Biomolecules

What type of linkage is present in βpleated sheet of protein?

• A.Intermolecular H bonding

• B.Intramolecular H bonding

• C.Peptide linkage

• D.Disulphide linkage

Which of the following sugar is non reducing sugar?

• A.Sucrose

• B.Glucose

• C.Fructose

• D.Lactose

Which of the following amino acids is optically inactive?

• A.Lysine

• B.Tyrosine

• C.Alanine

• D.Glycine

Which of the following reagents is used to convert glucose into saccharic acid?

• A.NH2OH

• B.HNO3

• C.Br2 water

• D.HI

Which of the following proteins is classified as fibrous protein?

• A.Insulin

• B.Haemoglobin

• C.Keratin

• D.Albumin

Which of the following reactions of glucose can be explained only by its cyclic

structure?

• A.Glucose forms gluconic acid.

• B.Glucose forms pentaacetate

• C.Glucose reacts with hydroxylamine

• D.Pentaacetate of glucose does not react with hydroxylamine

Within the list shown below,

the correct pair of structures of alanine

in pH ranges 2-4 and 9-11 is

• H3N-CH(CH3)CO2H

• H2N-CH(CH3)CO2

• H3N-CH(CH3)CO2

• H2N-CH(CH3)CO2H

Which of the following sets consists only of essential amino acids?

• A.Alanine, tyrosine, cysteine

• B.Leucine, lysine, valine

• C.Alanine, Glutamine, lysine

• D.Leucine, proline, glycine

Assertion: D-(+)-Glucose is levorotatory sugar

Reason: D in glucose correlated to (+)isomer of glyceraldehyde.

• A.Both A & R are correct and R is the correct explanation 

• B. Both A & R are correct but R is not the correct explanation 

• C.A is the correct statement but R is wrong

• D.Both A & R are wrong. OR A is wrong & R is correct

Assertion:On electrolysis in acidic solution, amino acids migrate towards cathode.

Reason:In acidic solution carboxylate ion accepts proton and forms negative ion.

• A.Both A & R are correct and R is the correct explanation 

• B. Both A & R are correct but R is not the correct explanation 

• C.A is the correct statement but R is wrong

• D.Both A & R are wrong. OR A is wrong & R is correct