The chapter 5 review questions

1. Which of the following is not an organic molecule?

a. cellulose b. sucrose c. water d. testosterone
Answer: C. water



2. Which of the following terms includes all the other terms on this list?a. polysaccharide b. carbohydrate c. monosaccharide d. glycogen
Answer: B. Carbohydrate

3. Which term is most appropriate to describe a molecule that dissolves easily in water? a. hydrocarbon b. hydrophobic c. hydrophilic d. organic
Answer: C. Hydrophilic

4. Cholesterol is an example of what kind of molecule?a. protein b. lipid c. amino acid d. carbohydrate

Answer: B. Lipid


5. The 20 amino acids vary only in their a. carboxyl groups. b. side groups .c. amino groups. d. lipid groups.
Answer: C. Amino groups

6. A specific reactant an enzyme acts upon is called the a. catalyst. b. sucrase. c. active site. d. substrate.
Answer: a. Catalyst

7. An enzyme does which of the following?

a. adds heat to a reaction, speeding it up b. lowers the activation energy of a reaction c. cools a reaction, slowing it down d. raises the activation energy of a reaction
Answer: D. Raise the activation energy of a reaction



Short Answer8. Besides satisfying your hunger, why else might you consume a big bowl of pasta the night before a race?


9. How are glucose, sucrose, and starch related?

They are all used as energy for a animal. and plants.




10. What are steroids? Describe two functions they have in cells.
One of function is hydrophobic, circulates our body in our body as

chemical signals.

11. How are polypeptides related to proteins?
Both are made out of amino acid



12. How does denaturation affect the ability of a protein to function?