Page 106 #1-12,14,15

1. Which of the following is not an organic molecule?
a. cellulose
b. sucrose
c. water
d. testosterone


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


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


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


5. The 20 amino acids very only in their
a. carbozyl groups
b. side groups
c. amino groups
d. lipid groups


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


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 enevergy of a reaction


8. Besides satisfying your hunger, why else might you consume a big bowl of pasta the night before a race?
It is because pasta consists whole loads of energy in it which will help me to use the energy during race.


9. How are glucose, sucrose, and starch related?
They are all monosaccharides.


10. What are steroids? Describe two functions they have in cells.
A female sex hormone and a male sex hormone and the structural formation of steroid differs in its fuction.


11. How are polypeptides related to proteins?
Proteins are the main factor that build up the polypeptides.


12. How does denaturation affect the ability of a protein to function?
denaturation change the portein's shape and make it not to function in proper way.


14. The reaction below shows two amino acids joining together.
a. One product of this reaction is represented by a question makr. Which molecule is it?
Water molecule
b. What is this kind of reaction called? Explain.
Dehydration reaction is the reaction taking place while water molecule is released when bonds are created.
c. If an amino acid were added to this chain, at what two places could it attach?
Side groups and amino groups.


15. Use the graph to answer the questions below.
a. At which temperature does enzyme A perform best? Enzyme B?
Enzyme A: 37 degrees
Enzyme B: 77 degrees


b. Knowing that one of these enzymes is found in humans and the other in thermopilic(heat-loving) bacteria, hypothesize which enzyme came from which organism.
Enzyme A: human
Enzyme B: thermophilic bacteria


c. Propose a hypothesis that explains why the rate of the reaction catalyzed by enzyme A slows down at temperatures above 40˚C.
The reaction is almost to the end.