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

Which of the following biomolecules does have a phosphodiester bond?

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

Which of the following is not a polymeric substance?

(1) Nucleic acid               

(2) Proteins

(3) Polysaccharides           

(4) Lipids

A non-proteinaceous enzyme is

A cell organelle containing hydrolytic enzyme is

1. lysosome                         

2. microsome

3. ribosome                         

4. mesosome

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

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