JEE Main - Biomolecules carbohydrates monosaccharides oligosaccharides and classification Online Test (MCQ Quiz)

1. What is the primary classification of carbohydrates based on their hydrolysis products?

A) Aldoses and Ketoses B) Monosaccharides, Disaccharides, and Polysaccharides C) Reducing and Non-reducing Sugars D) Linear and Cyclic Forms

2. Which class of carbohydrates yields only one monosaccharide unit upon complete hydrolysis?

A) Disaccharides B) Oligosaccharides C) Polysaccharides D) Monosaccharides

3. What is the defining characteristic of a monosaccharide?

A) It contains more than two glycosidic bonds. B) It cannot be hydrolyzed into simpler carbohydrates. C) It yields two to ten monosaccharide units upon hydrolysis. D) It is composed solely of amino acids.

4. Which functional group is characteristic of aldoses?

A) Ketone group B) Aldehyde group C) Hydroxyl group D) Carboxyl group

5. Which functional group is characteristic of ketoses?

A) Aldehyde group B) Hydroxyl group C) Ketone group D) Amine group

6. Glucose is an example of which type of monosaccharide?

A) A ketose B) An aldose C) A disaccharide D) A polysaccharide

7. Fructose is an example of which type of monosaccharide?

A) An aldose B) A ketose C) A disaccharide D) An amino sugar

8. What does the term 'triose' refer to in carbohydrate nomenclature?

A) A carbohydrate with three hydroxyl groups. B) A carbohydrate with three carbon atoms. C) A carbohydrate with three glycosidic linkages. D) A carbohydrate with three ketose units.

9. Which of the following is a common hexose monosaccharide?

A) Ribose B) Erythrose C) Glucose D) Glyceraldehyde

10. What is the molecular formula of glucose?

A) C5H10O5 B) C6H12O6 C) C12H22O11 D) C6H10O5

11. What is the molecular formula of fructose?

A) C5H10O5 B) C6H12O6 C) C12H22O11 D) C6H12O5

12. Which monosaccharide is also known as fruit sugar?

A) Glucose B) Galactose C) Fructose D) Mannose

13. What is a glycosidic bond?

A) A bond between two amino acids. B) A bond formed between the anomeric carbon of one monosaccharide and a hydroxyl group of another. C) A bond found in proteins. D) A bond linking fatty acids to glycerol.

14. Which class of carbohydrates yields between two to ten monosaccharide units upon complete hydrolysis?

A) Monosaccharides B) Disaccharides C) Oligosaccharides D) Polysaccharides

15. Sucrose is an example of which type of carbohydrate?

A) Monosaccharide B) Disaccharide C) Oligosaccharide D) Polysaccharide

16. Lactose is an example of which type of carbohydrate?

A) Monosaccharide B) Disaccharide C) Oligosaccharide D) Polysaccharide

17. What are the constituent monosaccharides of sucrose?

A) Glucose and Glucose B) Glucose and Fructose C) Galactose and Glucose D) Fructose and Fructose

18. What are the constituent monosaccharides of lactose?

A) Glucose and Glucose B) Glucose and Fructose C) Galactose and Glucose D) Fructose and Galactose

19. What are the constituent monosaccharides of maltose?

A) Glucose and Glucose B) Glucose and Fructose C) Galactose and Glucose D) Fructose and Fructose

20. Which disaccharide is commonly known as milk sugar?

A) Sucrose B) Maltose C) Lactose D) Cellobiose

21. Which disaccharide is commonly known as table sugar?

A) Lactose B) Maltose C) Sucrose D) Trehalose

22. Which disaccharide is known as malt sugar?

A) Lactose B) Sucrose C) Maltose D) Isomaltose

23. What type of linkage is typically found between glucose units in starch?

A) α-1,4 glycosidic linkage B) β-1,4 glycosidic linkage C) α-1,6 glycosidic linkage D) β-1,6 glycosidic linkage

