Photorespiration is favoured by
(1) high O2 and low CO2 concentration
(2) low O2 and high CO2 concentration
(3) low light intensity
(4) low temperature.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFollowing 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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyProduction of NADPH in a chloroplast takes place during
1. cyclic photophosphorylation
2. non-cyclic photophosphorylation
3. series photophosphorylation
4. substrate level photophosphorylation.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe photoautotrophic organisms that do not split water to obtain reducing power are
(1) purple bacteria
(2) cyanobacteria
(3) green plants
(4) none of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDark reaction occurs
(1) only in light
(2) only in the absence of light
(3) independent of light
(4) both (1) and (3).
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPhotorespiration, usually occurs in
(1) one cell organelle
(2) two cell organelles
(3) three cell organelles
(4) four cell organelles.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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 .
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBlackman's law is related to
(1) respiration
(2) transpiration
(3) root pressure
(4) photosynthesis.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWho discovered photophosphorylation?
(1) Arnon et. al.
(2) Von Mayer
(3) Clavin et.al.
(4) Hill
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology