Photosynthesis in Higher Plants MCQs | Photosynthesis in Higher Plants Objective Type Questions and Answers

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Questions
1 Photorespiration involves oxidation of
A PGA
B RuBP
C Chlorophyll a
D Both a and b

Answer:RuBP
2 C3 and C4 plants differ with respect to
A Number of ATP molecules consumed
B First product
C The substrate which accepts carbon dioxide
D All

Answer: All
3 In Calvin cycle, 1 molecule of glucose is formed from
A 6CO2 + 30ATP + 12NADPH
B 6CO2 + 12ATP
C 6CO2 + 18ATP + 12NADPH
D 6CO2 + 18ATP + 30NADPH

Answer: 6CO2 + 18ATP + 12NADPH
4 Where does the light reaction takes place?
A Grana
B Stroma
C Cytoplasm
D Endoplasmic reticulum

Answer:Grana
5 Electrons from the excited chlorophyll molecules of PS-II are first accepted by
A Pheophytin
B Ferredoxin
C Cytochrome f
D Cytochrome b

Answer:Pheophytin
6 Non-cyclic photophosphorylation results in the production of
A NADH
B NADPH
C ATP
D ATP and NADPH

Answer: ATP and NADPH
7 DCMU inhibits
A PS-I
B PS-II
C Oxidative phosphorylation
D It destroys chloroplast

Answer: PS-II
8 Maximum photosynthesis occurs in
A Blue light
B Red light
C White light
D Green light

Answer:Red light
9 The first acceptor of CO2 in C4 plants is
A Aspartic acid
B Malic acid
C Oxaloacetic acid
D Phosphoenolpyruvate

Answer: Phosphoenolpyruvate
10 The first product of C4 pathway is
A PGA
B DHAP
C Oxaloacetate
D Phosphoenolpyruvate

Answer: Oxaloacetate
11 The two pigment system theory of photosynthesis was proposed by
A Aron
B Blackman
C Hill
D Emerson

Answer: Emerson
12 H2 donor during photosynthesis is
A ATP
B NADP
C NADPH
D NADH

Answer: NADPH
13 The minerals involved in splitting reaction during photosynthesis is
A Potassium and manganese
B Magnesium and chlorine
C Potassium and chlorine
D Manganese and chlorine

Answer: Manganese and chlorine
14 The water-soluble photosynthetic pigment is
A Chlorophyll a
B Xanthophyll
C Anthocyanin
D Chlorophyll b

Answer: Anthocyanin
15 What is the first step in photosynthesis:
A Generation of ATP
B Formation of NADPH
C Through light, excitement of an electron of chlorophyll pigment
D Formation of Glucose

Answer: Through light, excitement of an electron of chlorophyll pigment
16 Due to which reaction PGA is changed into phosphoglyceraldehyde in photosynthesis process?
A Oxidation
B Reduction
C Electrolysis
D Hydrolysis

Answer:Reduction
17 What will be the ratio of oxygen produced to that of consumed in daylight hours when the rate of respiration is less than that of photosynthesis?
A 1: 1
B 10: 1
C 50: 1
D 5: 1

Answer: 10: 1
18 In Photosynthesis process, how many molecules of NADPH and ATP are required to reduce six molecules of carbon dioxide to glucose?
A 3 ATP and 2 NADPH
B 6 ATP and 6 NADPH
C 12 ATP and 18 NADPH
D 18 ATP and 12 NADPH

Answer:18 ATP and 12 NADPH
19 Mention the internal factors that influence photosynthesis?
A Size, position and structure of stomata
B Maintenance of the turgidity of the leaf cells
C Relative proportion and distribution of chloroplasts in the mesophyll
D All of the above

Answer: All of the above
20 Name the external factors that affect photosynthesis process?
A Light Intensity
B Carbon dioxide concentration
C Temperature
D All of the above

Answer: All of the above

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