MCQ Questions For Class 11 Biology Chapter 9 Biomolecules With Answer PDF

MCQ questions for class 11 biology chapter 9 : MCQs Questions for Class 11 Biology NEET MCQ Biomolecules with Answers PDF Free Download prepared here according to the latest CBSE RBSE ans other State Board syllabus and NCERT curriculum. Students can practice CBSE Class 11 Biology MCQs Multiple Choice Questions for all Chapter. NEET MCQ Biomolecules

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MCQs questions for class 11 biology chapter 9

Question 1.
Which one of the following is wrongly matched?
(a) Enzyme – Lipopolysaccharide
(b) Phospholipid – Plasma membrane
(c) ATP – Nucleotide derivative
(d) Antibody – Glycoprotein

Answer: (a) Enzyme – Lipopolysaccharide

Question 2.
A functional protein is
(a) Collagen
(b) Ossein
(c) Vitamin
(d) Enzyme

Answer: (d) Enzyme

Question 3.
Nitrogenous bases present in DNA
(a) Adenine, guanine, cytosine, uracil
(b) Adenine, guanine, cytosine, thymine
(c) Adenine, thymine, uracil
(d) Guanine, uracil

Answer: (b) Adenine, guanine, cytosine, thymine

Question 4.
Metabolic intermediates found in living system which are essential for growth and life is called___________
(a) Saponins
(b) Tannins
(c) Secondary metabolite
(d) Primary metabolites

Answer: (d) Primary metabolites

Question 5.
DNA differs from RNA in having
(a) Thymine but no uracil
(b) Uracil but no thymine
(c) Thymine but no cytosine
(d) Cytosine but no guanine

Answer: (a) Thymine but no uracil | NEET MCQ Biomolecules

Question 6.
Enormous diversity of protein molecules is due to
(a) R groups of amino acids
(b) Sequence of amino acids
(c) Peptide bonds
(d) Amino groups of amino acids

Answer: (b) Sequence of amino acids

Question 7.
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.

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

Question 8.
Anti-parallel strands of a DNA molecule mean that
(a) One strand turns anticlockwise
(b) Phosphate groups at the start of two DNA strands (poles) are in opposite position
(c) Phosphate groups of two DNA strands at their ends share the same position
(d) One strand turns clockwise

Answer: (b) Phosphate groups at the start of two DNA strands (poles) are in opposite position

Question 9.
The introduction of t-DNA into plants involves:
(a) Altering the pH of the soil, then heat shocking the plants
(b) Exposing the plants to cold for a brief period
(c) Allowing the plant roots to stand in water
(d) Infection of the plant by Agrobacterium tumefaciens

Answer: (d) Infection of the plant by Agrobacterium tumefaciens

Question 10.
Double hydrogen bond occurs in DNA between
(a) Adenine and guanine
(b) Thymine and cytosine
(c) Adenine and thymine
(d) Uracil and thymine

Answer: (c) Adenine and thymine

Question 11.
The most common monomer of carbohydrates is
(a) Sucrose
(b) Fructose
(c) Maltose
(d) Glucose

Answer: (d) Glucose

Question 12.
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

Answer: (c) Hormones

Question 13.
Nitrogen is a component of
(a) Carbohydrates
(b) Lipids
(c) Proteins
(d) Polyphosphates

Answer: (c) Proteins

Question 14.
Maximum iron occurs in
(a) WBC
(b) Bone cells
(c) Protein
(d) RBC

Answer: (d) RBC

Question 15.
The most abundant mineral of the animal body is
(a) Potassium
(b) Sodium
(c) Calcium
(d) Iron

Answer: (c) Calcium

Question 16.
The bacterial cell wall is formed of
(a) Cellulose
(b) Hemicellulose
(c) Peptidoglycan
(d) Glycogen

Answer: (c) Peptidoglycan

Question 17.
Ester linkages occur in
(a) Proteins
(b) Lipids
(c) Nucleic acids
(d) Carbohydrates

Answer: (b) Lipids

Question 18.
ATP was discovered by
(a) Bowman
(b) Lipmann
(c) Blackman
(d) Karl Lohmann

Answer: (d) Karl Lohmann

Question 19.
Adenine is
(a) Nucleoside
(b) Purine
(c) Pyrimidine
(d) Nucleotide

Answer: (b) Purine

Question 20.
Which one is a fibrous protein?
(a) Collagen
(b) Haemoglobin
(c) Globulin
(d) Hordein

Answer: (a) Collagen

Question 21.
Among the following natural materials, the largest amount of cellulose is found in
(a) Wood
(b) Fruit pulp
(c) Wheat straw
(d) Cotton fibre

Answer: (d) Cotton fibre

Question 22.
Which of the following secondary metabolites is wrongly matched? biology NEET MCQ Biomolecules
(a) Pigments – Carotenoids, anthocyanins
(b) Polymeric substances – Rubber, gums
(c) Toxin – Abrin, ricin
(d) Alkaloids – Lemon grass oil

Answer: (d) Alkaloids – Lemon grass oil

Question 23.
Which of the following are the most diverse molecules of a cell?
(a) Mineral salts
(b) Lipids
(c) Proteins
(d) Carbohydrates

Answer: (c) Proteins

Question 24.
Cellulose is made up of
(a) Fructose
(b) Glucose
(c) Sucrose
(d) Ribose

Answer: (b) Glucose

Question 25.
Which of the following is required as inducer(s) for the expression of Lac operon?
(a) Glucose
(b) Galactose
(c) Lactose
(d) Lactose and galactose

Answer: (c) Lactose

Question 26.
Glycogen is a homopolymer made of
(a) Glucose units
(b) Galactose units
(c) Amino acids
(d) Ribose units

Answer: (a) Glucose units

Question 27.
Which one of the following is a non – reducing carbohydrate?
(a) Maltose
(b) Sucrose
(c) Lactose
(d) Ribose 5 – phosphate

Answer: (b) Sucrose

Question 28.
Which of the following carbohydrates is not a disaccharide?
(a) Lactose
(b) Maltose
(c) Sucrose
(d) Galactose

Answer: (d) Galactose

Question 29.
An enzyme/protein is formed by chemically bonding together
(a) CO₂
(b) Lipases
(c) Carbohydrates
(d) Amino acids

Answer: (d) Amino acids

Question 30.
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

Answer: (a) Adenine, Thymine – Purines

Question 31.
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

Answer: (a) L-amino acids only

Question 32.
Which of the following biomolecules are not strictly macromolecules?
(a) Lipids
(b) Nucleic acids
(c) Proteins
(d) Polysaccharides

Answer: (a) Lipids

Question 33.
A protein which lacks a metal is
(a) Glycoprotein
(b) Haemoglobin
(c) Ferredoxin
(d) Cytochrome

Answer: (a) Glycoprotein

Question 34. Biology NEET MCQs
Which of the following is not a conjugated protein?
(a) Peptone
(b) Glycoprotein
(c) Chromoprotein
(d) Lipoprotein

Answer: (a) Peptone

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