Sample Questions — Early experiments
Try 5 questions below from Early experiments. Get all 20 in the MedicNEET app.
MCQ
What did Priestley observe when a candle burned in a closed bell jar?
✅ Correct Answer: D
Priestley observed that a candle burning in a closed space gets extinguished, indicating something was removed from air.
MCQ
Why was starch used as an indicator in Sachs' experiment?
✅ Correct Answer: D
Presence of starch confirms glucose formation via photosynthesis.
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MCQ
What did Sachs demonstrate in his experiment?
✅ Correct Answer: A
Sachs showed that glucose is made in green parts and stored as starch.
MCQ
Which part of a leaf tests positive for starch in Sachs' experiment?
✅ Correct Answer: C
Only the green regions produced starch as they contain chlorophyll for photosynthesis.
MCQ
How was van Niel's hypothesis confirmed later?
✅ Correct Answer: D
Use of heavy isotope of oxygen confirmed that Oâ‚‚ evolved from water.
Practice All 20 Questions from Early experiments
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