Start learning →

COMEDK Biomolecules — practice questions

Explore 9 free Biomolecules questions in COMEDK Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise Biomolecules with Quill →

Biomolecules questions and exercises with answers

Showing questions 1–9 of 9.

Carbohydrates that cannot be hydrolyzed to simpler sugar units are:Read the answer and worked solution →The molecular formula of glucose is:Read the answer and worked solution →Building block (monomer) of starch:Read the answer and worked solution →A protein's primary structure refers to:Read the answer and worked solution →Nucleic acids are composed of nucleotides, each containing:Read the answer and worked solution →Amino acids exist predominantly as zwitterions (⁺NH₃-CHR-COO⁻) at:Read the answer and worked solution →Number of H-bonds in A-T vs G-C base pair:Read the answer and worked solution →D-glucose and D-mannose are epimers. Differ in configuration at:Read the answer and worked solution →Vitamin B12 contains which metal at its center?Read the answer and worked solution →

Worked practice questions

Carbohydrates that cannot be hydrolyzed to simpler sugar units are:

  1. Polysaccharides
  2. Monosaccharides (e.g., glucose, fructose)
  3. Oligosaccharides
  4. Disaccharides
Show answer and solution

Correct answer: B. Monosaccharides (e.g., glucose, fructose)

**Monosaccharides:** simplest sugars, cannot be further hydrolyzed. **Examples:** glucose, fructose, ribose. Building blocks of larger carbohydrates.

Open this question →

The molecular formula of glucose is:

  1. C₁₂H₂₂O₁₁
  2. C₆H₁₂O₆
  3. C₅H₁₀O₅
  4. C₆H₁₀O₅
Show answer and solution

Correct answer: B. C₆H₁₂O₆

**Glucose:** C₆H₁₂O₆ (aldohexose). Fructose has same formula (ketohexose) — they are constitutional isomers. Sucrose: C₁₂H₂₂O₁₁.

Open this question →

Building block (monomer) of starch:

  1. β-D-Glucose
  2. α-D-Glucose
  3. Galactose
  4. Fructose
Show answer and solution

Correct answer: B. α-D-Glucose

**Starch:** polymer of α-D-glucose units linked by α-1,4 (and some α-1,6) glycosidic bonds. **Two components:** amylose (linear) and amylopectin (branched). **Cellulose differs:** β-D-glucose linked by β-1,4.

Open this question →

How to practise

  1. Choose a Biomolecules question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Chemistry topics

Chemical EquilibriumElectrochemistryCoordination CompoundsElectrochemical SeriesIdeal and Non-Ideal SolutionsIdeal SolutionsNon-Ideal SolutionsReactions in Aqueous Solution