In ${C_4}$ plants, Calvin cycle operates in the

grana of bundle sheath chloroplasts

grana of mesophyll chloroplasts

stroma of mesophyll chloroplasts

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NEET • BIOLOGY • PHOTOSYNTHESIS IN HIGHER PLANTS

Photosynthesis in higher plants practice · Hard

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31 Hard

31 of 50

Remembering +4 | -1

The pigment that appear blue green in the chromatogram is

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Correct option: A

Chlorophyll a

Option A (Chlorophyll a) is correct because Chlorophyll a appears blue-green in a chromatogram.

32 Hard

32 of 50

Understanding +4 | -1

Except for the following, all of the next is correct regarding xanthophylls and carotenoids in photosynthesis:

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Correct option: B

Maximum absorption is in the VIBGYOR blue and red range

Option B (Maximum absorption is in the VIBGYOR blue and red range) is correct because while chlorophylls absorb strongly in the blue and red regions, carotenoids and xanthophylls absorb in the blue-green region of the spectrum.

33 Hard

33 of 50

Remembering +4 | -1

The deficiency of which of these elements interrupts photolysis of water during photosynthesis?

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Correct option: A

\mathrm{Mn}

and

\mathrm{Cl}

Option A (Mn and Cl) is correct because Manganese (Mn) and Chlorine (Cl) are essential for the photolysis of water during photosynthesis.

34 Hard

34 of 50

Remembering +4 | -1

Conditions required for cyclic photophosphorylation

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Correct option: B

Aerobic condition, optimum light intensity

Option D (Aerobic condition, optimum light intensity) is incorrect. Cyclic photophosphorylation occurs under anaerobic conditions and high light intensity.

35 Hard

35 of 50

Understanding +4 | -1

C{O_2}

combines with RUBP in the presence of enzyme RUBISCO to form 3-PGA. This process of calvin cycle is included under?

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Correct option: A

Carboxylation

Option A (Carboxylation) is correct because the initial step of the Calvin cycle, where

C{O_2}

is fixed by RuBisCO to RuBP, is termed carboxylation.

36 Hard

36 of 50

Understanding +4 | -1

In photosynthesis carbon dioxide is converted to carbohydrates. It is a ...... process.

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Correct option: A

reductive

Option A is correct because carbon dioxide is reduced to carbohydrates, meaning it gains electrons, which is a reductive process.

37 Hard

37 of 50

Remembering +4 | -1

The photosynthetic pigments viz, erythrolable, chlorolable and cyanolable respectively are :

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Correct option: C

red, green, blue

Option C (red, green, blue) is correct because erythrolabe, chlorolabe, and cyanolabe are the pigments in the cones of the eye that are sensitive to red, green, and blue light, respectively.

38 Hard

38 of 50

Remembering +4 | -1

{C_4}

(sugarcane plant) plant,

14\,C{O_2}

is fixed in malic acid. Which of the following enzymes is used to fix

C{O_2}

View answer and explanation

Correct option: C

Phosphoenol pyruvic acid carboxylase

Option C (Phosphoenol pyruvic acid carboxylase) is correct because PEP carboxylase is the enzyme responsible for the initial fixation of CO2 in C4 plants.

39 Hard

39 of 50

Understanding +4 | -1

Movement of

{H^ + }

from lumen to stroma through the

{F_0}

portion of ATP ase is?

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Correct option: A

According to concentration gradient

Option A (According to concentration gradient) is correct because the movement of

{H^ + }

from the lumen to the stroma through the

{F_0}

portion of ATP synthase occurs down the concentration gradient.

40 Hard

40 of 50

Remembering +4 | -1

Electrons are picked up by an electron acceptor which passes them to an electron transport system consisting of

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Correct option: B

Cytochromes

Option B (Cytochromes) is correct because cytochromes are components of the electron transport system in photosynthesis, accepting and passing electrons.

41 Hard

41 of 50

Understanding +4 | -1

Select the incorrect statement for

\mathrm{C}_4

pathway.

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Correct option: D

Less efficient than

\mathrm{C}_3

cycle

Option D (Less efficient than

\mathrm{C}_3

cycle) is correct because the C4 pathway is actually MORE efficient than the C3 cycle, especially in hot, dry environments.

42 Hard

42 of 50

Understanding +4 | -1

Ultimate source of hydrogen atoms for the synthesis of glucose is?

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Correct option: A

{H_2}O

Option A (

{H_2}O

) is correct because water is the ultimate source of hydrogen atoms used in photosynthesis to synthesize glucose.

43 Hard

43 of 50

Remembering +4 | -1

{C_4}

plants, Calvin cycle operates in the

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Correct option: A

stroma of bundle sheath chloroplasts

Option A (stroma of bundle sheath chloroplasts) is correct because the Calvin cycle occurs in the stroma of bundle sheath cells in C4 plants.

44 Hard

44 of 50

Understanding +4 | -1

In the bundle sheath cells of

{C}_4

plant the intracellular concentration of

{CO}_2

is increased by

View answer and explanation

Correct option: A

Breakdown of

{C}_4

acid in bundle sheath cells

Option A (Breakdown of

{C}_4

acid in bundle sheath cells) is correct because the breakdown of

C_4

acids in bundle sheath cells releases

CO_2

, increasing its concentration.

45 Hard

45 of 50

Remembering +4 | -1

In kranz anatomy, the bundle sheath cells have?

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Correct option: C

Thick walls, no intercellular spaces and large number of chloroplast

Option C (Thick walls, no intercellular spaces and large number of chloroplast) is correct because bundle sheath cells in Kranz anatomy have these characteristics to facilitate efficient CO2 fixation.

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46 Hard

46 of 50

Analyzing +4 | -1

2\left( {{C_{51}}{H_{98}}{O_6}} \right) + A \to B + 98\,{H_2}O +

energy, here what is refers A and B?

View answer and explanation

Correct option: B

A-145

{O_2}

, B-102

C{O_2}

Option B (A-145

{O_2}

, B-102

C{O_2}

) is correct because it represents the balanced stoichiometric coefficients for the complete combustion of the given compound.

47 Hard

47 of 50

Remembering +4 | -1

In Z - scheme, Z - shape is formed when

View answer and explanation

Correct option: C

Carriers are placed in sequence on a redox potential scale

Option C (Carriers are placed in sequence on a redox potential scale) is correct because the Z-scheme represents the electron transport chain in photosynthesis, where electron carriers are arranged based on their redox potentials.

48 Hard

48 of 50

Remembering +4 | -1

Light reaction of photosynthesis form

View answer and explanation

Correct option: D

NADPH_2

O_2

and ATP

Option D (

NADPH_2

O_2

and ATP) is correct because the light reactions of photosynthesis produce NADPH2, oxygen, and ATP.

49 Hard

49 of 50

Remembering +4 | -1

Dark reactions of photosynthesis occur in

View answer and explanation

Correct option: C

stroma outside photosynthetic lamellae

Option C (stroma outside photosynthetic lamellae) is correct because the dark reactions (Calvin cycle) occur in the stroma of the chloroplast, which is outside the thylakoid membranes.

50 Hard

50 of 50

Analyzing +4 | -1

Assertion (A): It is possible to make calculations of the net gain of ATP for every glucose molecule oxidised; but in reality this can remain only a theoretical exercise.

Reason (R): These calculations can be made only on certain assumptions that are not really valid in a living system.

View answer and explanation

Correct option: A

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Option A (Both (A) & (R) are true and the (R) is the correct explanation of the (A)) is correct because calculating the net ATP gain is theoretical due to assumptions about living systems that don't always hold true.

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