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 amino acids are there?

1.20

2.more than 20

3.less than 20

4.Both 1 and 3

How many types of proteinaceous amino acids are there?

1.20

2.more than 20

3.less than 20

4.Both 1 and 3

An amino acid can have ____ charge in solutions of  different pH.

1.positive

2.negative

3.no charge

4.All of these

Which of the following is the most complex amino Acid

1.Histidine

2.Tryptophan

3.Tyrosine

4.Threonine

Which of the following is an essential amino acid?

1.Isoleucine

2.lysine

3.Leucine

4.All of these

Which of the following is not  an essential amino acid?

1.Isoleucine

2.lysine

3.Leucine

4.Alanine

Which of the amino acid contains hydroxyl group?

1.Serine

2.Threonine

3.Phenyl alanine

4.Both 1 and 2

Which of the following is called as imino acid?

1.Histidine

2.Lysine

3.Leucine

4.proline

Out of 20 proteinaceous amino acids how many of them are laevorotatory(l-form).

1.All 20

2.10

3.19

4.18