21. Which of the following is pot made of glucose (A) cellulose (8) glycogen (C)

Question

21. Which of the following is pot made of glucose (A) cellulose (8) glycogen (C) starch (D) chitin 22. A monosaccharide that is part of human e (A) glucose. (8) fructose. (C) ribose. (D) deoxyribose. (E) mannose 23. The molecule depicted below is most likely from what source (A) Plant (B) Animal (C) Sand 24. The following multifunctional compound is a(n) (A) nucleicacid. (B) Aldehyde. (C) ester. (D) amino acid. (E) protein. H.N-C-C-OH 25. Which substance is composed of molecules? (A) table salt (B) diamond (C) pure mercury (D) pure water 26, which substance is composed of ions? (ions=charged atoms or charged (A) Ice (solid water) (B) pure gold (C) graphite (D) table salt (E) diamond

Explanation / Answer

21.

(D) Chitin.

It is a polymer of N-acetylglucosamine, a derivative of glucose.

22.

(D) Deoxyribose which is a part of DNA

23.

(A) Plant

24.

(D) Amino acid. Because it has an amino group and carboxylic acid group.

25.

(D) Pure water is composed of water molecules.

26.

(D) Table salt is composed of Na+ and Cl- ions. It is an ionic compound.

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