Prosthetic groups differ from co-enzymes, in which:

1.	they require metal ions for their activity.
2.	they (prosthetic groups) are tightly bound to apoenzymes.
3.	their association with apoenzymes is transient.
4.	they can serve as co-factors in a number of enzyme-catalyzed reactions.

"Ramachandran plot" is used to confirm the structure of:

1. RNA

2. Proteins

3. Triacylglycerides

4. DNA

Which of the following organic compounds is the main constituent of Lecithin?

1. Arachidonic acid

2. Phospholipid

3. Cholesterol

4. Phosphoprotein

An organic substance bound to an enzyme and essential for its activity is called:

1. coenzyme

2. holoenzyme

3. apoenzyme

4. isoemzyme

Which one of the following is a fat-soluble vitamin and its related deficiency disease?

1. Ascorbic acid - Scurvy

2. Retinol - Xerophthalmia

3. Cobalamine - Beri-Beri

4. Calciferol - Pellagra

The biological organisation starts with:

1. Submicroscopic molecular level

2. Cellular level

3. Organisms level

4. Atomic level

A competitive inhibitor of succinic dehydrogenase is:

The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration) what do the two axis (X and Y) represent? 

        
   

	X-axis	Y-axis
(a)	Temperature	Enzyme activity
(b)	Substrate concentration	Enzyme activity
(c)	Enzyme activity	Temperature
(d)	Enzyme activity	pH