Given below is the graph showing the effect of substrate concentration on enzyme activity. In the presence of a competitive inhibitor, when the concentration of the substrate is progressively increased:

 

1. The Km value is increased but the reaction will not achieve Vmax

2. The Km value is increased but the reaction can ultimately achieve Vmax

3. The Km value is decreased but the reaction will not achieve Vmax

4. The Km value is decreased but the reaction can ultimately achieve Vmax

Subtopic:  Enzyme Inhibition |
 61%
From NCERT
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Study the primary structure of a part of a hypothetical protein and choose the correct statements:

I. 1 is Serine

II. 2 is sulfur containing amino acid and can be methionine

III. 3 is aromatic amino acid and can by tyrosine

IV. 4 is an acidic amino acid

1. I, II and III only

2. I, III and IV only

3. II, III and IV only

4. I, II, III and IV

Subtopic:  Proteins |
From NCERT
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Which of the following biomolecules does have a phosphodiester bond?

(1) Fatty acids in a diglyceride

(2) Monosaccharides in a polysaccharide

(3) Amino acids in a polypeptide

(4) Nucleic acids in a nucleotide

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
 69%
From NCERT
NEET - 2015
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The chitinous exoskeleton of arthopods is formed by the polymerisation of 

(1) keratin sulphate and chondroitin sulphate

(2) D-glucosamine

(3) N-acetyl glucosamine

(4) lipoglycans

Subtopic:  Carbohydrates: Cellulose, Chitin, Inulin & Agar |
 83%
NEET - 2015
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Which one of the following statements is correct, with reference to enzymes?

(1) Apoenzyme = Holoenzyme + Coenzyme

(2) Holoenzyme = Apoenzyme + Coenzyme

(3) Coenzyme = Apoenzyme + Holoenzyme

(4) Holoenzyme = Coenzyme + Cofactor

Subtopic:  Enzyme Cofactors |
 70%
From NCERT
NEET - 2017
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Which of the following is not a polymeric substance?

(1) Nucleic acid               

(2) Proteins

(3) Polysaccharides           

(4) Lipids

Subtopic:  Introduction |
 77%
From NCERT
NEET - 2017
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A non-proteinaceous enzyme is

(1) lysozyme           

(2) ribozyme

(3) ligase               

(4) deoxyribonuclease

Subtopic:  Enzyme Introduction |
 73%
From NCERT
NEET - 2016
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Which of the following is the least likely to be involved in stabilising the three-dimensional folding of most proteins?

(1) Hydrogen bonds

(2) Electrostatic interaction

(3) Hydrophobic interaction

(4) Ester bonds

 

Subtopic:  Structural Organisation of Proteins |
NEET - 2016
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Which of the following describes the graph correctly?

(1) Endothermic reaction with energy A in the presence of enzyme and B in the absence of enzyme

(2) Exothermic reaction with energy A in the presence of enzyme and B in the absence of enzyme

(3) Endothermic reaction with energy A in the absence of enzyme and B in the presence of enzyme

(4) Exothermic reaction with energy A in the absence of enzyme and B in the presence of enzyme

 

Subtopic:  Mechanism of Enzymes |
 75%
From NCERT
NEET - 2016
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Which one of the following statements is wrong?

(1) Cellulose is a polysachharide

(2) Uracil is a pyrimidine

(3) Glycine is a sulphur containing amino acid

(4) Sucrose is a diasaccharide

Subtopic:  Different Amino Acids |
 83%
From NCERT
NEET - 2016
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