Biomolecules MCQ Questions for Class 11 Biology Chapter 9 with Answers

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NCERT Chapters for Class 11 Biology


Q1. Which of the following secondary metabolites is wrongly matched?

(A) Pigments – Carotenoids, anthocyanins
(B) Polymeric substances – Rubber, gums
(C) Toxin – Abrin, ricin
(D) Alkaloids – Lemon grass oil


(D) Alkaloids – Lemon grass oil


Q2. The most abundant component of a cell is

(A) Lipid
(B) Protein
(C) Water
(D) Cellulose


(C) Water.


Q3. Lecithin is a

(A) polysaccharide
(B) protein
(C) nucleic acid
(D) lipid


(D) liquid


Q4. Which of the following is not a pyrimidine?

(A) Uracil
(B) Cytosine
(C) Guanine
(D) Thymine


(C) Guanine


Q5. Cellulose occurs in

(A) Cell wall
(B) Cell membrane
(C) Cell interior
(D) Tunicates.


(A) Cell wall.


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

(A) Lipids
(B) Nucleic acids
(C) Proteins
(D) Polysaccharides


(A) Lipids


Q7. An enzyme brings about

(A) decrease in reaction time
(B) increase in reaction time
(C) increase in activation energy
(D) reduction in activation energy


(D) reduction in activation energy


Q8. In RNA, thymine is replaced by

(A) Uracil
(B) Guanine
(C) Both
(D) None of these


(A) Uracil


Q9. Glycogen is a homopolymer made of

(A) Glucose units
(B) Galactose units
(C) Amino acids
(D) Ribose units


(A) Glucose units


Q10. A nucleoside is formed of

(A) Phosphate and nitrogen base
(B) Pentose sugar and phosphate
(C) Pentose sugar, phosphate and nitrogen base
(D) Pentose sugar and nitrogen base.


(D) Pentose sugar and nitrogen base.


Q11. 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


Q12. Enzymes increase the rate of reaction by

(A) lowering activation energy
(B) increasing activation energy
(C) increasing temperature and pH
(D) decreasing temperature and pH


(A) lowering activation energy


Q13. Which of the following is a non-reducing sugar?

(A) Lactose
(B) Glucose
(C) Maltose
(D) Sucrose.


(D) Sucrose.


Q14. The most abundant mineral of the animal body is

(A) Potassium
(B) Sodium
(C) Calcium
(D) Iron


(C) Calcium


Q15. DNA is composed of repeating units of

(A) ribonucleosides
(B) deoxyribonucleosides
(C) ribonucleotides
(D) deoxyribonucleotides


(D) deoxyribonucleotides


Q16. Most abundant organic compound on earth is

(A) Cellulose
(B) Steroids
(C) Protein
(D) Lipids


(A) Cellulose


Q17. Which of the following carbohydrates is not a disaccharide?

(A) Lactose
(B) Maltose
(C) Sucrose
(D) Galactose


(D) Galactose


Q18. Amino acids are formed from

(A) Proteins
(B) Fatty acids
(C) Volatile acid
(D) α < -keto acids.


(D) α < -keto acids.


Q19. NADP contains vitamin?

(A) B1
(B) B2
(C) B3
(D) B12


(C) B3


Q20. An example of competitive inhibition of an enzyme is the inhibition of

(A) succinic dehydrogenase by malonic acid
(B) cytochrome oxidase by cyanide
(C) hexokinase by glucose-6-phosphate
(D) carbonic anhydrase by carbon dioxide


(A) succinic dehydrogenase by malonic acid


I Think the given NCERT MCQ Questions for class 11 Biology book Chapter 9 Biomolecules with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 11 Biology Biomolecules MCQs Multiple Choice Questions with Answers, drop a comment below and that we will come back to you soon.


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Chapter : 3 Plant Kingdom Class 11 MCQ Questions
Chapter : 4 Animal Kingdom Class 11 MCQ Questions
Chapter : 5 Morphology of Flowering Plants Class 11 MCQ Questions
Chapter : 6 Anatomy of Flowering Plants Class 11 MCQ Questions
Chapter : 7 Structural Organisation in Animals Class 11 MCQ Questions
Chapter : 8 Cell: The Unit of Life Class 11 MCQ Questions
Chapter : 9 Biomolecules Class 11 MCQ Questions
Chapter : 10 Cell Cycle and Cell Division Class 11 MCQ Questions
Chapter : 11 Transport in Plants Class 11 MCQ Questions
Chapter : 12 Mineral Nutrition Class 11 MCQ Questions
Chapter : 13 Photosynthesis in Higher Plants Class 11 MCQ Questions
Chapter : 14 Respiration in Plants Class 11 MCQ Questions
Chapter : 15 Plant Growth and Development Class 11 MCQ Questions
Chapter : 16 Digestion and Absorption Class 11 MCQ Questions
Chapter : 17 Breathing and Exchange of Gases Class 11 MCQ Questions
Chapter : 18 Body Fluids and Circulation Class 11 MCQ Questions
Chapter : 19 Excretory Products and their Elimination Class 11 MCQ Questions
Chapter : 20 Locomotion and Movement Class 11 MCQ Questions
Chapter : 21 Neural Control and Coordination Class 11 MCQ Questions
Chapter : 22 Chemical Coordination and Integration Class 11 MCQ Questions

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