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 increases but the reaction will not achieve Vmax
2.	The Km value increases but the reaction can ultimately achieve  Vmax
3.	The Km value decreases but the reaction will not achieve Vmax
4.	The Km value decreases but the reaction can ultimately achieve  Vmax

The compound shown below:

1. is a component of the ATP molecule

2. is most commonly found in ori region of DNA

3. can have enzymatic activity

4. may be a component of the cell membrane

The zwitterion is shown by:

1. Only A

2. Only B

3. Both A and C

4. A, B and C

Consider the following statements:

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Codes

            I           II         III         IV

1.         1           2           3           4

2.         2           1           4           3

3.         2           1           3           4

4.         1           2           4           3

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

    Column I          Column II

(Amino Acid)          (Nature)
I. Tryptophan    1. Sulfur-containing
II. Cysteine       2. Aromatic
III. Valine          3. Basic
IV. Lysine         4. Neutral

Codes:

  I II III IV

1. 1 2 3 4

2. 2 1 4 3

3. 2 1 3 4

4. 1 2 4 3

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

A non-proteinaceous enzyme is

(1) lysozyme           

(2) ribozyme

(3) ligase               

(4) deoxyribonuclease

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

Given below is the diagrammatic representation of one of the categories of small

molecular weight organic compounds in the living tissues. Identify the category shown

and the one blank component X in it

Category              Component

1. Cholesterol       Guanin

2. Amino acid       NH₂

3. Nucleotide        Adenine

4. Nucleoside       Uracil