The difference between tertiary and quartenary structure is:
  • Tertiary structure has double bond whereas quartenary structure does not have double bond
  • Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains
  • Tertiary structure is fibrous whereas quartenary structure is globular
  • Tertiary structure is water-soluble whereas quartenary structure is lipid soluble
The repeating units of protein are
  • Amino acids
  • Glucose
  • Fatty acid
  • Peptides
The polypeptide in the diagram consists of;
sc-6 sb-7-Proteinimg_no 190.jpg
  • 3 amino acids and 3 peptide bonds
  • 3 amino acids and 2 peptide bonds
  • 4 amino acids and 2 phosphodiester bonds
  • 3 amino acids and 2 phosphodiester bonds
The diagram shows the structure of collagen. Based on the diagram, what is the structural level of collagen?
sc-6 sb-7-Proteinimg_no 191.jpg
  • Primary
  • Secondary
  • Tertiary
  • Quartenary
During the formation of the peptide bond which of the following takes place?
  • Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
  • Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
  • Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
  • Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
Tertiary structure is formed due to
  • interaction between the functional groups of different amino acids within a polypeptide chain
  • interaction between the side chain of different amino acids within a polypeptide chain
  • interaction between the functional groups of different amino acids between two polypeptide chains
  • interaction between the side chain of different amino acids between two polypeptide chains
Which of the following bond(s) can be found in a tertiary structure?
  • hydrogen bond
  • disulphide bridge
  • hydrophobic interaction
  • all of the above
Haemoglobin is a quartenary protein because;
  • It has more than one peptide bonds
  • Its shape is globular
  • It consists of more than one polypeptide chains
  • It has iron in each heme group
Based on the diagram, the side chain of amino acid alanine is;
sc-6 sb-7-Proteinimg_no 192.jpg
  • NH2
  • COOH
  • H
  • CH3
0:0:1



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