241.

Which of the following is not reducing sugar?

• Glucose

• Fructose

• Lactose

• Sucrose

Aniline in a set of reactions yielded a product D

The structure of the product D would be

• C₆H₅CH₂NH₂

• C₆H₅NHCH₂CH₃

• C₆H₅NHOH

• C₆H₅CH₂OH

which of the following reactions of glucose can be explained only by its cyclic structure?

• Glucose forms penta acetate.

• Glucose reacts with hydroxyl amine to form an oxime.

• Penta acetate of glucose does not react with hydroxylamine.

• Glucose is oxidised by nitirc acid to gluconic acid.

The theory of enzyme mechanism that suggests a rigid, in flexible molecules is:

• coenzyme model.

• induced-fit model.

• lock and key model.

• substrate specific model.

Which functional group participates in disulphide bond formation in proteins?

• Thiolactone

• Thiol

• Thioether

• Thioester

The chirality of the compound

• R

• S

• Z

• E

The night blindness and pernicious anaemia are causes due to deficiency of:

• Vitamin B₆ and vitamin B_12, respectively

• Vitamin A and vitamin B₁₂ respectively

• Vitamin C and vitamin K, respectively

• Vitamin B₂ and vitamin B₁₂ respectively

Which of the following amino acid is optically inactive?

• Phenyl alanine

• Glycine

• Glutamic acid

• Asparagine

Glucose has difference from fructose in that it:

• does not undergo hydrolysis

• gives silver mirror with Tollen's reagent

• monosaccharide

• none of the above

Which of the following pair will give positive tollen's test?

• Glucose, sucrose

• Glucose, fructose

• Hexanol, acetophenone

• Fructose, sucrose