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The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called:
  1. zymase
  2. pepsin
  3. maltase
  4. lipase
Solution (D)
Description: 50444.png


The helical structure of protein is stabilized by:
  1. ether bonds
  2. peptide bonds
  3. dipeptide bonds
  4. hydrogen bonds
Solution (D)
α-Helix structure is formed when the chain of α-amino acid coils as a right-handed screw because of the formation of hydrogen bonds between amide groups of the same peptide chain, i.e., NH group in one unit is linked to carbonyl oxygen of the third unit by hydrogen bonding. This H-bonding is responsible for holding helix in a position.


A compound of molecular weight 180 is acetylated to give a compound of molecular weight 390. The number of amino groups in the initial compound is:
  1. 2
  2. 4
  3. 5
  4. 6
Solution (C)
Difference in mass of compound = 390 – 180 = 210
Weight of CH3CO- group = 43
∴ Number of Description: 49946.png group = Description: 49953.png


Which of the following is not an acidic amino acid?
  1. Lysine
  2. Arginine
  3. Aspartic acid
  4. Histidine
Solution (C)
Aspartic acid is an amino acid with acidic side chain.
Description: 50452.png
Lysine, arginine, and histidine all are basic amino acids.


The two forms of D-glucopyranose obtained from the solution of D-glucose are called:
  1. isomer
  2. anomer
  3. epimer
  4. enantiomer
Solution (B)
Description: 50566.png
Two forms of D-glucopyranose are α-D(+)-glucopyranose and β-D(+)-glucopyranose. These are anomers (a pair of stereoisomers which differ in configuration only around C1 are called anomers).

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