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NEET • BIOLOGY • PHOTOSYNTHESIS IN HIGHER PLANTS

Photosynthesis in higher plants practice · Mixed difficulty

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Showing 181-194 of 194 questions

181 Easy

181 of 194

Remembering +4 | -1

The main photosynthetic pigments in the plants are

View answer and explanation

Correct option: C

Chlorophyll-b and chlorophyll-a

Option C (Chlorophyll-b and chlorophyll-a) is correct because chlorophyll-a and chlorophyll-b are the main photosynthetic pigments in plants.

182 Hard

182 of 194

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.

183 Hard

183 of 194

Remembering +4 | -1

In Z - scheme, Z - shape is formed when

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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.

184 Medium

184 of 194

Remembering +4 | -1

Within the chloroplast, there is the membranous system consisting of
I. grana
II. stroma lamellae
III. fluid stroma
Choose the correct option

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Correct option: A

I and II

Option A (I and II) is correct because grana and stroma lamellae are the membranous systems within the chloroplast, while the stroma is the fluid.

185 Hard

185 of 194

Remembering +4 | -1

Light reaction of photosynthesis form

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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.

186 Easy

186 of 194

Understanding +4 | -1

Which chemical compound/molecule supplies electrons continuously to PS-II?

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Correct option: C

{H_2}O

Option C (

{H_2}O

) is correct because water is the source of electrons for Photosystem II, which are released during photolysis.

187 Easy

187 of 194

Understanding +4 | -1

During

\mathrm{CO}_2

fixation of photosynthesis, Oxaloacetic acid is formed in which cells?

View answer and explanation

Correct option: C

Mesophyll cells of both CAM plants and

\mathrm{C}_4

plants

Option C (Mesophyll cells of both CAM plants and

\mathrm{C}_4

plants) is correct because oxaloacetic acid is initially formed in the mesophyll cells of both CAM and C4 plants during CO2 fixation.

188 Medium

188 of 194

Analyzing +4 | -1

I. The electrons that carriers photophosphorylation are located in the thylakoid membrane
II. During photophosphorylation, the chloroplast stroma becomes more acidic than the interior of thylakoid membrane
III. Protons diffuses through the protein channels which are ATP synthetase molecules
IV. ATP is formed from ADP + Pi on the stroma side of the thylakoid in the chloroplast
V. During photophosphorylation, water ionises to form

{H^ + }

, yielding electrons to PS-II
Which of the following statement are false?

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Correct option: D

Only II

Option D (Only II) is correct because during photophosphorylation, the thylakoid lumen becomes more acidic, not the stroma.

189 Medium

189 of 194

Remembering +4 | -1

{C_3}

-plants, the first stable compound formed after carbon dioxide fixation is

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Correct option: D

3-phosphoglycerate

Option D (3-phosphoglycerate) is correct because 3-phosphoglycerate (3-PGA) is the first stable compound formed after carbon dioxide fixation in C3 plants.

190 Easy

190 of 194

Remembering +4 | -1

Maximum photosynthesis occurs in

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Correct option: A

Red light

Option A (Red light) is correct because chlorophyll absorbs red and blue light most effectively, with red light generally leading to higher rates of photosynthesis.

191 Hard

191 of 194

Remembering +4 | -1

Dark reactions of photosynthesis occur in

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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.

192 Hard

192 of 194

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.

193 Medium

193 of 194

Understanding +4 | -1

The movement of electrons in ETC in light reaction is?

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Correct option: B

Down hill in terms of redox reaction

Option B (Down hill in terms of redox reaction) is correct because the electron transport chain involves a series of redox reactions where electrons move from higher to lower energy levels.

194 Easy

194 of 194

Remembering +4 | -1

Which photosystem is involved in cyclic photophosphorylation?

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Correct option: B

PS-I

Option B (PS-I) is correct because cyclic photophosphorylation involves only Photosystem I.

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