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Biomolecules MCQs | Biomolecules Multiple Choice Questions (MCQs) and Answers

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Free download in PDF Biomolecules Multiple Choice Questions (MCQs) and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries.
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(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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