Question

Assertion : Sulphur is the main constituent of several coenzymes, vitamins and ferredoxin.
Reason : Sulphur is present in two amino acids - valine and cysteine.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (C)

Sulphur is an important macroelement of plants. Plants obtain sulphur in the form of sulphate $(SO_4^{2-})$. Sulphur is present in two amino acids - cysteine and methionine and is the main constituent of several coenzymes, vitamins (thiamine, biotin, coenzyme $A$) and ferredoxin.