MCQs on Glucose

MCQs on Glucose

1. ????-D(+)-Glucose has how many asymmetric carbons?

(a) 4

(b) 3

(c) 6

(d) 5

Answer: (a)

2. In the process of glycolysis

(a) glucose is converted to haem

(b) glucose is oxidised to pyruvate

(c) pyruvate is converted to citrate

(d) glucose is oxidised to glutamate

Answer: (b)

3. The two hemiacetal isomers of glucose, ????-D-glucose and ????-D-glucose are

(a) diastereomers

(b) epimers

(c) enantiomers

(d) anomers

Answer: (d)

4. How many molecules of phenyl hydrazine react with glucose to produce glucosazone?

(a) 3

(b) 4

(c) 2

(d) 1

Answer: (a)

5. ????-D(+)-Glucopyranose and ????-D(+)-Glucopyranose differ in

(a) the size of the hemiacetal ring

(b) the number of OH group present

(c) configuration

(d) conformation

Answer: (c)

6. Hydrolysis of starch yields

(a) sucrose

(b) glucose

(c) fructose

(d) both (b) and (c)

Answer: (b)

7. The acetylation of glucose with acetic anhydride yields

(a) monoacetate

(b) triacetate

(c) hexaacetate

(d) pentaacetate

Answer: (d)

8. Which of the following enzymes converts maltose to glucose?

(a) Diastase

(b) Zymase

(c) Lactase

(d) Maltase

Answer: (d)

9. Which of the following enzymes converts glucose to ethanol?

(a) Zymase

(b) Invertase

(c) Diesterase

(d) Both (a) and (b)

Answer: (a)

10. ????-D-glucose and ????-D-glucose differ in the configuration of the OH group at which carbon?

(a) C₃

(b) C₂

(c) C₄

(d) C₁

Answer: (d)

11. Which of the following is formed on reduction of glucose?

(a) Sorbitol

(b) Mannitol

(c) Menthol

(d) Both (a) and (b)

Answer: (a)

12. Which of the following is the monomer of cellulose?

(a) Ribose

(b) Fructose

(c) Glucose

(d) Sucrose

Answer: (c)

13. Glucose gives positive silver mirror test with Tollen’s reagent due to the presence of

(a) acetal group

(b) aldehydic group

(c) keto group

(d) anomeric hydroxyl group

Answer: (b)

14. Which of the following pairs will give a positive test with Tollen’s reagent?

(a) Glucose and sucrose

(b) Glucose and fructose

(c) Sucrose and fructose

(d) Acetophenone and hexanal

Answer: (b)

15. When glucose reacts with bromine water it forms

(a) Glutaric acid

(b) Glyceraldehyde

(c) Saccharic acid

(d) Gluconic acid

Answer: (d)

16. The pyranose structure of glucose is due to the formation of hemiacetal and ring between

(a) C₂ and C₅

(b) C₁ and C₅

(c) C₁ and C₄

(d) C₁ and C₃

Answer: (b)

17. D-Glucose and D-Galactose are

(a) anomers

(b) epimers

(c) optical isomers

(d) none of the above

Answer: (b)

18. Cellulose is a polymer of

(a) D-glucose monomers joined by β-glycosidic linkages

(b) D-glucose monomers joined by α-glycosidic linkages

(c) D-galactose monomers joined by α-glycosidic linkages

(d) D-galactose monomers joined by β-glycosidic linkages

Answer: (a)

19. Fructose can be distinguished from glucose as

(a) it gives a positive Seliwanoff’s test

(b) it does not undergo hydrolysis

(c) it is a monosaccharide

(d) none of the above

Answer: (a)

20. Glucose is converted to mannose by

(a) racemisation

(b) anomerisation

(c) epimerisation

(d) none of the above

Answer: (c)