MCQ Questions for Class 11 Biology Chapter 9 Biomolecules with Answers

MCQ Questions for Class 11 Biology Chapter 9 Biomolecules with Answers

Check the below NCERT MCQ Questions for Class 11 Biology Chapter 9 Biomolecules with Answers Pdf free download. MCQ Questions for Class 11 Biology with Answers were prepared based on the latest exam pattern. We have provided Biomolecules Class 11 Biology MCQs Questions with Answers to help students understand the concept very well.


Q1. Ester linkages occur in

(a) Proteins
(b) Lipids
(c) Nucleic acids
(d) Carbohydrates

(b) Lipids


Q2. Which of the following is not a conjugated protein?

(a) Peptone
(b) Glycoprotein
(c) Chromoprotein
(d) Lipoprotein

(a) Peptone


Q3. The bacterial cell wall is formed of

(a) Cellulose
(b) Hemicellulose
(c) Peptidoglycan
(d) Glycogen

(c) Peptidoglycan


Q4. A protein which lacks a metal is

(a) Glycoprotein
(b) Haemoglobin
(c) Ferredoxin
(d) Cytochrome

(a) Glycoprotein


Q5. The most abundant mineral of the animal body is

(a) Potassium
(b) Sodium
(c) Calcium
(d) Iron

(c) Calcium


Q6. Which of the following biomolecules are not strictly macromolecules?

(a) Lipids
(b) Nucleic acids
(c) Proteins
(d) Polysaccharides

(a) Lipids


Q7. Maximum iron occurs in

(a) WBC
(b) Bone cells
(c) Protein
(d) RBC

(d) RBC


Q8. The naturally occurring form of amino acid in proteins

(a) L-amino acids only
(b) D-amino acids only
(c) Both L and D amino acids
(d) None of these

(a) L-amino acids only


Q9. Nitrogen is a component of

(a) Carbohydrates
(b) Lipids
(c) Proteins
(d) Polyphosphates

(c) Proteins


Q10. Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?

(a) Adenine, Thymine – Purines
(b) Uracil, Cytosine – Pyrimidines
(c) Guanine, Adenine – Purines
(d) Thymine, Uracil – Pyrimidines

(a) Adenine, Thymine – Purines


Q11. Proteins perform many physiological functions. For example, some function as enzymes. Which one of the following represents an additional function which some proteins discharge?

(a) Antibiotics
(b) Pigments making colours of flowers
(c) Hormones
(d) Pigments conferring colour to skin

(c) Hormones


Q12. An enzyme/protein is formed by chemically bonding together

(a) CO2
(b) Lipases
(c) Carbohydrates
(d) Amino acids

(d) Amino acids


Q13. The most common monomer of carbohydrates is

(a) Sucrose
(b) Fructose
(c) Maltose
(d) Glucose

(d) Glucose


Q14. Which of the following carbohydrates is not a disaccharide?

(a) Lactose
(b) Maltose
(c) Sucrose
(d) Galactose

(d) Galactose


Q15. Double hydrogen bond occurs in DNA between

(a) Adenine and guanine
(b) Thymine and cytosine
(c) Adenine and thymine
(d) Uracil and thymine

(c) Adenine and thymine


Q16. Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of

(a) allosteric inhibition
(b) feedback inhibition
(c) uncompetitive inhibition
(d) competitive inhibition

(d) competitive inhibition


Q17. The fastest enzyme known is

(a) DNA polymerase
(b) carbonic anhydrase
(c) carbonic dehydrogenase
(d) DNA ligase

(b) carbonic anhydrase


Q18. Lecithin is a

(a) polysaccharide
(b) protein
(c) nucleic acid
(d) lipid

(d) lipid


Q19. The minimum amount of energy required to initiate a chemical reaction is called

(a) enzymatic energy
(b) activation energy
(c) substrate energy
(d) initiation energy

(b) activation energy


Q20. Enzymes, vitamins and hormones are common in

(a) Enhancing oxidative metabolism
(b) Being synthesised in the body of organisms
(c) Being proteinaceous
(d) Regulating metabolism

(d) Regulating metabolism


Q21. Select the option which is not correct with respect to enzyme action:

(a) Substrate binds with enzyme at its active site.
(b) Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate.
(c) A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate.
(d) Malonate is a competitive inhibitor of succinic dehydrogenase.

(b) Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate.


Q22. Cellulose is made up of

(a) Fructose
(b) Glucose
(c) Sucrose
(d) Ribose

(b) Glucose


MCQ Questions for Class 11 Biology with Answers Chapter Wise


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