Question

Match the following and choose the correct combination from the options given.

Column I	Column II
A. Potassium	1. Constituent of ferredoxin
B. Sulphur	2. Involved in stomatal movement
C. Molybdenum	3. Needed in the synthesis of auxin
D. Zinc	4. Component of nitrogenase

• A. A- 2, B- 1, C- 4, D- 3
• B. A- 1, B- 2, C- 3, D- 4
• C. A- 4, B- 3, C- 2, D- 1
• D. A- 1, B- 3, C- 4, D- 2
• E. A- 3, B- 4, C- 1, D- 2

Answer 1

Answer: (A)

A- 2, B- 1, C- 4, D- 3

Potassium and sulphur are essential macronutrients, while molybdenum and zinc are essential micronutrients for plants. According to the most widely accepted theory of stomatal movement, potassium is essential for turgor movement of guard cells.

Ferredoxin is a component of light reaction in plants and is an iron sulphur protein.

Nitrogenase enzyme is found in bacteria and is a molybdo-flavo protein.

Zinc is required for auxin biosynthesis in plants.