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Photosynthesis in Higher Plants Practice Questions

Class 11 · Biology · 2033 free MCQs with instant results and detailed explanations.

2033
Total
618
Easy
1009
Medium
406
Hard

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Topics in Photosynthesis in Higher Plants

C4 Pathway 497
Calvin Cycle 516
Light Reaction 543
Photorespiration 477

Sample Questions from Photosynthesis in Higher Plants

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which pigment is primarily responsible for absorbing light energy during the light reaction of photosynthesis?
A. Chlorophyll a
B. Carotenoids
C. Xanthophylls
D. Chlorophyll b
Show Answer & Explanation
Correct Answer: A
Chlorophyll a is the main pigment that absorbs light energy, particularly in the blue and red wavelengths, essential for the light reaction.
Q2
Easy
In the light reaction of photosynthesis, ATP is produced through a process known as what?
A. Photophosphorylation
B. Oxidation
C. Carbon Fixation
D. Hydrolysis
Show Answer & Explanation
Correct Answer: A
Photophosphorylation is the process by which ATP is generated during the light reaction in chloroplasts using light energy.
Q3
Easy
What is the primary pigment involved in the light reactions of photosynthesis?
A. Chlorophyll a
B. Carotene
C. Xanthophyll
D. Chlorophyll b
Show Answer & Explanation
Correct Answer: A
Chlorophyll a is the main pigment that absorbs light energy for photosynthesis.
Q4
Medium
What is the role of water in the light reactions of photosynthesis?
A. Source of oxygen
B. Electron donor
C. Energy supplier
D. All of the above
Show Answer & Explanation
Correct Answer: D
Water provides electrons, produces oxygen, and is involved in the energy process during light reactions.
Q5
Medium
Which molecule is produced as a result of photolysis of water during the light reaction?
A. Glucose
B. Oxygen
C. NADPH
D. ATP
Show Answer & Explanation
Correct Answer: B
Photolysis of water generates oxygen as a byproduct during light reactions.
Q6
Medium
What is the main function of the photosystems in the light reactions?
A. Synthesizing glucose
B. Capturing light energy
C. Releasing oxygen
D. Fixing carbon dioxide
Show Answer & Explanation
Correct Answer: B
Photosystems are complexes that capture and convert light energy into chemical energy.
Q7
Medium
Which of the following best describes the Z-scheme of photosynthesis?
A. Linear flow of electrons
B. Cyclic flow of electrons
C. Non-cyclic flow of carbon
D. No flow of electrons
Show Answer & Explanation
Correct Answer: A
The Z-scheme represents the linear flow of electrons through photosystems I and II.
Q8
Hard
Which of the following is the primary pigment involved in the light reactions of photosynthesis?
A. Chlorophyll a
B. Carotenoids
C. Xanthophyll
D. Chlorophyll b
Show Answer & Explanation
Correct Answer: A
Chlorophyll a is the main pigment that absorbs light energy and initiates the light reactions.
Q9
Hard
In which part of the chloroplast do the light reactions take place?
A. Stroma
B. Thylakoid membrane
C. Outer membrane
D. Inner membrane
Show Answer & Explanation
Correct Answer: B
The thylakoid membranes of the chloroplast contain the machinery for the light reactions.
Q10
Hard
What is the main product of the light reaction in photosynthesis?
A. Glucose
B. Oxygen
C. NADPH
D. ATP
Show Answer & Explanation
Correct Answer: B
The light reactions produce oxygen as a byproduct when water is split during photolysis.

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Photosynthesis in Higher Plants — Class 11 Biology Practice Questions Online

This page contains 2033 practice MCQs for the chapter Photosynthesis in Higher Plants in Class 11 Biology. The questions are organized by difficulty — 618 easy, 1009 medium, 406 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.