Class 12 Chemistry Chapter 14 Biomolecules Short Questions and Answers | Class 12 Chemistry Chapter 14 Biomolecules Quiz

(1) Name the simplest amino acid

[A] Alanine

[B] Tyrosine

[C] Asparagine

[D] Glycine

Answer: Glycine

(2) Mineral associated with cytochrome is

[A] Mg

[B] Cu and Ag

[C] Fe

[D] Cu

Answer: Fe

(3) The most common secondary structure of proteins is

[A] β-pleated sheet

[B] β-pleated sheet parallel

[C] β-pleated sheet non-parallel

[D] α-helix

Answer: α-helix

(4) The term enzyme was coined by

[A] Urey Miller

[B] Pasteur

[C] Kuhne

[D] Buchner

Answer: Kuhne

(5) β-oxidation occurs in

[A] Nucleus

[B] Cytoplasm

[C] Mitochondria

[D] Chloroplast

Answer: Mitochondria

(6) Koshland’s theory of enzyme action is known as

[A] Lock and key theory

[B] Reduced fit theory

[C] Induced fit theory

[D] Enzyme coenzyme theory

Answer: Induced fit theory

(7) A high content of triglycerides are found in

[A] VLDL

[B] LDL

[C] HDL

[D] Chylomicrons

Answer: Chylomicrons

(8) Haemoglobin has

[A] Primary structure

[B] Secondary structure

[C] Tertiary structure

[D] Quaternary structure

Answer: Quaternary structure

(9) Which is the most abundant biomolecule on earth?

[A] Mineral salts

[B] Proteins

[C] Lipids

[D] Carbohydrates

Answer: Carbohydrates

(10) In which of the following an anticodon occurs

[A] tRNA

[B] mRNA

[C] rRNA

[D] DNA

Answer: tRNA

(11) The fastest enzyme is

[A] DNA gyrase

[B] Pepsin

[C] DNA polymerase

[D] Carbonic anhydrase

Answer: Carbonic anhydrase

(12) Which of the following is a phospholipid?

[A] Sterol

[B] Cholesterol

[C] Lecithin

[D] Steroid

Answer: Lecithin

(13) In double helix of DNA, the two strands are

[A] coiled around a common axis

[B] coiled differently

[C] coiled over protein sheath

[D] coiled around each other

Answer: coiled around a common axis

(14) Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

[A] base- sugar- phosphate

[B] base- sugar- OH

[C] sugar-phosphate

[D] (base sugar phosphate)n

Answer: base- sugar- phosphate

(15) The major role of minor elements inside living organisms is to act as

[A] Co factors of enzymes

[B] Binder of cell structure

[C] Constituent of hormones

[D] Building blocks of important amino acids

Answer: Co factors of enzymes

(16) Lipids are insoluble in water because lipid molecules are

[A] Hydrophilic

[B] Neutral

[C] Zwitter ions

[D] Hydrophobic

Answer: Hydrophobic

(17) ATP is

[A] vitamin

[B] Enzyme

[C] Nucleic acid

[D] Nucleotide

Answer: Nucleotide

(18) Which of the following have carbohydrate as prosthetic group

[A] Glycoprotein

[B] Lipoprotein

[C] Nucleoprotein

[D] Chromoprotein

Answer: Glycoprotein

(19) Lactose is composed of

[A] Neither lipids nor proteins can flip-flop

[B] Both lipids and proteins can flip flop

[C] While lipids can rarely flip flop, proteins cannot

[D] While proteins can rarely flip flop, lipids cannot

Answer: While lipids can rarely flip flop, proteins cannot

(20) In which of the following groups are all polysaccharides?

[A] Sucrose, glucose and fructose

[B] Maltose, lactose and fructose

[C] glycogen, sucrose and maltose

[D] Glycogen, cellulose and starch

Answer: Glycogen, cellulose and starch

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Class 12 Chemistry Chapter 14 Biomolecules MCQs | Class 12 Chemistry Chapter 14 Biomolecules Short Questions and Answers

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