Chapter Exam

Chapter 11: Photosynthesis in Higher Plants — Online MCQ Test

Q: Which pigment is directly involved in the conversion of light energy into chemical energy during photosynthesis?

Answer: A. Chlorophyll a — Chlorophyll a is the primary photosynthetic pigment and the reaction centre in both photosystems. It directly participates in the conversion of light energy.

Q: The site of light reaction in higher plants is the:

Answer: B. Thylakoid membrane — The light reactions occur on the thylakoid membranes of chloroplasts, where photosystems and electron transport components are located.

Q: Which statement correctly describes photosystem II?

Answer: B. It contains P680 reaction centre — Photosystem II has the reaction centre P680 and is the first photosystem to act in non-cyclic electron flow.

Q: In a C4 plant, the Calvin cycle occurs mainly in:

Answer: B. Bundle sheath cell chloroplasts — In C4 plants, the Calvin cycle is localized in bundle sheath cells, where CO2 is released from C4 acids and then fixed by RuBisCO.

BIOLOGY · CLASS 11 FIRST PUC · Karnataka State Board

Practice Chapter 11: Photosynthesis in Higher Plants with a free chapter-wise online MCQ test for Karnataka State Board CLASS 11 FIRST PUC BIOLOGY. This chapter covers: Photosynthesis Chlorophyll Light Reaction Dark Reaction Calvin Cycle C3 Pathway C4 Pathway Carbon Fixation Stomata. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11: Photosynthesis in Higher Plants — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 11 FIRST PUC BIOLOGY — Chapter 11: Photosynthesis in Higher Plants, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which pigment is directly involved in the conversion of light energy into chemical energy during photosynthesis?

A. Chlorophyll a ✓
B. Carotene
C. Xanthophyll
D. Anthocyanin

Answer: A. Chlorophyll a
Chlorophyll a is the primary photosynthetic pigment and the reaction centre in both photosystems. It directly participates in the conversion of light energy.

The site of light reaction in higher plants is the:

A. Stroma
B. Thylakoid membrane ✓
C. Outer chloroplast membrane
D. Cytoplasm

Answer: B. Thylakoid membrane
The light reactions occur on the thylakoid membranes of chloroplasts, where photosystems and electron transport components are located.

Which statement correctly describes photosystem II?

A. It contains P700 reaction centre
B. It contains P680 reaction centre ✓
C. It is present only in stroma
D. It produces carbon dioxide

Answer: B. It contains P680 reaction centre
Photosystem II has the reaction centre P680 and is the first photosystem to act in non-cyclic electron flow.

A plant showing Kranz anatomy is most likely to have which characteristic?

A. Specialized bundle sheath cells surrounding vascular bundles ✓
B. Absence of chloroplasts in leaves
C. No need for carbon dioxide
D. Only CAM-type fixation

Answer: A. Specialized bundle sheath cells surrounding vascular bundles
Kranz anatomy is typical of C4 plants and shows bundle sheath cells arranged in a wreath-like manner around the vascular bundle.

In a C4 plant, the Calvin cycle occurs mainly in:

A. Mesophyll cell cytoplasm
B. Bundle sheath cell chloroplasts ✓
C. Xylem vessels
D. Guard cells

Answer: B. Bundle sheath cell chloroplasts
In C4 plants, the Calvin cycle is localized in bundle sheath cells, where CO2 is released from C4 acids and then fixed by RuBisCO.