Photosynthesis MCQs Quiz: 04 6


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Photosynthesis: MCQs Quiz - 4

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Question 1
In photosystem-I, the first electron acceptor is
A
Plastocyanin
B
Cytochrome
C
Ferredoxin
D
An iron sulphur protein
Question 2
Both photosynthesis and respiration require
A
Chloroplasts
B
Sunlight
C
Mitochondria
D
Cytochromes
Question 3
Bacterial photosynthesis involves
A
PS I only
B
PS II only
C
Both PS I and PS II
D
Either PS I or PS II
Question 4
As compared to a C3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4-plants
A
Zero
B
Two
C
Six
D
Twelve
Question 5
A process that makes important difference between C3 and C4 plants is
A
Transpiration
B
Photorespiration
C
Photosynthesis
D
Glycolysis
Question 6
A plant with low CO2 compensation point is:
A
Gossypium hirsutum
B
Leucopoa kingii
C
Atriplex patula
D
Tidestromia Oblongifolia
Question 7
Which one of the following is not true about the light reactions of photosynthesis?
A
NADPH is not produced in cyclic electrons transport in light reactions.
B
The flow of electrons from water to NADP in non-cyclic electron transport produces one ATP
C
Reactions of the two photosystems are needed for the reduction of NADP
D
P680 and P700 are the reaction centres of PS I an PS II respectively reactions
Question 8
Which of the following statements regarding C4 plants is false?
A
The primary CO2 acceptor is a 5 carbon molecule
B
The initial carboxylation reaction occurs in mesophyll
C
The leaves that fix CO2 have two cell types
D
The mesophyll cells lack RuBisCO enzyme
Question 9
Which of the following is WRONGLY matched?
A
Sorghum – Kranz anatomy
B
PEP carboxylase – Mesophyll cells
C
Blackman – Law of limiting factors
D
PS II – P700
Question 10
The synthesis of one molecule of glucose during Calvin cycle requires
A
6 molecules of ATP and 12 molecules of NADPH2
B
12 molecules each of ATP and NADPH2
C
12 molecules of ATP and 18 molecules of NADPH2
D
18 molecules of ATP and 12 molecules of NADPH2
Question 11
The pathway that will produce oxygen during photosynthesis is:
A
electron transport pathway
B
noncyclic electron pathway
C
light-independent reactions
D
cyclic electron pathway
Question 12
The net requirement of assimilator power for the formation of 6 hexose molecules in maize plant is
A
180 ATP, 72 NADPH
B
108 ATP,72 NADPH
C
90 ATP, 60 NAQPH
D
72 ATP, 48 NADPH
Question 13
RuBisCO stands for
A
Ribulose phosphate carboxylic oxygenase
B
Ribulose phosphate carboxylase oxygenase
C
Ribulose bisphosphate carboxylase oxygenase
D
None of the above
Question 14

Read the following four statements, A, B, C and D and select the right option having both correct statements.

STATEMENTS :

(A) Z scheme of light reaction takes place in presence of PS I only.

(B) Only PS I is functional in cyclic photophosphorylation.

(C) Cyclic photophosphorylation results into synthesis of ATP and NADPH2

(D) Stroma lamellae lack PS II as well as NADP. Options :

A
B and D
B
A and B
C
B and C
D
C and D
Question 15
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
A
Effective pumping of CO2 into bundle sheath cells
B
Rubisco in C4 plants has higher affinity for CO2
C
Four carbon acids are the primary initial CO2 fixation products
D
The primary fixation of CO2 is mediated via PEP carboxylase
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6 thoughts on “Photosynthesis MCQs Quiz: 04

  • prabhat

    sir 18 atp are requird for one glucose then how u can say 30 ?

  • AMAR HOSSAIN

    Sir, would you please send me the explanation of question no. 12

    • mariyam siddiqui

      maize is a c4 plant n in c4 plant, 30ATP n 12NADPH r required for formation of 1 glucose molecule. therefore for 6 glucose molecule 6*30=180ATP n 6*12=72NADPH is required

    • Anantg

      18 ATP and 12 NADPH required in C3 cycle for the synthesis of 1 hexose. For a C4 plant 12 additional ATPs are required to pump 6 CO2 to bundle sheath cells for C3 cycle..