Is involved only in cyclic photophosphorylation

Has a reaction center which absorbs the 600nm light

Is not present in cyanobacteria

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NEET • BIOLOGY • PHOTOSYNTHESIS IN HIGHER PLANTS

Photosynthesis in higher plants practice · Mixed difficulty

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61 Hard

61 of 194

Understanding +4 | -1

The oxygenation activity of RuBisCO enzyme in photorespiration leads to the formation of

View answer and explanation

Correct option: D

1 molecule of 3-C compound

Option D (1 molecule of 3-C compound) is correct because the oxygenation of RuBP by RuBisCO in photorespiration results in one molecule of 3-phosphoglycerate (3-C) and one molecule of 2-phosphoglycolate (2-C).

62 Medium

62 of 194

Remembering +4 | -1

Hill reaction occurs in

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Correct option: D

Presence of ferricyanide

Option D (Presence of ferricyanide) is correct because Hill reaction, the light-dependent oxidation of water, can occur in isolated chloroplasts in the presence of a suitable electron acceptor like ferricyanide.

63 Hard

63 of 194

Remembering +4 | -1

Number of the protons required to synthesized one ATP during chemiosmosis?

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Correct option: B

Option B (4) is the correct answer because approximately 4 protons are required to synthesize one ATP molecule during chemiosmosis in chloroplasts.

64 Easy

64 of 194

Understanding +4 | -1

Under normal condition, which one of the following is a major limiting factor?

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Correct option: B

C{O_2}

Option B (

C{O_2}

) is correct because, under normal conditions, the concentration of carbon dioxide in the atmosphere is often a limiting factor for photosynthesis, especially in C3 plants.

65 Easy

65 of 194

Understanding +4 | -1

Conditions helpful in photorespiration are

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Correct option: A

More oxygen and less carbon dioxide

Option A (More oxygen and less carbon dioxide) is correct because high oxygen and low carbon dioxide concentrations favor photorespiration.

66 Hard

66 of 194

Remembering +4 | -1

Which of the following is synthesized in the dark-reaction of photosynthesis?

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Correct option: D

PGA

Option D (PGA) is correct because PGA (3-phosphoglycerate) is synthesized during the carbon fixation stage of the dark reactions (Calvin cycle).

67 Medium

67 of 194

Analyzing +4 | -1

Find the incorrect statements with reference to calvin cycle :-
(a) The primary acceptor of CO is a 5-carbon ketose sugar.
(b) Calvin cycle does not occur in

{C_4}

and CAM plants.
(c) 6-turns of calvin cycle are required to produce one molecule of Hexose sugar.
(d) Sequence of stages of calvin cycle are carboxylation, regeneration and reduction.

View answer and explanation

Correct option: C

b and d

The correct answer is B (a, b and d) because these statements are incorrect about the Calvin cycle.

68 Easy

68 of 194

Understanding +4 | -1

Plants which show double carboxylation in two different types of cells in leaves

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Correct option: C

Also show Kranz anatomy

Option C (Also show Kranz anatomy) is correct because double carboxylation in different cells is a characteristic of C4 plants, which also exhibit Kranz anatomy.

69 Medium

69 of 194

Understanding +4 | -1

In a CAM-plant, the concentration of organic acid

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Correct option: C

Increases during night

Option C (Increases during night) is correct because in CAM plants, organic acids are synthesized and stored during the night.

70 Medium

70 of 194

Analyzing +4 | -1

Assertion (A): In

C_4

plants, two carboxylations and one decarboxylation occurs during photosynthesis.

Reason (R):

{C}_4

Plants, show kranz anatomy in all parts.

View answer and explanation

Correct option: C

Assertion is true but Reason is false

Option C (Assertion is true but Reason is false) is correct because C4 plants do have two carboxylations and one decarboxylation, but Kranz anatomy is present only in leaves, not in all parts of the plant.

71 Easy

71 of 194

Understanding +4 | -1

Which one is essential for the respiration as well as photosynthesis?

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Correct option: D

Cytochrome

Option D (Cytochrome) is correct because cytochromes are essential components of both the electron transport chain in respiration and the photosynthetic electron transport chain.

72 Easy

72 of 194

Understanding +4 | -1

The internal factors that affects photosynthesis of plant depends on the

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Correct option: B

Genetic predisposition

Option B (Genetic predisposition) is correct because internal factors affecting photosynthesis are primarily determined by the plant's genetic makeup, influencing enzyme activity, chlorophyll content, and other physiological traits.

73 Medium

73 of 194

Remembering +4 | -1

Warburg effect is the

View answer and explanation

Correct option: C

Inhibition of

{C_3} -

cycle by

{O_2}

Option C (Inhibition of

{C_3} -

cycle by

{O_2}

) is correct because the Warburg effect describes the reduction in the rate of photosynthesis in

{C_3}

plants due to high oxygen concentrations.

74 Medium

74 of 194

Application +4 | -1

How many calvin cycles are required to produce 5 molecules of glucose?

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Correct option: C

The correct answer is C (30) because 6 Calvin cycles are required to produce one molecule of glucose, therefore 5 molecules require 30 cycles.

75 Easy

75 of 194

Understanding +4 | -1

Light energy in photosynthesis is utilized in

View answer and explanation

Correct option: B

ADP converted into ATP

Option B (ADP converted into ATP) is correct because light energy in photosynthesis is utilized to convert ADP into ATP during photophosphorylation.

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76 Hard

76 of 194

Remembering +4 | -1

NADP reductase enzyme can be found on:-

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Correct option: A

Stroma side of thylakoid membrane

Option A (Stroma side of thylakoid membrane) is correct because NADP reductase enzyme is located on the stroma side of the thylakoid membrane.

77 Medium

77 of 194

Remembering +4 | -1

PEP

carboxylase is associated with

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Correct option: D

1 and 3

Option D (1 and 3) is correct because PEP carboxylase is involved in carbon fixation in both CAM and C4 plants.

78 Easy

78 of 194

Remembering +4 | -1

By which plant pigment maximum absorption of radiation takes place in the blue and red regions of absorption spectrum?

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Correct option: A

Chlorophyll-a

Option A (Chlorophyll-a) is correct because Chlorophyll-a exhibits maximum absorption of radiation in the blue and red regions of the absorption spectrum.

79 Easy

79 of 194

Understanding +4 | -1

Choose the correctly matched pair:

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Correct option: C

Tadpole like structure - Chlorophyll

Option C (Tadpole like structure - Chlorophyll) is the correctly matched pair, as chlorophyll molecules do resemble a tadpole-like structure.

80 Easy

80 of 194

Understanding +4 | -1

Which factor is not limiting in normal condition for photosynthesis?

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Correct option: A

Air

Option A (Air) is correct because air itself is not a limiting factor for photosynthesis under normal conditions; the components of air, such as carbon dioxide, water, and light, can be limiting, but not the air itself.

81 Medium

81 of 194

Analyzing +4 | -1

Mark the odd one (with respect to internal factors affecting photosynthesis)

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Correct option: B

Light intensity

Option B (Light intensity) is correct because light intensity is an external factor, while the others are internal factors affecting photosynthesis.

82 Medium

82 of 194

Remembering +4 | -1

The membrane of thylakoid is called

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Correct option: D

Thylakoid membrane

Option D (Thylakoid membrane) is correct because the membrane surrounding the thylakoid is, by definition, the thylakoid membrane.

83 Medium

83 of 194

Remembering +4 | -1

Flow of electrons in non-cyclic photo phosphorylation is

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Correct option: D

Unidirectional (from PS-II to PS-I)

Option D (Unidirectional (from PS-II to PS-I)) is correct because in non-cyclic photophosphorylation, electrons flow unidirectionally from PS-II to PS-I.

84 Hard

84 of 194

Remembering +4 | -1

Anoxygenic photosynthesis is characteristic of

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Correct option: A

Rhodospirillum

Option A (Rhodospirillum) is correct because anoxygenic photosynthesis is a characteristic feature of this genus of bacteria.

85 Easy

85 of 194

Remembering +4 | -1

First reaction in photosynthesis is

View answer and explanation

Correct option: B

Excitation of chlorophyll molecule

Option B (Excitation of chlorophyll molecule) is correct because the initial step in photosynthesis involves the absorption of light energy by chlorophyll, leading to its excitation.

86 Medium

86 of 194

Understanding +4 | -1

The most crucial step of Calvin cycle

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Correct option: B

Is catalysed by RuBisCO

Option B (Is catalysed by RuBisCO) is correct because the carboxylation of RuBP by RuBisCO is the most crucial step in the Calvin cycle.

87 Easy

87 of 194

Understanding +4 | -1

Assertion: Sugarcane shows Kranz anatomy.
Reason: In diocot leaves, the bundle sheath cells lack
chloroplasts

View answer and explanation

Correct option: C

If the assertion is true but the reason is false

Option C (If the assertion is true but the reason is false) is correct because sugarcane does show Kranz anatomy, but dicot leaves do have chloroplasts in their bundle sheath cells.

88 Medium

88 of 194

Understanding +4 | -1

Photosystem II

View answer and explanation

Correct option: B

Is attached to Oxygen evolving complex

Option B is correct because Photosystem II is associated with the Oxygen Evolving Complex (OEC), which is responsible for splitting water molecules.

89 Easy

89 of 194

Understanding +4 | -1

Choose the correct statement.

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Correct option: C

Carboxylation of phosphoenol pyruvate results in the formation of

{C_4} -

plants

Option C (Carboxylation of phosphoenol pyruvate results in the formation of

{C_4} -

plants) is correct because the initial carbon fixation in C4 plants involves the carboxylation of phosphoenolpyruvate (PEP).

90 Medium

90 of 194

Application +4 | -1

If 36

C{O_2}

molecules are fixed in

{C_3}

plant what will be?
1) The number of G3P and
2) Erythrose – 4 – phosphate formed during the dark reaction

View answer and explanation

Correct option: D

a=72, b=12

The correct answer is D (a=72, b=12) because 36 CO2 molecules will produce 72 G3P and 12 Erythrose-4-phosphate.

Revision notes and key takeaways

Review PHOTOSYNTHESIS IN HIGHER PLANTS in your textbook or class notes, then use this set to check your understanding.

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