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16. Which one of the following nutrients is a structural component of the cell wall of plants?

A. Mn

B. K

C. Ca

D. P

View Answer/Explanation

Correct Answer is C

17. The Cell Sap is –

A. a dilute solution of minerals and some organic substances in the vacuole

B. a dilute solution of minerals in water absorbed by the plant from the soil

C. a solution of different organic substances dissolved in the cytoplasm

D. exudate from the cell

View Answer/Explanation

Correct Answer is A

18. The widely used antibiotic penicillin is produced by –

A. An Algae

B. A bacterium

C. A fungus

D. None of these

View Answer/Explanation

Correct Answer is C

19. Which of the following is not a micronutrient for a plant?

A. Mg

B. Mn

C. Fe

D. Mo

View Answer/Explanation

Correct Answer is C

20. Which of the following is the product of the dark reaction of photosynthesis?

A. ATP

B. Sugar

C. NADH2

D. NADPH2

View Answer/Explanation

Correct Answer is B

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