Which of the following is a nucleotide?

1.Adenylic acid

2.Adenosine

3.Adenoside

4.Both 1 and 3

Nucleic acids  consist of        

1.Nucleotide only

2.Nucleoside only

3.Sugar + Phosphate only

4.Nitrogenous bases only

Nitrogenous bases are

1.Heterocyclic rings

2.Homocyclic rings

3.Organic compounds

4.Both 1 and 3

Uridine is

1.Nucleotide

2.Nucleoside

3.Nitrogenous base

4.Amino acid

Which one is correct

1.Adenine = Pyrimidine, Uracil= Purine

2.Adenine= Purine, Uracil= Purine

3.Adenine= Adenylic acid, Uracil=Uridylic acid

4.Adenine= Purine, Uracil= Pyrimidine

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

Select the correct arrangement of elements present in human body

1.C>O>H>N

2.C>O>N>H

3.O>C>H>N

4.O>C>N>H

The least abundant element present in human body is

1.Oxygen

2.Carbon

3.Nitrogen

4.Hydrogen

Which of the following element is present in negligible amount in human body?

1.Magnesium

2.Suphur

3.Silicon

4.Sodium

When chemical analysis of living tissue was done  using trichloroacetic acid, then then filtrate formed was

1.acid insoluble fraction

2.acid soluble fraction

3.retentate

4.Both 1 and 3