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

1.  (a)
2.  (b)
3.  (c)
4.  (d)

How many groups of the methane can be substituted to form an amino acid Glycine.

1.4

2.3

3.2

4.1

How many types of proteinaceous amino acids are there?

1.20

2.more than 20

3.less than 20

4.Both 1 and 3

Which group of the amino acid contributes essentially to the chemical and physical properties of amino acids?

1.Amino group

2.Carboxyl group

3.Alkyl group (R group)

4.All of these

Which of the following is true about Lipids

1.It is a polymer of Fatty acids and Glycerol

2.Water soluble

3.Fatty acids can be saturated or unsaturated

4.both 1 and 3

Which of the following is true about Cholesterol?

1. It contains four fused hydrocarbon rings

2. Organic molecule

3. Hydroxyl group is present

4. All of these

Which of the following is incorrect.

1.Nucleotides- Nucleosides = phosphate

2.Nucleosides + Phosphate = Nucleotides

3.Nucleosides – Nucleotides = Phosphate

4.Both 1 and 2

Which of the following is true?

1. All the elements present in a sample of earth’s crust are also present in a sample of living tissue

2. Carbon and Hydrogen are  present in more amount in any living organism than earth’s crust.

3. Carbon and Hydrogen are present in more in living organisms than in non living matter.

4. All of the above

Which of the following element is present in negligible amount in human body?
1. Magnesium
2. Suphur
3. Silicon
4. Sodium

Which of the following is true?