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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.

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

  peptide bonds

  interprotamine disulfide bonds

  phosphodiester bonds

  N-glycosidic bonds

  Half-n-half Clue
 

2.

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

  á-helix

  â-pleated sheet

  Turns

  third level folding to form small globules

  Half-n-half Clue
 

3.

Which of the following is not an aromatic amino acid ?

  Serine

  Phenylalanine

  Tyrosine

  Tryptophan

  Half-n-half Clue
 

4.

Which of the following amino acids is polar ?

  Histidine

  Valine

  Isoleucine

  Leucine

  Half-n-half Clue
 

5.

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

  Quaternary structure

  secondary structure

  primary structure

  tertiary structure

  Half-n-half Clue
 

6.

The Quaternary structure of a protein is :

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

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

  its amino acid sequence

  its structure resulting from interactions between amino acid side chains.

  Half-n-half Clue
 

7.

How many different amino acids are found in proteins ?

  27

  20

  infinite

  30

  Half-n-half Clue
 


 
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