24. Which of the following is NOT a polysaccharide?

A) Starch B) Cellulose C) Sucrose D) Glycogen

25. What is the primary structural polysaccharide in plants?

A) Starch B) Glycogen C) Cellulose D) Chitin

26. Starch is a polymer of which monosaccharide?

A) Fructose B) Galactose C) Sucrose D) Glucose

27. Glycogen is the storage form of glucose in which organisms?

A) Plants B) Animals and Fungi C) Bacteria D) Algae

28. What is the main structural component of the cell walls of fungi and the exoskeletons of arthropods?

A) Cellulose B) Starch C) Chitin D) Peptidoglycan

29. Which polysaccharide is indigestible by most animals due to its β-1,4 glycosidic linkages?

A) Starch B) Glycogen C) Cellulose D) Amylopectin

30. What is the difference between amylose and amylopectin?

A) Amylose is branched, amylopectin is linear. B) Amylose contains α-1,6 linkages, amylopectin contains α-1,4 linkages. C) Amylose is linear with α-1,4 linkages, amylopectin is branched with α-1,4 and α-1,6 linkages. D) Amylose is made of fructose, amylopectin is made of glucose.

31. Which monosaccharide has the formula C5H10O5?

A) Glucose B) Ribose C) Fructose D) Glyceraldehyde

32. Ribose is a pentose sugar found in:

A) Starch B) RNA and ATP C) Cellulose D) Glycogen

33. Deoxyribose is a pentose sugar found in:

A) RNA B) ATP C) DNA D) Cellulose

34. What is the primary difference between ribose and deoxyribose?

A) Deoxyribose has one less oxygen atom at the C-2 position. B) Ribose has one less oxygen atom at the C-2 position. C) Deoxyribose has an aldehyde group instead of a ketone. D) Ribose has a ketone group instead of an aldehyde.

35. A carbohydrate that gives a positive test with Benedict's reagent is called a:

A) Non-reducing sugar B) Reducing sugar C) Polysaccharide D) Ketose

36. Which of the following is a non-reducing sugar?

A) Glucose B) Fructose C) Sucrose D) Maltose

37. All monosaccharides are:

A) Non-reducing sugars B) Reducing sugars C) Disaccharides D) Complex carbohydrates

38. What is the anomeric carbon in a monosaccharide?

A) The carbon atom with the aldehyde or ketone group. B) The carbon atom bonded to two oxygen atoms in the cyclic form. C) The terminal carbon atom. D) The carbon atom furthest from the carbonyl group.

39. The cyclic forms of monosaccharides exist as α and β anomers, which are:

A) Enantiomers B) Diastereomers C) Epimers D) Structural isomers

40. Epimers are stereoisomers that differ in configuration at:

A) Only one chiral center B) The anomeric carbon C) Any chiral center D) The carbon atom with the carbonyl group

41. Glucose and galactose are examples of:

A) Enantiomers B) Diastereomers C) Epimers D) Anomers

42. What is the common name for α-D-glucopyranose?

A) Fructose B) Maltose C) Glucose D) Cellobiose

43. What is the common name for β-D-fructofuranose?

A) Glucose B) Sucrose C) Fructose D) Lactose

44. In the Haworth projection of a cyclic monosaccharide, the oxygen atom is typically shown:

A) At the bottom right B) At the top right C) At the top left D) At the bottom left

45. What is the term for a carbohydrate that is a polymer of more than two monosaccharide units, but not necessarily a very large polymer?

A) Monosaccharide B) Disaccharide C) Oligosaccharide D) Polysaccharide

46. Which type of carbohydrate is generally not sweet and is often insoluble in water?

A) Monosaccharides B) Disaccharides C) Oligosaccharides D) Polysaccharides

47. Which polysaccharide serves as a reserve food material in animals?

A) Cellulose B) Starch C) Glycogen D) Chitin

48. What is the empirical formula for most carbohydrates?

A) Cx(H2O)y B) CxHyOz C) CnH2n+2 D) CnHn

49. Which of the following is a pentose monosaccharide?

A) Glucose B) Fructose C) Ribose D) Galactose

50. Which of the following is a hexose monosaccharide?

A) Ribose B) Xylose C) Fructose D) Arabinose

Biomolecules carbohydrates monosaccharides oligosaccharides and classification - Online Test

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