12th Grade > Biology
PHOTOSYNTHESIS IN HIGHER PLANTS MCQs
Total Questions : 59
| Page 2 of 6 pages
Answer: Option C. -> release of oxygen
:
C
Release of Oxygen in photosynthesis is during the photolysis of water in the non-cyclic photophosphorylation.
:
C
Release of Oxygen in photosynthesis is during the photolysis of water in the non-cyclic photophosphorylation.
Answer: Option C. -> In both cases, rubisco is not used to fix carbon initially.
:
C
C4 andCAM plantsare plants that use certain special compounds to gather carbon dioxide (CO2) during photosynthesis. Using these compounds allows these plants to extract more CO2from a given amount of air, helping them prevent water loss in dry climates.
:
C
C4 andCAM plantsare plants that use certain special compounds to gather carbon dioxide (CO2) during photosynthesis. Using these compounds allows these plants to extract more CO2from a given amount of air, helping them prevent water loss in dry climates.
Answer: Option A. -> five
:
A
In the C3 cycle, one molecule of CO2 is fixed onto a molecule of ribulose 1,5-bisphosphate (RuBP), which has 5 carbon atoms.
:
A
In the C3 cycle, one molecule of CO2 is fixed onto a molecule of ribulose 1,5-bisphosphate (RuBP), which has 5 carbon atoms.
Answer: Option A. -> Both assertion and reason are true and the reason is the correct explanation for assertion.
:
A
C4pathway is more recently involved in C3pathway and involves a superior carbon dioxide fixing mechanism. C4pathway is more efficient than C3pathway.
:
A
C4pathway is more recently involved in C3pathway and involves a superior carbon dioxide fixing mechanism. C4pathway is more efficient than C3pathway.
Answer: Option B. -> to test for liberation of O2 in the light.
:
B
Oxygen is released during non-cyclic photophosphorylation in which both PS1 and PS 2 are involved.
:
B
Oxygen is released during non-cyclic photophosphorylation in which both PS1 and PS 2 are involved.
Answer: Option D. -> thylakoid membrane of the chloroplast
:
D
All the phtotosynthetic machinery responsible for the light-dependent reactions are present in the thylakoid membranes, forming the grana. Therefore the pigment molecules which form the light harvesting components of photosynthesis are also present here.
:
D
All the phtotosynthetic machinery responsible for the light-dependent reactions are present in the thylakoid membranes, forming the grana. Therefore the pigment molecules which form the light harvesting components of photosynthesis are also present here.
Answer: Option B. -> P700
:
B
PS-I is driven by far red light and PS-II by red light. The main components of PS-I are chl-a (P700), chlorophyll-b and β-carotene.
:
B
PS-I is driven by far red light and PS-II by red light. The main components of PS-I are chl-a (P700), chlorophyll-b and β-carotene.
Answer: Option D. -> Presence of ferricyanide
:
D
Hill Reaction was discovered by Robert Hill in 1939. It involves the release of oxygen from isolated illuminated chloroplasts when suitable electron acceptors (e.g potassium ferricyanide) are added to the surrounding water.
:
D
Hill Reaction was discovered by Robert Hill in 1939. It involves the release of oxygen from isolated illuminated chloroplasts when suitable electron acceptors (e.g potassium ferricyanide) are added to the surrounding water.
Answer: Option D. -> Phosphoenol pyruvic acid carboxylase
:
D
In C4plants, carbon dioxide is picked by phosphoenol pyruvate (PEP) and the reaction being catalysed byPEP carboxylase.
:
D
In C4plants, carbon dioxide is picked by phosphoenol pyruvate (PEP) and the reaction being catalysed byPEP carboxylase.
Answer: Option C. -> the light-dependent reactions produce the energy-rich compounds that are used to run the light- independent reactions
:
C
The energy generated during the light reactions is used to fix CO2 to a carbohydrate.
:
C
The energy generated during the light reactions is used to fix CO2 to a carbohydrate.
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