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Photosynthesis In Higher Plants Mock Tests

18 questions available

Photosynthesis In Higher Plants Mock Test 1

Questions: 18

Sample Questions

Class 11 Biology
In C₄ plants, the primary CO₂ acceptor in the mesophyll cells is:
A RuBisCO
B Phosphoenolpyruvate (PEP)
C Oxaloacetate
D Ribulose-1,5-bisphosphate (RuBP)
Class 11 Biology
In the C₃ photosynthetic pathway, the first stable product of CO₂ fixation is a 3-carbon compound. What is this compound, and which enzyme catalyzes its formation?
A Oxaloacetic acid (OAA) catalyzed by PEP carboxylase
B Glyceraldehyde-3-phosphate (G3P) catalyzed by RuBisCO
C 3-Phosphoglycerate (3-PGA) catalyzed by RuBisCO
D Ribulose-1,5-bisphosphate (RuBP) catalyzed by PEP carboxylase
Class 11 Biology
C₄ plants have a special adaptation for hot, dry environments that minimizes photorespiration. What is the primary CO₂ acceptor molecule in C₄ plants?
A RuBisCO
B Phosphoenolpyruvate (PEP)
C RuBP (Ribulose-1,5-bisphosphate)
D Oxaloacetic acid (OAA)
Class 11 Biology
In C₄ plants, the primary CO₂ acceptor molecule is:
A RuBisCO
B RuBP
C Phosphoenolpyruvate (PEP)
D Oxaloacetate (OAA)
Class 11 Biology
Photorespiration in plants occurs when RuBisCO acts as:
A Carboxylase at high O₂ and low CO₂
B Oxygenase at high O₂ and low CO₂
C Kinase at high ATP and low ADP
D Phosphatase at high NADPH and low NADP⁺
Class 11 Biology
Photorespiration in plants:
A Is a wasteful process that occurs when RuBisCO binds O₂ instead of CO₂, especially in C3 plants under hot, dry conditions
B Is a beneficial process that produces additional ATP
C Occurs only in C4 plants
D Increases the rate of photosynthesis
Class 11 Biology
In which phase of photosynthesis is NADPH₂ produced?
A Reaction centre (light reaction)
B Calvin cycle
C Photorespiration
D Chemiosmosis
Class 11 Biology
In the C3 pathway, the first stable product of CO₂ fixation is:
A Oxaloacetic acid (OAA)
B Ribulose bisphosphate (RuBP)
C 3-Phosphoglyceric acid (3-PGA)
D Glyceraldehyde-3-phosphate (G3P)

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