Chapter 5 Review

1. c
2. a
3. c
4. b
5. b
6. d
7. a
8. I might consume a big bowl of pasta because I want to store energy for the race and not to be too nervous.
9. Glucose, sucrose, and starch are all saccharides, and they follow the same chemical structure.
10. Steroids are lipid molecule with four fused carbon rings. One type of steroid circulate in our body as chemical signals, and the other one are the steroids estrogen
11. Proteins and polypeptides are both fromed by amino acids linking together.
12.
14.a) H2O
b) It's a chemical reaction, becuase when two amino acids join together, they from a new substance
c) The front part and the back part
15.a) Enzyme A performs best at about 37 ℃. Enzyme B performs best about 77℃
b) Enzyme A is in humans, and Enzyme B is in thermophilic bacteria.
c) IF a huaman's body temperature is above 40℃, that person must have caught a fever, enzyme only works in certain temperature. 40℃ is too hot for enzyme.