Which of the following pairs give positive Tollen's test?

• Glucose, sucrose

• Glucose, fructose

• hexaual, acetophenone

• Fructose, sucrose

Identify the nucleoside from the following :

Hormone that maintains the blood glucose level within the limit is

• thyroxine

• Insulin

• testosterone

• epinephrine

D-mannose $\stackrel{{\mathrm{HO}}^{-}}{\rightleftharpoons } \mathrm{D}-\mathrm{glucose} \stackrel{{\mathrm{HO}}^{-}}{\rightleftharpoons }$(A) Product

(A) of above reaction is

• D-fructose

• D-talose

• D-idose

• D-glucose

The number of complementary hydrogen bond(s) between a guanine and cytosine

• 2

• 1

• 4

• 3

Maltose on treatment with dilute HCl gives:

• D – glucose and D-Fructose

• D – glucose

• D-Fructose

• D-Galactose

Fructose and glucose can be distinguished by :

• Barfoed's test

• Benedict's test

• Seliwanoff’s test

• Fehling’s test

Amylopectin is composed of:

• β-D-glucose C₁-C₄ and C₂-C₆ linkages

• β-D-glucose C₁-C₄ and C₁-C₆ linkages

• α-D-glucose C₁-C₄ and C₂-C₆ linkages

• α-D-glucose C₁-C₄ and C₁-C₆ linkages

Which of the following statement is not true about sucrose?

• On hydrolysis, it produces glucose and fructose

• It is also named as invert sugar

• It is non-reducing sugar

• The glycosidic linkage is present between C₁ of α-glucose and C₁ of β- fructose.

490.

In a protein molecule various amino acids are linked together by

• β-glycosidic bond

• peptide bond

• dative bond

• dative bond