Question

Choose the correct statements among the following:
1. Plant ash includes all carbon and inorganic elements.
2. In amino acid, an amino group and acidic group on α-carbon makes it α-amino acid.
3. Glycerol has 3 -OH groups.
4. Acid insoluble fractions are called macromolecules.
Identify the correct option from the following:

• A. I, II, III
• B. II, IV
• C. I, IV
• D. II, III, IV

Hint:

In “choose the correct statements” type questions, always validate each statement independently and eliminate incorrect ones to find the right combination.

Answer 1

The Correct Option is D

Statement I: Incorrect — Plant ash does not include carbon, as carbon gets oxidized and released as CO$_2$ during combustion. Statement II: Correct — In amino acids, the amino group and acidic group attached to the same $\alpha$-carbon make it an $\alpha$-amino acid. Statement III: Correct — Glycerol has 3 hydroxyl (-OH) groups. Statement IV: Correct — Acid insoluble fractions are generally large-sized macromolecules like proteins, polysaccharides, etc.