ICSE Class 10 Photosynthesis — Mock Test (2027)
Free online mock test for Photosynthesis (ICSE Class 10 Biology) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Photosynthesis chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.What role do carotenoids play in photosynthesis?
- a.They produce oxygen
- b.They absorb and transfer light energy to chlorophyll
- c.They convert light energy into chemical energy
- d.They break down chlorophyll
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2.Match the following:
Light reaction Dark reaction Light reaction occurs in the thylakoids/grana of the chloroplast. Dark reaction occurs in the stroma of the chloroplast. -
3.The diagram shows a plant shoot and the same shoot five hours later.
Which change in environmental conditions could cause this change in the shoot?- A.A decrease in available water
- B.A decrease in light intensity
- C.A decrease in wind speed
- D.An increase in humidity
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4.To show that chlorophyll is necessary for photosynthesis, the following steps are performed: - Take a plant with variegated leaves (e.g., Coleus). - Destarch the leaves by keeping the plant in a dark room for a few days. - Place the plant in the sun for a few hours. - Pluck a leaf, make its outline, and mark the green and non-green areas. - Test the leaf for starch using iodine solution. In the diagram below, which labeled part of the leaf will show a positive starch test (blue-black color) after the iodine treatment?
- A.Only the green areas of the leaf will turn blue-black.
- B.Only the non-green areas of the leaf will turn blue-black.
- C.Both green and non-green areas will turn blue-black equally.
- D.Neither green nor non-green areas will show any color change.
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5.Where do the light reaction and dark reaction of photosynthesis occur in the chloroplast?
- A.Light reaction: granal thylakoids; Dark reaction: stroma
- B.Light reaction: stroma; Dark reaction: granal thylakoids
- C.Both occur in the granal thylakoids
- D.Both occur in the chloroplast membrane
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