mayer

(3) Clavin et.al.

(4) Hill

Concept Questions :-

Light Reaction: Photophosphorylation
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