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.
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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
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Phytochromes play a role in
(1) seed germination
(2) flowering
(3) photomorphogenesis
(4) photosynthesis.
Concept Questions :-
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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 :-
Difficulty Level:
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 :-
Difficulty Level:
Photorespiration, usually occurs in
(1) one cell organelle
(2) two cell organelles
(3) three cell organelles
(4) four cell organelles.
Concept Questions :-
Difficulty Level:
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 :-
Difficulty Level:
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 :-
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Blackman's law is related to
(1) respiration
(2) transpiration
(3) root pressure
(4) photosynthesis.
Concept Questions :-
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Who discovered photophosphorylation?
(1) Arnon et. al.
(2) Von Mayer
(3) Clavin et.al.
(4) Hill
Concept Questions :-
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