Photosynthesis MCQs Quiz: 05 3


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Free online interactive MCQs test on ‘ Photosynthesis ‘ with instant answers and reporting. Test # 05

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Photosynthesis: MCQs Quiz - 5

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Question 1
Which one of the following is wrong in relation to photorespiration:
A
It is a characteristic of C4 plants
B
It is a characteristic of C3 plants
C
It occurs in daytime only
D
It occurs in chloroplasts
Question 2
Best defined function of Manganese in green plants is
A
Photolysis of water
B
Water absorption
C
Nitrogen fixation
D
Calvin cycle
Question 3
The enzyme responsible for primary carboxylation in C3 plants is
A
Pyruvate carboxylase
B
Succinic dehydrogenase
C
Hexokinase
D
RuBP carboxylase oxygenase
Question 4
In C3 plants, the first stable compound formed after CO2 fixation is
A
Oxaloacetic acid
B
Malic acid
C
Phosphoglyceraldehyde
D
3-phosphoglycerate
Question 5
Chemiosmosis hypothesis given by Peter Mitchel proposes the mechanism of
A
synthesis of NADH
B
synthesis of ATP
C
synthesis of FADH2
D
synthesis of NADPH
Question 6
The ratio between 2-carbon and 3-carbon intermediates having —NH2 group formed in photosynthetic oxidation cycle is:
A
1 : 1
B
2 : 1
C
3 : 2
D
3 : 4
Question 7
In sugarcane plant, 14CO2 is fixed in malic acid, in which the enzyme that fixes CO2 is:
A
Ribulose phosphate kinase
B
Phosphoenolpyruvic acid carboxylase
C
Ribulose biphosphate carboxylase
D
Fructose phosphatase
Question 8
In higher plants, continuity of cytoplasm from one cell to its neighbouring cells is established through
A
Apoplast
B
Chloroplast
C
Leucoplast
D
Symplast
Question 9
In CAM plants, CO2 required for photosynthesis enters the plant body during
A
Daytime through the lenticels
B
Night when the hydathodes are open
C
Daytime when the stomata are open
D
Night through the stomata which are kept open
Question 10
In a CAM plant the concentration of organic acid
A
increases during the day
B
decreases or increases during the day
C
increases during night
D
decreases during any time
Question 11
Ganong’s respiroscope is used to demonstrate
A
production of carbon dioxide during aerobic respiration.
B
evolution of carbon dioxide during fermentation.
C
evolution of oxygen during photosynthesis.
D
production of heat during aerobic respiration.
Question 12

Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a - e) make it useful as a storage material?

(a) Easily translocated

(b) Chemically non-reactive

(c) Easily digested by animals

(d) Osmotically inactive

(e) Synthesized during photosynthesis

The useful properties are:

A
(a) and (e)
B
(b) and (c)
C
(b) and (d)
D
(a), (c) and (e)
Question 13
Match the phenomenon listed under column I with those listed under column II. Select the correct answer from the options given.
  Column I   Column II
A Warburg effect p Change in gene frequency by chance
B Pasteur effect q Postponing severance in the leaves by applying cytokinin
C Emerson effect r Decline in the consumption of respiratory substrate due to a change from anaerobic to aerobic respiration
D Wright effect s Inhibitory effect of O2 on photosynthesis
    t Enhancement of photosynthesis by subjecting chlorophyll to the effect two different wavelengths of light
A
A = s, B = t, C = q, D = r
B
A = s, B = r, C = t, D = p
C
A = t, B =s, C = p, D = q
D
A= t, B = r, C = p, D = s
Question 14

Assertion: Rhoeo leaves contain anthocyanin pigments in epidermal cells.

Reason: Anthocyanins are accessory photosynthetic pigments.

A
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B
Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
C
Assertion is true statement but Reason is false
D
Assertion and Reason are false statements
Question 15
Photosynthesis cannot continue for long if during light reaction, only cyclic photophosphorylation takes place. This is because
A
Only ATP is formed NADPH+ + H+ is not formed
B
There is no evolution of O2
C
There is unidirectional cyclic movement of the electrons
D
Photosystem I stops getting excited at a wavelength of light beyond 680 nm
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