Sample Questions — what do we know?
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MCQ
Why are green plants considered autotrophs?
✅ Correct Answer: B
Green plants synthesize their own food using light energy in a process called photosynthesis, hence they are autotrophs.
MCQ
Assertion (A): Oxygen released during photosynthesis is vital for all living beings.
Reason (R): Oxygen is used in respiration by plants only.
✅ Correct Answer: C
Oxygen is released during photosynthesis and is used by all aerobic organisms, not just plants.
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MCQ
Which pigment is necessary for photosynthesis to occur?
✅ Correct Answer: A
Chlorophyll is the green pigment required for photosynthesis.
MCQ
Why do only green parts of the leaf test positive for starch after light exposure?
✅ Correct Answer: D
Only green regions with chlorophyll can capture light energy and synthesize starch.
MCQ
How does the test with the black-paper-covered leaf portion support the light requirement in photosynthesis?
✅ Correct Answer: C
The leaf area that was covered did not receive light and thus failed to show starch formation.
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