Class 11 Biology MCQ Chapter 9 Biomolecules
Are you preparing for your Biology exam and searching for Class 11 Biology MCQ Chapter 9 Biomolecules English Medium? If yes, then this article is the perfect study resource for you. Here, you will find important multiple-choice questions (MCQs) with answers based on the latest AHSEC syllabus.
The chapter Biomolecules helps students understand the chemical substances that make up living organisms. It covers important topics such as carbohydrates, proteins, lipids, nucleic acids, enzymes, vitamins, and the role of biomolecules in various biological processes. These concepts are essential for understanding the structure and functioning of living cells.
The MCQs provided here are carefully selected to help students revise important points, improve conceptual understanding, and prepare effectively for examinations. Solving these objective questions regularly can help students identify weak areas and strengthen their overall Biology preparation.
Whether you are studying for class tests, annual examinations, or the AHSEC HS First Year Examination, these MCQ questions and answers will help you learn the chapter more efficiently and score better marks.
Unit III. Cell Structure and Function
Class 11 Biology MCQ Chapter 9 Biomolecules
VSA & MCQ
I. Short Answer Questions (1 Mark Each)
Q1. What are biomolecules?
Ans: Biomolecules are chemical compounds found in living organisms.
Q2. What are macromolecules?
Ans: Large molecules formed by polymerisation of small units.
Q3. What are monomers?
Ans: Small units that combine to form polymers.
Q4. What are proteins made of?
Ans: Amino acids.
Q5. What are carbohydrates?
Ans: Organic compounds made of carbon, hydrogen and oxygen.
Q6. What are lipids?
Ans: Fatty substances insoluble in water.
Q7. What is a nucleotide?
Ans: Basic unit of nucleic acids.
Q8. What is enzyme?
Ans: A biological catalyst.
Q9. What is denaturation of protein?
Ans: Loss of protein structure due to heat or chemicals.
Q10. What is primary structure of protein?
Ans: Sequence of amino acids in a chain.
Q11. What is secondary structure of protein?
Ans: Folding into alpha helix or beta sheet.
Q12. What is tertiary structure?
Ans: Three-dimensional structure of protein.
Q13. What is quaternary structure?
Ans: Association of multiple polypeptide chains.
Q14. What is ATP?
Ans: Energy currency of the cell.
Q15. What is cellulose?
Ans: A structural polysaccharide in plants.
Q1. Biomolecules are
(a) Inorganic
(b) Organic
(c) Metals
(d) Salts
Ans: (b)
Q2. Proteins are made of
(a) Fatty acids
(b) Amino acids
(c) Sugars
(d) Nucleotides
Ans: (b)
Q3. Carbohydrates contain
(a) C, H, O
(b) C, N, O
(c) H, O
(d) N, P
Ans: (a)
Q4. Lipids are
(a) Soluble in water
(b) Insoluble in water
(c) Gases
(d) Minerals
Ans: (b)
Q5. Enzymes are
(a) Carbohydrates
(b) Lipids
(c) Proteins
(d) Vitamins
Ans: (c)
Q6. Monomer of protein is
(a) Glucose
(b) Amino acid
(c) Fatty acid
(d) Nucleotide
Ans: (b)
Q7. DNA is made of
(a) Amino acids
(b) Nucleotides
(c) Sugars
(d) Lipids
Ans: (b)
Q8. RNA differs from DNA in
(a) Sugar
(b) Protein
(c) Lipid
(d) Water
Ans: (a)
Q9. Glycogen is
(a) Protein
(b) Lipid
(c) Carbohydrate
(d) Vitamin
Ans: (c)
Q10. Starch is stored in
(a) Animals
(b) Plants
(c) Fungi
(d) Bacteria
Ans: (b)
Q11. Cellulose is found in
(a) Animals
(b) Plants
(c) Humans
(d) Bacteria
Ans: (b)
Q12. Triglyceride is made of
(a) Glycerol + 3 fatty acids
(b) Glucose + protein
(c) Amino acid + lipid
(d) DNA + RNA
Ans: (a)
Q13. ATP stores energy in
(a) Sugar bonds
(b) Phosphate bonds
(c) Lipid bonds
(d) Protein bonds
Ans: (b)
Q14. Enzymes are specific due to
(a) Shape
(b) Size
(c) Color
(d) Weight
Ans: (a)
Q15. Denaturation affects
(a) Primary structure
(b) Secondary structure
(c) Tertiary structure
(d) All
Ans: (d)
Q16. Ninhydrin test is for
(a) Proteins
(b) Amino acids
(c) Lipids
(d) Sugars
Ans: (b)
Q17. Biuret test detects
(a) Lipids
(b) Proteins
(c) Sugars
(d) DNA
Ans: (b)
Q18. Sudan III test is for
(a) Lipids
(b) Proteins
(c) Sugars
(d) RNA
Ans: (a)
Q19. Glycine is
(a) Sugar
(b) Amino acid
(c) Lipid
(d) Vitamin
Ans: (b)
Q20. Alanine contains
(a) NH₂ group
(b) COOH group
(c) Both
(d) None
Ans: (c)
Q21. Proteins perform
(a) Storage only
(b) Catalysis
(c) Movement
(d) All
Ans: (d)
Q22. Lipids function in
(a) Energy storage
(b) Structure
(c) Insulation
(d) All
Ans: (d)
Q23. DNA carries
(a) Energy
(b) Genetic information
(c) Oxygen
(d) Water
Ans: (b)
Q24. RNA helps in
(a) Digestion
(b) Protein synthesis
(c) Respiration
(d) Movement
Ans: (b)
Q25. Enzyme activity depends on
(a) Temperature
(b) pH
(c) Substrate
(d) All
Ans: (d)
Q26. Polysaccharides are
(a) Single sugar
(b) Two sugars
(c) Many sugars
(d) Proteins
Ans: (c)
Q27. Fatty acids are part of
(a) Proteins
(b) Lipids
(c) DNA
(d) RNA
Ans: (b)
Q28. Glycerol is part of
(a) Protein
(b) Lipid
(c) DNA
(d) RNA
Ans: (b)
Q29. Enzymes lower
(a) Temperature
(b) Activation energy
(c) pH
(d) Pressure
Ans: (b)
Q30. Biomolecules are essential for
(a) Life processes
(b) Rocks
(c) Metals
(d) Machines
Ans: (a)
