Chemistry Question Bank

Glucose and mannose are

Sucrose when boiled with dil. HCl produce

Sucrose in water is dextrorotatory, []D = + 66.4° when boiled with dil. HCl, the solution becomes laevo-rotatory, []D = – 39.9°. In this process the sucrose breaks into

Glycolysis is

Assertion: Activity of an enzyme is pH-dependent. Reason: Change in pH affects the solubility of the enzyme in water.

Assertion: DNA molecules and all RNA molecules are found in the nucleus of a cell. Reason: On heating, the enzymes do not lose their specific activity.

Assertion: Alpha -amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Reason: H ion given by carboxylic group (– COOH) is captured by amino group (–NH2) havin…

Assertion: Proteins on hydrolysis produce amino acids. Reason: Amino acids contain –NH2 and –COOH groups.

Assertion (A) Deoxyribose, C5H10O4 is not a carbohydrate. Reason: (R) Carbohydrates are hydrates of carbon so compounds which follow Cx(H2O)y formula are carbohydrates.

Assertion (A) Glucose gives reddish brown precipitate with Fehling solution. Reason (R) Reaction of glucose with Fehling solution gives CuO and gluconic acid.

Assertion: In sucrose two sugar units are joined by 1, 2-glycosidic bond Reason: It joins C1 of -glucose and C2 of -fructose by glycosidic bond.

Assertion: Glucose does not give 2, 4- DNP test. Reason: Glucose exists in cyclic hemiacetal form.

Assertion: Hydrolysis of sucrose is known as inversion of cane sugar. Reason: Sucrose is a disaccharide.

Assertion: Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis. Reason: Maltose has a 1,4’- -glycosidic linkage.

Assertion: Sucrose is a non-reducing sugar. Reason: It has glycosidic linkage.

The hormone which controls the processes like burning of fats, proteins and carbohydrates to liberate energy in the body is

Which one of the following is a peptide hormone ?

The cell membranes are mainly composed of

Which one of the following vitamins is water soluble?

The human body does not produce

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

Which functional group participates in disulphide bond formation in proteins ?

Which statement is incorrect about peptide bond?

Glucose and mannose are

Assertion: Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis. Reason: Maltose has a 1,4’- -glycosidic linkage.