Biomolecules MCQs for NEET 2026

Biomolecules – NEET 2026 Practice MCQs

Which one of the following sets of monosaccharides forms sucrose?

α-D-galactopyranose and α-D-glucopyranose

α-D-glucopyranose and β-D-fructofuranose

β-D-glucopyranose and α-D-fructofuranose

α-D-glucopyranose and α-D-fructofuranose

The central dogma of molecular genetics states that the genetic information flows from

Amino acids → Proteins → DNA

DNA → Carbohydrates → Proteins

DNA → RNA → Proteins

DNA → RNA → Carbohydrates

Vitamin B₁₂ contains

Fe (II)

Co (III)

Zn (II)

Ca (II)

Fehling's solution 'A' is

aqueous copper sulphate

alkaline copper sulphate

alkaline solution of sodium potassium tartrate (Rochelle's salt)

aqueous sodium citrate

Which of the following is a basic amino acid?

Alanine

Tyrosine

Lysine

Serine

Number of chiral carbons in β-D-(+) glucose is

five

six

three

four

RNA and DNA are chiral molecules, their chirality is due to

chiral bases

chiral phosphate ester units

D-sugar component

L-sugar component

Mg is present in

chlorophyll

haemoglobin

vitamin-D

vitamin-B

Which is the correct statement?

Starch is a polymer of α-glucose.

Amylose is a component of cellulose.

Proteins are composed of only one type of amino acid.

In cyclic structure of fructose, there are four carbons and one oxygen.

Which of the following hormones contains iodine?

Testosterone

Adrenaline

Thyroxine

Insulin