Question

Choose the correct statements among the following

I. Joseph Priestley (1770): Showed that plants have the ability to take CO₂ from the atmosphere and release O₂.
II. Jan Ingenhousz (1779): Release of CO₂ by plants was possible only at night and only by the non-green parts of plants.
III. Julius Von Sachs (1884): Green parts in plants produce glucose which is stored as starch.
IV. C. Van Niel (1931): Photosynthesis is essentially a light dependent reaction in which hydrogen from an oxidizable compound reduces CO₂ to form carbohydrates.

Correct statements: I, III, IV

• A. I, II
• B. I, III
• C. III, IV
• D. I, III and IV

Hint:

Match scientists with photosynthesis-related discoveries and dates to avoid confusion.

Answer 1

The Correct Option is D

I) Correct — Priestley demonstrated the release of O₂ by plants.
II) Incorrect — Ingenhousz proved that oxygen is released in presence of light, not CO₂ release at night.
III) Correct — Sachs demonstrated starch formation in green parts.
IV) Correct — Van Niel explained light-dependent reactions and CO₂ reduction.