Which of the following monosaccharide is pentose sugar?

1. Mannose 

2. Ribose

3. Galactose

4. Glucose

The following diagram shows the molecular structure of:

 1. A hexose sugar

 2. An aromatic amino acid

 3. A nitrogenous base found in RNA

 4. An important constituent of a DNA nucleotide.

Choose the incorrect match.

The molecule represented is :-

1. uridine and it is pyrimidine

2. uridylic acid and it is nucleoside

3. uridylic acid and it is nucleotide

4. uridine and it is nucleoside

The structure given below is of

1. A purine base

2. Adenosine

3. Adenylic acid

4. A pyrimidine base

The compound shown below:

1. is a component of the ATP molecule

2. is most commonly found in ori region of DNA

3. can have enzymatic activity

4. may be a component of the cell membrane