Q.1.
Enzyme catalysing optical or geometrical rearrangement of atomic grouping without altering molecular weight or number of atoms is ... ... [ DPMT 2009]
-
100%
a) Ligase
-
0%
b) Isomerase
-
0%
c) Oxidoreductase
-
0%
d) Hydrolase
Q.2.
A nitrogen base is linked to sugar by a glycosidic bond at carbon number ... ..... [ Odisha 2009]
-
0%
a) 1'
-
50%
b) 2'
-
0%
c) 4'
-
50%
d) 5'
Q.3.
Select the option which is not correct with respect to enzyme action :… [AIPMT 2014]
-
0%
a) A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate.
-
50%
b) Malonate is a competitive inhibitor of succinic dehydrogenase.
-
50%
c) Substrate binds with enzyme at its active site.
-
0%
d) Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate.
Q.4.
Which one of the following is a non – reducing carbohydrate? [AIPMT 2014]
-
50%
a) Lactose
-
50%
b) Ribose 5 - phosphate
-
0%
c) Maltose
-
0%
d) Sucrose
Q.5.
Which one of the following statements is incorrect? …[AIPMT 2015]
-
50%
a) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate.
-
50%
b) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme inhibitor complex.
-
0%
c) In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.
-
0%
d) The competitive inhibitor does not affect the rate of breakdown of the enzyme substrate complex.
Q.6.
Which one of the following statements is wrong ? …[AIPMT-2016]
-
0%
a) Sucrose is a disaccharide.
-
50%
b) Cellulose is a polysaccharide.
-
0%
c) Uracil is a pyrimidine.
-
50%
d) Glycine is a sulphur containing amino acid.
Q.7.
A typical fat molecule is made up of :- …[AIPMT-2016]
-
0%
a) Three glycerol molecules and one fatty acid molecule
-
0%
b) One glycerol and three fatty acid molecules
-
100%
c) One glycerol and one fatty acid molecule
-
0%
d) Three glycerol and three fatty acid molecules
Q.8.
Transition state structure of the substrate formed during an enzymatic reaction is .. [NEET 2013]
-
0%
a) Transient but stable
-
0%
b) Permanent but unstable
-
100%
c) Transient and unstable
-
0%
d) Permanent and stable
Q.9.
A phosphoglyceride is always made up of …[NEET 2013]
-
100%
a) Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
-
0%
b) Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
-
0%
c) A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
-
0%
d) A saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule
Q.10.
The essential chemical components of many coenzymes are …[NEET 2013]
-
0%
a) Proteins
-
100%
b) Nucleic acids
-
0%
c) Carbohydrates
-
0%
d) Vitamins
Q.11.
A non-proteinaceous enzyme is :- …[NEET 2016]
-
0%
a) Ligase
-
100%
b) Deoxyribonuclease
-
0%
c) Lysozyme
-
0%
d) Ribozyme
Q.12.
Which of the following is the least likely to be involved in stabilizing the three–dimensional folding of most proteins? …[NEET 2016]
-
0%
a) Hydrophobic interaction
-
0%
b) Ester bonds
-
100%
c) Hydrogen bonds
-
0%
d) Electrostatic interaction
Q.13.
Which of the following describes the given graph correctly? …[NEET 2016]
-
0%
a) Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme
-
100%
b) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme
-
0%
c) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme
-
0%
d) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme
Q.14.
Transition state structure of the substrate formed during an enzymatic reaction is .. [NEET 2013]
-
0%
a) Transient but stable
-
0%
b) Permanent but unstable
-
100%
c) Transient and unstable
-
0%
d) Permanent and stable
Q.15.
Which of the following biomolecules does have a phosphodiester bond ? [ ReAIPMT 2015]
-
0%
a) Nucleic acids in a nucleotide
-
0%
b) Fatty acids in a diglyceride
-
0%
c) Monosaccharaides in a polysaccharide
-
0%
d) Amino acids in a polypeptide
Q.16.
A phosphoglyceride is always made up of …[NEET 2013]
-
0%
a) Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
-
0%
b) Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
-
100%
c) A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
-
0%
d) A saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule
Q.17.
The essential chemical components of many coenzymes are …[NEET 2013]
-
0%
a) Proteins
-
0%
b) Nucleic acids
-
0%
c) Carbohydrates
-
0%
d) Vitamins
Q.18.
Which one of the following statements is correct, with reference to enzymes? ….[NEET- 2017]B30
-
0%
a) Apoenzyme = Holoenzyme + Coenzyme
-
0%
b) Holoenzyme = Apoenzyme + Coenzyme
-
0%
c) Coenzyme = Apoenzyme + Holoenzyme
-
0%
d) Holoenzyme = Coenzyme + Cofactor
Q.19.
Which of the following are not polymeric? ….[NEET- 2017]
-
0%
a) Nucleic acids
-
0%
b) Proteins
-
0%
c) Polysaccharides
-
0%
d) Lipids
Q.20.
