The strands of the DNA double helix are:

1.	identical	2.	coiled around each other
3.	parallel to each other	4.	complementary to each other

At each step of ascent, the helical strand of DNA turns

The pitch of DNA helix is:

The compound from which cholesterol is formed is:
1. Mevalonic acid
2. Butyric acid
3. Alpha ketoglutaric acid
4. Acetic acid

The blood concentration of blood glucose in a normal healthy human ranges between:
1. 4.5 – 5.0 mM
2. 45 – 50 mM
3. 70 – 100 nM
4. 100 – 150 mM

The correct adjective for “living state” would be:
1. An equilibrium steady state
2. An equilibrium non steady state
3. A non equilibrium steady state
4. A non equilibrium non steady state

Almost all enzymes are:

In the absence of carbonic anhydrase in the human body, the reaction between carbon dioxide and water leading to the formation of carbonic acid:
1. Will not occur
2. Will slow down considerably
3. Will get faster
4. Will remain unaltered

Which of these can have catalytic activity?

Enzymes speed up the chemical reactions by:
1. Getting used up in the reaction
2. Formation of different products
3. Converting endothermic reactions to exothermic
4. Lowering activation energy