The vitamin Niacin functions as a coenzyme in:

1. Nucleoprotein synthesis

2. Hydrogen transport

3. Fatty acid synthesis

4. RBC production

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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

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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 

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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

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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

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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

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Which one of the following statements is correct, with reference to enzymes?

(a) Apoenzyme = Holoenzyme + Coenzyme

(b) Holoenzyme = Apoenzyme + Coenzyme

(c) Coenzyme = Apoenzyme + Holoenzyme

(d) Holoenzyme = Coenzyme + Cofactor

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Which of the following are not polymeric?

(a) Nucleic acid                (b) Proteins

(c) Polysaccharides           (d) Lipids

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A non-proteinaceous enzyme is

(a) lysozyme           (b) ribozyme

(c) ligase                (d) deoxyribonuclease

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Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?

(a) Glucose -6-phosphate

(b) Fructose 1,6-bisphosphate

(c) Pyruvic acid

(d) Acetyl Co-A

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