Class XII

The three parts of a nucleotide are called: phosphate, nitrogen base and a ____________.
  1. sugar
  2. hydrogen
  3. potassium
  4. nickel
The two nucleic acids that play crucial roles in the synthesis of proteins:
  1. A. ribonucleic acid- RNA
  2. B. deoxyribonucleic acid
  3. both A & B
  4. neither A nor B
DNA carries the instructions for making ____________ made of amino acids.
  1. proteins
  2. nucleic acids
  3. nitrogen
  4. oxygen
According to the nitrogen base pair ruling adenine (A) will only make a bond with ____________.
  1. urasil (U)
  2. guanine (G)
  3. thymine
  4. cytosine (C)
A section of DNA that codes for what type of proteins the organism will make are called _____________.
  1. proteins
  2. nucleic acids
  3. genes
  4. genetics
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