Q. No.In an average composition of a cell, the maximum % of total cellular mass [after water and protein] is constituted by:
1. Carbohydrates
2. Lipid
3. Nucleic acids
4. Ions
Where would you expect to find serine and alanine amino acids in a globular protein in aqueous solution?
(1) Serine would be in the interior, and alanine would be on the exterior of the globular protein.
(2) Alanine would be in the interior, and serine would be on the exterior of the globular protein.
(3) Both serine and alanine would be in the interior of the globular protein.
(4) Both serine and alanine would be on the exterior of the globular protein.
The vitamin Niacin functions as a coenzyme in:
1. Nucleoprotein synthesis
2. Hydrogen transport
3. Fatty acid synthesis
4. RBC production
The six most common atoms in organic molecules are:
| 1. | Carbon, Hydrogen, Oxygen, Helium, Calcium and Sulphur |
| 2. | Carbon, Hydrogen, Oxygen, Calcium, Magnesium and Sulphur |
| 3. | Carbon, Oxygen, Nitrogen, Sulphur, Phosphorous and Magnesium |
| 4. | Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous and Sulphur |
The unique properties of each amino acid are determined by its particular:
1. R group
2. Amino group
3. Kinds of peptide bonds
4. Number of bonds to other amino acids
Based on the graph of an enzyme-catalyzed reaction, which of the following could be used to increase the reaction rate beyond point C?
1. increase the amount of substrate
2. add more water
3. increase the temperature
4. decrease enzyme concentration
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 |
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
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
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
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