Biomolecules

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Biomolecules — solved practice questions

6 NEET Biology questions with step-by-step solutions. Attempt each, then reveal the answer.

1. Q1easy

   The building blocks (monomers) of proteins are:

   • Aglucose units
   • Bamino acids
   • Cfatty acids
   • Dnucleotides
   Show answer & solution

   Correct answer: (B) amino acids

   Proteins are made of amino acids joined by peptide bonds.

2. Q2medium

   The monomers of nucleic acids (DNA and RNA) are:

   • Aamino acids
   • Bnucleotides
   • Cglucose
   • Dglycerol
   Show answer & solution

   Correct answer: (B) nucleotides

   Nucleic acids are polymers of nucleotides.

3. Q3easy

   Which biomolecule is the body's main immediate source of energy?

   • Aproteins
   • Bcarbohydrates
   • Cvitamins
   • Dminerals
   Show answer & solution

   Correct answer: (B) carbohydrates

   Carbohydrates (like glucose) are the main energy source.

4. Q4medium

   Enzymes are chemically which type of biomolecule?

   • Acarbohydrates
   • Blipids
   • Cproteins
   • Dnucleic acids
   Show answer & solution

   Correct answer: (C) proteins

   Almost all enzymes are proteins (a few are RNA).

5. Q5hard

   Which element is present in proteins but generally absent in carbohydrates and fats?

   • Acarbon
   • Bhydrogen
   • Coxygen
   • Dnitrogen
   Show answer & solution

   Correct answer: (D) nitrogen

   Proteins contain nitrogen (in the amino groups); carbohydrates and fats are mainly C, H and O.

6. Q6medium

   Starch and cellulose are examples of:

   • Aproteins
   • Bcarbohydrates
   • Clipids
   • Dnucleic acids
   Show answer & solution

   Correct answer: (B) carbohydrates

   Both are polysaccharides — large carbohydrates made of many glucose units.

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