Question

1. which of the following is an example of an inorganic molecule: a. hydrochloric acid b. an amino acid c. a fatty acid d. cholesterol e. rna 18. atomic mass is equivalent to the number of ____ in an atom. a. electrons b. protons and neutrons c. protons and electrons d. neutrons e. protons 19. glycogen is the storage form of __ in animals. a. amino acids b. lipids c. protein d. dna e. glucose 20. glucose and starch are examples of: a. triglycerides b. steroids c. proteins d. carbohydrates e. phospholipids 21. shell 1 of an atom can hold a maximum of ____ electron(s). a. 8 b. 1 c. 18 d. 4 e. 2 22. which of these substances is an enzyme: a. nucleotide b. omega - 3 fatty acid c. glucose d. oxidase e. triglyceride

Explanation:

1. Inorganic molecules lack carbon - hydrogen bonds. Hydrochloric acid (HCl) is inorganic, while amino acids, fatty acids, cholesterol, and RNA are organic.
2. Atomic mass is the sum of protons and neutrons in an atom's nucleus as electrons have negligible mass.
3. Glycogen is a polysaccharide and the storage form of glucose in animals.
4. Glucose is a monosaccharide and starch is a polysaccharide, both are carbohydrates.
5. The first electron shell (K - shell) of an atom can hold a maximum of 2 electrons.
6. Oxidase is an enzyme that catalyzes oxidation - reduction reactions. Nucleotides are building blocks of nucleic acids, omega - 3 fatty acid is a lipid, glucose is a carbohydrate, and triglyceride is a lipid.

Answer:

1. a. hydrochloric acid
2. b. protons and neutrons
3. e. glucose
4. d. carbohydrates
5. e. 2
6. d. oxidase