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Protein Structure


This quiz is based on the various aspects of the structure of protein molecules and amino acids.

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Multiple choice

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1.

Infectious self-reproducing agents consisting only of protein, with no nucleic acids (hypothesized in 1982 by Nobel Laureate Stanley B. Prusiner) are called :

  proteomes

  exteins

  proteinoids

  Prions

  Half-n-half Clue
 

2.

Which of the following is not an aromatic amino acid ?

  Tyrosine

  Phenylalanine

  Serine

  Tryptophan

  Half-n-half Clue
 

3.

The Quaternary structure of a protein is :

  its structure resulting from the union of more than one protein molecule, called subunit proteins.

  its amino acid sequence

  its structure resulting from hydrogen bonds between the C=O and N-H groups of different amino acids.

  its structure resulting from interactions between amino acid side chains.

  Half-n-half Clue
 

4.

Which of the following is not a type of protein secondary structure ?

  á-helix

  â-pleated sheet

  third level folding to form small globules

  Turns

  Half-n-half Clue
 

5.

Which of the following amino acids is polar ?

  Leucine

  Valine

  Histidine

  Isoleucine

  Half-n-half Clue
 

6.

Successive amino acids in the polypeptide chains that make up a protein are held together by :

  phosphodiester bonds

  peptide bonds

  interprotamine disulfide bonds

  N-glycosidic bonds

  Half-n-half Clue
 

7.

The sequence of different amino acids in the polypeptide chain of a protein is called its :

  Quaternary structure

  primary structure

  tertiary structure

  secondary structure

  Half-n-half Clue
 


 
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