NEET UG - Carbohydrates classification monosaccharides oligosaccharides and constituent monosaccharides Online Test (MCQ Quiz)

1. What is the primary classification criterion for carbohydrates?

A) Presence of nitrogen B) Number of carbon atoms C) Sweetness D) Number of hydroxyl groups and carbonyl group type

2. Which term describes carbohydrates that cannot be hydrolyzed further into simpler sugars?

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

3. Glucose and fructose are examples of which class of carbohydrates?

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

4. Carbohydrates that yield two to ten monosaccharide units upon hydrolysis are classified as:

A) Monosaccharides B) Oligosaccharides C) Polysaccharides D) Amino acids

5. Sucrose, lactose, and maltose are common examples of:

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

6. Which type of carbohydrate yields a large number of monosaccharide units upon complete hydrolysis?

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

7. Starch, cellulose, and glycogen are examples of:

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

8. What is the general formula for carbohydrates?

A) C_n(H_2O)_m B) C_n(H_2O)_n C) C_mH_{2n}O_n D) C_n(H_2O)_{n+1}

9. Monosaccharides with an aldehyde group are called:

A) Ketoses B) Aldoses C) Aldehydes D) Ketones

10. Monosaccharides with a ketone group are called:

A) Aldoses B) Ketoses C) Alcohols D) Carboxylic acids

11. What is the simplest aldose monosaccharide?

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

12. What is the simplest ketose monosaccharide?

A) Glyceraldehyde B) Dihydroxyacetone C) Erythrose D) Xylulose

13. Glucose is an example of an aldose with how many carbon atoms?

A) 3 B) 4 C) 5 D) 6

14. Fructose is an example of a ketose with how many carbon atoms?

A) 3 B) 4 C) 5 D) 6

15. Which monosaccharide is known as blood sugar?

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

16. Which monosaccharide is also known as fruit sugar?

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

17. Galactose is an epimer of which common monosaccharide?

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

18. Ribose is a pentose sugar found in:

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

19. Deoxyribose, a component of DNA, is a derivative of which pentose sugar?

A) Ribulose B) Xylulose C) Ribose D) Arabinose

20. What type of bond links monosaccharides in oligosaccharides and polysaccharides?

A) Peptide bond B) Ester bond C) Glycosidic bond D) Hydrogen bond

21. Sucrose is a disaccharide composed of which two monosaccharides?

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

22. Lactose, milk sugar, is a disaccharide composed of:

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

23. Maltose, malt sugar, is a disaccharide composed of:

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

24. Cellobiose is a disaccharide composed of two units of:

A) Alpha-glucose B) Beta-glucose C) Fructose D) Galactose

25. Trehalose is a disaccharide composed of two units of:

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

26. When a monosaccharide like glucose forms a ring structure, it can exist in alpha (α) and beta (β) anomeric forms. These forms are called:

A) Tautomers B) Epimers C) Anomers D) Isomers

27. The cyclic form of glucose is predominantly formed through the reaction between the aldehyde group and which hydroxyl group?

A) C2 hydroxyl B) C3 hydroxyl C) C4 hydroxyl D) C5 hydroxyl

28. The cyclic form of fructose is predominantly formed through the reaction between the ketone group and which hydroxyl group?

A) C1 hydroxyl B) C3 hydroxyl C) C5 hydroxyl D) C6 hydroxyl

29. Which of the following is NOT a monosaccharide?

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

30. Which of the following is NOT a disaccharide?

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

31. What is the common name for alpha-D-glucopyranosyl-(1→4)-D-glucose?

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

32. What is the common name for beta-D-glucopyranosyl-(1→4)-D-glucose?

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

33. In the glycosidic linkage of sucrose (α-D-glucopyranosyl-(1→2)-β-D-fructofuranoside), which carbon atoms are involved?

A) C1 of glucose and C4 of fructose B) C1 of glucose and C2 of fructose C) C2 of glucose and C1 of fructose D) C4 of glucose and C1 of fructose

34. In the glycosidic linkage of lactose (β-D-galactopyranosyl-(1→4)-D-glucopyranose), which carbon atoms are involved?

A) C1 of galactose and C4 of glucose B) C1 of galactose and C2 of glucose C) C4 of galactose and C1 of glucose D) C2 of galactose and C1 of glucose

35. What is the significance of the term 'D' in D-glucose?

A) Indicates dextrorotatory optical activity B) Relates to the configuration of the highest numbered chiral center C) Denotes the presence of a double bond D) Specifies the number of carbon atoms

36. What is the significance of the term 'L' in L-glucose?

A) Indicates levorotatory optical activity B) Relates to the configuration of the lowest numbered chiral center C) Denotes a cyclic structure D) Specifies the presence of a ketone group

37. Which monosaccharide has the molecular formula C5H10O5?

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

38. Which monosaccharide has the molecular formula C6H12O6?

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

39. The carbohydrate classification 'oligosaccharide' typically includes saccharides that yield how many monosaccharide units upon hydrolysis?

A) 2 to 10 B) 11 to 20 C) More than 20 D) Exactly 2

40. Which of the following is a trisaccharide?

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

41. Raffinose, a trisaccharide, is composed of:

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

42. Which monosaccharide is a structural isomer of glucose?

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

43. The term 'carbohydrate' literally means:

A) Carbon and water B) Hydrated carbon C) Sweet carbon D) Energy source

44. Which of the following is a common characteristic of monosaccharides?

A) They are always sweet. B) They contain at least one hydroxyl group and one carbonyl group. C) They are insoluble in water. D) They are complex polymers.

45. What is the anomeric carbon in a cyclic monosaccharide?

A) The carbon atom bonded to two oxygen atoms. B) The carbon atom that was originally the carbonyl carbon. C) The carbon atom with the most hydroxyl groups. D) The carbon atom furthest from the carbonyl group.

46. Which of the following is a classification of monosaccharides based on the number of carbons?

A) Aldose, Ketose B) Hexose, Pentose C) Alpha, Beta D) D, L

47. A carbohydrate that yields only glucose units upon hydrolysis is:

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

48. Which of the following is NOT a constituent monosaccharide of common disaccharides?

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

49. The glycosidic bond in polysaccharides like starch and cellulose is formed by the removal of:

A) A carbon dioxide molecule B) A water molecule C) An oxygen atom D) A hydrogen atom

Carbohydrates classification monosaccharides oligosaccharides and constituent monosaccharides - Online Test

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