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

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Questions
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

Girl in a jacket

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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