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptidesimultaneously. Such strings of ribosomes are termed as … … [NEET -2018]
-
0%
a) Polysome
-
0%
b) Polyhedral bodies
-
0%
c) Plastidome
-
0%
d) Nucleosome
Explanation
Q.21.
The two functional groups characteristic of sugars Are … … [ NEET 2018]
-
0%
a) hydroxyl and methyl
-
0%
b) carbonyl and methyl
-
0%
c) carbonyl and phosphate
-
0%
d) carbonyl and hydroxyl
Q.22.
Identify the figure and select the incorrect statement: {Question submitted by Adhithyan js}
-
0%
a) This is an animal polysaccharide.
-
0%
b) It is a polymer of β glucose.
-
0%
c) It is a branched homopolymer.
-
0%
d) Unlike starch glycogen also has both amylose and amylopectin.
Q.23.
How many of the following are secondary metabolites: Rubber, Flavanoids, Glucose, Glycine, Antibiotics, Starch, Gum, Cellulose, Chitin, Anthocyanin, Insulin and Pepsin. {Question submitted by Adhithyan js}
-
0%
a) 2
-
0%
b) 4
-
0%
c) 5
-
0%
d) 6
Q.24.
How many of the following are homopolymer? Inulin, Insulin, Chitin, Cellulose, GLUT-4, Glycogen {Question submitted by Adhithyan js}
-
0%
a) 2
-
0%
b) 3
-
0%
c) 4
-
0%
d) 5
Q.25.
Consider the following statement : (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option. ... [ NEET 2019]
-
0%
d) (A) is false but (B) is true.
-
0%
a) Both (A) and (B) are true.
-
0%
b) (A) is true but (B) is false
-
0%
c) Both (A) and (B) are false.
Q.26.
An athlete will usually load up on this Biomolecules the night before a big game/event.
-
0%
a) Lipid
-
0%
b) Carbohydrates.
-
0%
c) Protein.
-
0%
d) Nucleic acid.
Q.27.
homopolymer has only one type of building block called monomer repeated n number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers made of amino acids. While a nucleic acid like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made of: {Question submitted by Adhithyan js}
-
0%
a) 20 types of monomers
-
0%
b) 40 types of monomers.
-
0%
c) 3 types of monomers.
-
0%
d) only one type of monomer.
Explanation
Q.28.
Sulpha drugs are used to control bacteria pathogens, because they cause: {Question submitted by Adhithyan js}
-
0%
a) Competitive inhibition of folic acid synthesis.
-
0%
b) Allosteric inhibition of folic acid synthesis.
-
0%
c) Feedback inhibition of folic acid synthesis
-
0%
d) Irreversible inhibition of folic acid synthesis.
Q.29.
atch the following: {Question submitted by Adhithyan js}
| Secondary metabolite | Source |
| Morphine | (i) Abris |
| Abrin | (ii) Vinca rosea |
| Ricin | (iii) Papaver |
| Concanavalin A | (iv) Curcuma longa |
| Vinblastin | (v) Canavalia |
| Curcumin | (vi) Ricinus |
-
0%
a) 1-(iv), 2-(v), 3-(vi), 4-(i), 5-(ii), 6-(iii).
-
0%
b) 1-(iii), 2-(vi), 3-(v), 4-(i), 5-(ii), 6-(iv).
-
0%
c) 1-(iii), 2-(i), 3-(vi), 4-(v), 5-(ii), 6-(iv).
-
0%
d) 1-(v), 2-(vi), 3-(iv), 4-(i), 5-(ii), 6-(iii).
Q.30.
Identify the compound in the figure: {Question submitted by Adhithyan js}
-
0%
a) Ribose
-
0%
b) Glucose
-
0%
c) Fructose
-
0%
d) Arabinose
Q.31.
Which of the following have lower melting point? {Question submitted by Adhithyan js}
-
0%
a) Fat.
-
0%
b) Oil.
-
0%
c) Lipid.
-
0%
d) Wax.
Q.32.
Prostaglandins are: {Question submitted by Adhithyan js}
-
0%
a) Simple proteins
-
0%
b) Conjugated proteins.
-
0%
c) Saturated fatty acids.
-
0%
d) Unsaturated fatty acids
Q.33.
A molecule of cellulose is made up of about: {Question submitted by Adhithyan js}
-
0%
a) 100,000 glucose molecules.
-
0%
b) 200,000 glucose molecules.
-
0%
c) 3000-6000 glucose molecules.
-
0%
d) 3000-6000 fructose molecules.
Q.34.
Which among the following is a diamino monocarboxylic amino acid? {Question submitted by Adhithyan js}
-
0%
a) Glutamic acid
-
0%
b) Tryptophan
-
0%
c) Lysine
-
0%
d) Methionine
Explanation
Q.35.
Identify the structure: {Question submitted by Adhithyan js}
-
0%
a) Adenosine
-
0%
b) Guanosine
-
0%
c) Adenine
-
0%
d) Guanine
Q.36.
