Which of the following is the most abundant chemical in living organisms

1.Proteins

2.Water

3.Carbohydrates

4.Lipids

Which of the following compound is present in least amount in cell?

1.Water

2.nucleic acids

3.Carbohydrates

4.Lipids

Which of the following compounds is present in the maximum amount in a cell?

1.Proteins

2.Nucleic acids

3.Carbohydrates

4.Lipids

Amino acids are not

1.substituted methanes

2.organic compounds

3.Inorganic compounds

4.structural unit of proteins

Types of amino acids depend on

1.Carboxyl group

2.Amino group

3.Alkyl gruop

4.Hydrogen

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