Aminoacids and Heterocyclic compounds

The amino acid with highest isoelcctric point is:

• Asparagine

• Histidine

• Lysine

• Arginine

How many stereocentres are presents in " Glycyclalanylalanine" peptide

• 1

• 2

• 3

• 4

The amino acids having a hydroxyl functional group are

• Serine, Threonine, and Tyrosine

• Serine, Valine, and Lysine

• Cysteine, Valine, and Lysine

• Threonine, Cysteine, and Valine

The reagent used in the protein sequence analysis is

• van-Slyke reagent

• Sanger reagent

• Sorenson reagent

• Borsche's reagent

which of the following amino acid liberates ammonia on mild hydrolysis and then yields a different amino acid

• Lysine

• Aspargine

• Tryptophan

• Alanine

Lysisne has Pka1 = 2.18 and Pka2 = 8.9. the Pka of ionisation of side chain is 10.53 then isoelectic point of lysine is

• 5.45

• 7.12

• 9.72

• 6.35

The corrrect aromaticity order is

• Thiophene > Benzene > Pyrrole > Furan

• Thiophene > Benzene > Furan > Pyrrole

• Benzene > Thiophene > Furan > Pyrrole

• Benzene > Thiophene > Pyrrole > Furan

Thiophene reacts with HCHO and HCl to give

• 
• 
• 
• Both a and b

Which of the follwoing is an essential aminoacid

• 
• 
• 
• All of the above

Glycine reacts with excess formalin solution to form

• N- methylene glycine

• N - Methyl glycine

• hydroxy glycine

• Dimethylol gycine