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Photosynthesis MCQs for NEET — Botany Questions with Answers

Practice free Photosynthesis (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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C₄plants can perform photosynthesis

Even in low light intensity

Even in low CO₂ concentration

Both 1 & 2

Only in high intensity of light and high CO₂

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Explanation

C₄ plants are adapted to efficiently perform photosynthesis even in low CO₂ concentrations. They have a specialized mechanism that concentrates CO₂ in the bundle sheath cells, minimizing photorespiration and allowing the plant to thrive in conditions where CO₂ is limited.

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Fret channel is a another name for

A. Stroma lamellae B. Intergranallamellae C. Grana lamellae D. Space present in stroma lamellae

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Bundle sheath chloroplast of C4 plants are

A. Large and agranal B. Large and granal C. Small and granal D. Smalland agranal

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Explanation

In C4 plants, the bundle sheath cells contain large chloroplasts that lack grana, hence they are agranal. This adaptation is crucial for the efficient functioning of the C4 pathway, where the Calvin cycle takes place in the bundle sheath cells.

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Which of the following cell organelles is concerned with photophosphorylation?

Plastochondria

Mitochondria

Chloroplast

Plastochondria and chloroplast

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Explanation

Photophosphorylation is the process by which ATP is formed utilizing the energy of sunlight during photosynthesis. This process occurs in the chloroplasts of plant cells.

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In photorespiration, glycolate is converted into serine and carbon dioxide in:

Mitochondria

Cholorplasts

Vacuoles

Peroxisomes

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An action spectrum of photosynthesis was first described by:

Jan Ingenhousz

Julius von Sachs

T.W. Engelmann

Cornelius van Niel

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Explanation

Read page 208, XI NCERT

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Dark reactions of photosynthesis are actually not totally independent of light as:

The initial reactions occur in the presence of light.

The reaction will be inhibited by the presence of light.

They can occur during the day as well.

They utilize the products of the light reaction.

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Explanation

Read page 209, XI NCERT

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All the following regarding the role of xanthophylls and carotenoids in photosynthesis are correct except:

They act as accessory pigments

Their peak absorption is in blue and red regions of VIBGYOR

They enable a wider range of wavelength of incoming light to be utilized for photosynthesis

They protect chlorophyll a form of photo-oxidation.

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Explanation

Read page 211, XI NCERT

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The chloroplast stroma lamella membrane:

Lack PS II as well as NADP reductase enzyme.

Lack PS II but have NADP reductase enzyme.

Lack NADP reductase enzyme but have PS II.

Have PS II as well as NADP reductase enzyme.

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Explanation

Read page 213, XI NCERT

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Which stage of the Calvin Cycle utilizes ATP?

Carboxylation

Reduction

Regeneration

Both 2 and 3

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Explanation

Read page 217, XI NCERT

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