Recall Lecture 3

Amino acids have all of the following characteristic except

• colorless, crystalline solid

• high melting point

• optically in active

• Chiral

The pH at which the amino acid exists  largely in a neutral, zwitterionic form

(a)  

1 ml protein solution and heated and added X solution to give a violet color indicates the presence of α-amino acids.

• Foli’s test

• Ninhydrin Test

• Million’s test

• None of these

 General test for compound having peptide bond is called

(a)  

Glycine is named because of

• Its sweet taste

• found in cheese

• FOUND in collagen protein supplements

• Related to Glucose

Amino acid forms which are non-superimposable mirror images of each other are

• Stereoisomers

• Enantiomers

• Racemic mixture

• All of these

Identify the L and D forms of alanine according to COORN rule

• Both are L Alanine

• Figure A is L Alanine

• Figure B has anticlockwise rotation

• Figure A is dextrorotatory and has S configuration

50% proportion of both S and R forms of compound in a mixture is called as

(a)  

Translate the amino acid sequence to one letter code Phe, Tyr, Cys, Thr, Arg, Gly

• P, Y,C,T,L,A,G

• P,Y,C,T,K,R,G

• F,Y,C,T,K,R,G

• F,T,C,T,L,A,G

Differentiate between Symmetrical and asymmetrical things

• All are symmetrical

• Snail is symmetrical

• CAR and snail both are asymmetrical

• Car is symmetrical