Question

Glucosinolates protect _________ plant from pest attack.

• A. tomato
• B. soyabean
• C. cabbage
• D. cotton

Hint:

Glucosinolates are secondary metabolites typical of the mustard family, to which cabbage belongs.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Glucosinolates are sulphur and nitrogen containing secondary metabolites typical of the mustard family (Brassicaceae).

Step 2: How they protect
When insects chew the tissue, the enzyme myrosinase breaks them into pungent, toxic isothiocyanates that repel or poison the pest.

Step 3: Choose the plant
Of the plants listed, only cabbage belongs to this family. Tomato is a solanaceous plant, soyabean a legume and cotton a malvaceous plant.

Final Answer:
Glucosinolates protect the cabbage plant from pests. \[ \boxed{\text{(C) }\text{cabbage}} \]