221.

Which one of the following statements is not true regarding (+) lactose?

• (+) lactose is a  β - glycoside formed by the union of a molecule of D (+) galactose

• (+) lactose is a reducing sugar and does not exhibit mutarotation

• (+) lactose, C₁₂H₂₂O₁₁ contains 8 - OH groups

• (+) lactose, C₁₂H₂₂O₁₁ contains 8 - OH groups

Which of the following is not a fat soluble vitamin?

• Vitamin- B - complex

• Vitamin -D

• Vitamin -E

• Vitamin -E

Which of the statement about 'Denaturation' given below are correct?
Statements,

A) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
B) Denaturation leads to the conversion of double strand of DNA into single strand.
C) Denaturation affects primary structure which gets distroyed.

• (B) and (C)

• (A) and (C)

• (A) and (B)

• (A) and (B)

Which one of the following species does not exist under normal conditions?

• (+)Sucrose

• (+)Lactose

• (+) Maltose

• (+) Maltose

Fructose reduces Tollen's reagent due to 

• asymmetric carbons

• primary alcoholic group

• secondary alcoholic group

• secondary alcoholic group

The segment of DNA, which acts as the instrumental manual for the synthesis of the protein is 

• nucleotide

• ribose

• gene

• gene

In DNA. the complimentary bases are 

• Adenine and thymine; guanine and cytosine

• Adenine and thymine; guanine and uracil

• Adenine and guanine, thymine: Guanine and uracil

• Uracil and adenine; cytosine and guanine

Which one of the following vitamins is water soluble? 

• vitamin - B

• vitamin - E

• vitamin - K

• vitamin - K

RNA and DNA are chiral molecules, their chirality is due to:

• L -sugar component

• chiral bases

• chiral phosphate ester units

• chiral phosphate ester units

During the process of digestion, the proteins present in food materials are hydrolysed in amino acids. The two enzymes involved in the process


are respectively:

• amylase and maltase

• diastase and lipase

• pepsin and trypsin

• pepsin and trypsin