How many tripeptides can be prepared by linking the amino acids g

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

41.

Which one of the following will be most basic?

  • Aniline

  • p-methoxyaniline

  • p-methyl aniline

  • Benzylamine


42.

Nitrobenzene can be converted into azobenzene by reduction with

  • Zn, NH4Cl, 

  • Zn/NaOH, CH3OH

  • Zn/NaOH

  • LiAlH4, ether


43.

The one which is least basic is

  • NH3

  • C6H5NH2

  • (C6H5)3N

  • (C6H5)2NH


44.

Which of the following converts CH3CONH2 to CH3NH2?

  • NaBr

  • NaOBr

  • Br2

  • None of the above


Advertisement
45.

The reaction, ROH + H2CN2 in the presence of HBF4, gives the following product

  • ROCH3

  • RCH2OH

  • ROHCN2N2

  • RCH2CH3


46.

In Gattermann reaction, a diazonium group is replaced by X using Y.X and Y are

  • X Y
    Cl Cu/HCl
  • X Y
    Cl CuCl2/HCl
  • X Y
    Cl CuCl2/HCl
  • X Y
    Cl2 Cu2O/HCl

Advertisement

47.

How many tripeptides can be prepared by linking the amino acids glycine, alanine and phenyl alanine?

  • One

  • Three

  • Six

  • Twelve


C.

Six

Tripeptides are amino acids polymers in which three individual amino acid units, called residues, are linked together by amide bonds. In these, an amine group from one residue forms an amide bond with the carboxyl group of a second residue, the amino group of the second forms an amide bond with the carboxyl group of the third.

Therefore, glycine (NH2-CH2-COOH), alanine (CH3CH(NH2)-COOH) and phenyl alanine C6H5-CH2-NH2CHCOOH can be linked in six different way.


Advertisement
48.

Consider the following reaction,

C2H5HCl + AgCN EtOH/H2O X (major)

Which one of the following statements is true for X ?

(I) It gives propionic acid on hydrolysis
(II) It has an ester functional group
(III) It has a nitrogen linked to ethyl carbon
(IV) It has a cyanide group

  • IV

  • III

  • II

  • I


Advertisement
49.

When acetamide is hydrolysed by boiling with acid, the product obtained is

  • acetic acid

  • ethyl amine

  • ethanol

  • acetamide


50.

Which will not go for diazotisation?

  • C6H5NH2

  • C6H5CH2NH2


Advertisement