Question

Match the element with its associated functions/roles and choose the correct option given below.

a. Molybdenum	i. component of nitrogenase
b. Boron	ii. The splitting of H2O during photosynthesis to liberate O2
c. Manganese	iii. needed for the synthesis of auxins
d. Iron	iv. Component of ferredoxin
e. Zinc	v. Pollen germination

A. a-ii, b-i, c-iv, d-iii, e-v
B. a-iii, b-ii, c-v, d-i, e-iv
C. a-i, b-v, c-ii, d-iv, e-iii
D. a-v, b-iv, c-iii, d-i, e-ii

Answer 1

Hint:
Mineral nutrients are categorized into two types such as macronutrients and micronutrients. Macronutrients are required in large quantities. For example, sodium, potassium, calcium, etc. Micronutrients are required in smaller quantities. For example, copper, boron, manganese, molybdenum, etc.

Complete step by step answer:
Boron is one of the crucial nutrients for the optimum growth, development, and quality of crops. It has a regulatory function in pollen tube growth and pollen germination. Molybdenum is an essential component of the nitrogenase enzyme that converts nitrogen into ammonia. So it is required by symbiotic nitrogen-fixing bacteria in leguminous plants to fix atmospheric nitrogen.
Manganese is an important micronutrient needed in small amounts and plays a crucial role in photosynthesis. It sparks photosynthesis by splitting water after Photosystem II fixes light to start the conversion of carbon dioxide and water into carbohydrates. Ferredoxins are small proteins containing sulfur and iron atoms arranged as iron-sulfur clusters.
Plants need zinc for tryptophan synthesis, a key amino acid in the synthesis of the auxin indoleacetic acid.

Option ‘C’ is correct

Note:
There are seven plant nutrients required in small quantities defined as micronutrients. Those are manganese, boron, zinc, iron, molybdenum, copper, and chlorine. They are present in less than 1% of the dry weight of plants.