nucleic acids

1. The monomeric unit of nucleic acid are called ___________

• a) Nucleotides

• b) Nucleosides

• c) Pyrimidines

• d) Purines

Who discovered nucleic acid?

• a) Watson and Crick

• b) Griffith

• c) Friedrich Miescher

• d) Walter Gilbert

Name the pyrimidine base which is found in RNA but not in DNA?

• 
  a) Thymine
  

• 
  b) Uracil
  

• 
  c) Adenine
  

• 
  d) Guanine

Name those purine bases which are commonly found in DNA and RNA?

• a) Adenine and guanine
  

• 
  b) Cytosine and thymine
  

• 
  c) Adenine and thymine

• d) Cytosine and guanine

Each nucleotide consists of

• (a) base­-sugar-­OH

• (b) sugar-­phosphate

• (c) base­-sugar-­phosphate

• (d) (base­-sugar­-phosphate)_x

The sugar molecule present in nucleotide is

• (a) triose

• (b) tetrose

• (c) pentose

• (d) hexose

Purine base found in RNA is

• (a) Cytosine

• (b) Thymine

• (c) Guanine

• (d) Uracil

Which bond is used to stabilize the double helix of DNA?

• Hydrophobic bond
  

• Hydrogen bond
  

• Covalent bond
  

• Ionic bond

Group of adjacent nucleotides are

joined by

• Phosphodiester bond

• Peptide bond

• Ionic bond

• Covalent bond

What is the composition of

nucleoside?

• a sugar + a phosphate

• a base + a sugar

• a base + a phosphate

• a base + a sugar + phosphate