Find out the number of wrong statements from the following statements: (i) In cholesterol there are 1 hexagonal ring and three pentagonal ring. (ii) Cellulose is a homopolymer. (iii) First amino acid in a polypeptide is called ‘C’ terminal and the last amino acid is called ‘N’ terminal amino acid. (iv) In a polysaccharide, the individual monosaccharides are linked by glycosidic bond. (v) Number of phosphate group possible for nucleotide may be one, two or three. {Question submitted by Adhithyan js}
-
0%
a) 4
-
0%
b) 3
-
0%
c) 1
-
0%
d) 2
Q.37.
The only biopolymer existing as both homo and heteropolymer is: {Question submitted by Adhithyan js}
-
0%
a) Carbohydrates.
-
0%
b) Proteins
-
0%
c) Lipids.
-
0%
d) Nucleic acids.
Q.38.
Which of the following is the membrane stabilizing molecule?
-
0%
a) Phospholipids.
-
0%
b) Proteins
-
0%
c) Carbohydrates
-
0%
d) Sterols
Q.39.
Concanavalin A is ... ... [ NEET 2020 ]
-
0%
a) an alkaloid
-
0%
b) an essential oil
-
0%
c) a lectin
-
0%
d) a pigment
Q.40.
Which of the following glucose transporters is insulin-dependent? [NEET 2019]
-
0%
a) GLUT I
-
0%
b) GLUT II
-
0%
c) GLUT III
-
0%
d) GLUT IV
Q.41.
Floridean starch has structure similar to
-
0%
a) Mannitol and algin
-
0%
b) Laminarin and cellulose
-
0%
c) Starch and cellulose
-
0%
d) Amylopectin and glycogen
Q.42.
Identify the substances having glycosidic bond and peptide bond, respectively in their structure [NEET 2020]
-
0%
a) Cellulose, lecithin.
-
0%
b) Inulin, insulin
-
0%
c) Chitin, cholesterol
-
0%
d) Glycerol, trypsin
Q.43.
Statement 1: Competitive inhibitor is also called substrate analogue. Statement 2: It resembles the enzyme in structure.
-
0%
a) Both statements -1 and statement - 2 are true and statement - 2 is the correct explanation of statement - 1.
-
0%
b) Both statements -1 and statement - 2 are true but statement - 2 is not the correct explanation of statement - 1.
-
0%
c) Statement -1 is true and statement - 2 is false.
-
0%
d) Statement -1 is false and statement - 2 is true.
Q.44.
Match the following:
| Column I | Column II |
| a. Transport protein | Insulin |
| b. Regulatory protein (Hormone) | Enzymes |
| c. Sensory or receptor protein | Antibody |
| d. Protective protein (Defence) | Rodopsin |
| e. Contractile protein | Actin and Myosin |
| f. Catalytic protein | GLUT – 4 |
| g. Intercellular ground substance (Structural protein) | Collagen |
-
0%
a) a= 6; b= 1; c = 4; d= 3; e= 5; f= 2; g= 7
-
0%
b) a= 6; b= 1; c = 4; d= 3; e= 2; f= 5; g= 7
-
0%
c) a= 6; b= 4; c = 1; d= 3; e= 5; f= 2; g= 7
-
0%
d) a= 6; b= 4; c = 1; d= 3; e= 2; f= 5; g= 7
Q.45.
Choose the correct statement
-
0%
a) All proteins have 20 amino acids
-
0%
b) Both ends of protein are similar
-
0%
c) All proteins are soluble
-
0%
d) Proteins are formed by peptide bonds
Q.46.
Which of the following element is present in very less quantity in the body
-
0%
a) K
-
0%
b) Ca
-
0%
c) Mg
-
0%
d) Cu
Q.47.
Which of the following is incorrect
-
0%
a) The hair protein, keratin, is synthesised from amino acid methionine
-
0%
b) Phospholipids acts as carriers of inorganic ions across the cell membrane
-
0%
c) Dietary intake of PUFA increases the serum cholesterol level in our body
-
0%
d) Cobalt is a constituent of vit. B12
Q.48.
Which of the following is not an example of feedback inhibition?
-
0%
a) Inhibition of hexokinase by glucose-6-phosphate
-
0%
b) Inhibition of succinic dehydrogenase by malonate
-
0%
c) Inhibition of threonine deaminase by isoleucine in bacteria
-
0%
d) Inhibition of phosphofructokinase by ATP
Q.49.
It is said that elemental composition of living organisms and that of inanimate objects (like earth’s crust) are similar in the sense that all major elements are present in both. Then what would be the main difference between these two groups. Choose the correct answer from the options given below:
-
0%
a) Living organisms have more accumulation of gold in them than inanimate objects.
-
0%
b) Living organisms have more water in their body than inanimate objects.
-
0%
c) Living organisms have more carbon, hydrogen and oxygen per unit mass than inanimate objects.
-
0%
d) Living organisms have more calcium in them than inanimate objects.
Q.50.
Which of the following is not an unsaturated fatty acid?
-
0%
a) Oleic acid.
-
0%
b) Stearic acid.
-
0%
c) Linoleic acid.
-
0%
d) Linolenic acid.