Download Chem 150 quiz #6

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Chem 150: Quiz #6
May 10 & 11, 2010
Name: _____________________
Digestion:
1. Where does digestion of polysaccharide occur?
a. stomach and small intestine
b. mouth and stomach
c. mouth and small intestine
d. mouth, stomach, and small intestine
e. none of the above
2. Triglyceride digestion is initiated in the __________.
a. mouth
b. stomach c. small intestine
d. liver
e. none of the above
3. The hydrolysis of triglycerides is performed by the _____________ enzyme.
a. pepsin
b. amylase c. chymotrypsin
d. glycerase
e. none of the above
4. Starch digestion is initiated by the enzyme ___________.
a. lipase
b. amylase
c. hexokinase
d. glucokinase
e. none of the above
5. _____ is the sum of all of the reactions that take place in a living thing.
a. metabolism b. catabolism
c. anabolism
d. hydrolysis
e. none of the above
6. _____ is defined as the reactions that biosynthesize large molecules from small molecules
consuming energy in the form of ATP.
a. metabolism b. catabolism c. anabolism d. hydrolysis
e. none of the above
7. Protein synthesis is a form of __________.
a. metabolism b. catabolism
c. anabolism
d. hydrolysis
e. none of the above
8. A metabolic pathway in which a series of reactions is used to repeatedly break down or build
up a molecule is defined as a ___________ pathway.
a. linear b. circular c. spiral d. coupled e. none of the above
Glycolysis:
9. Glycolysis is a(n) _______ process.
a. anabolic
b. catabolic c. synthesis
d. digestion
e. none of the above
10. Will the coupled reaction using the two reactions below be spontaneous or nonspontaneous?
ATP + H2O ----> ADP + Pi
Glucose + Pi ----> Glucose-6-Pi + H2O
a. spontaneous
b. non-spontaneous
G = -7.3 kcal
G = +3.3 kcal
c. cannot be predicted
11. Glycolysis occurs in _______________ .
a. the matrix of mitochondrion
b. the outer membrane of the mitochondrion
c. inner membrane of the mitochondrion
d. the cytoplasm of the cell
e. none of the above
12. Which step in glycolysis involves oxidation and reduction?
a. steps 1 and 2 b. step 2 only c. step 4 only d. step 6 only
e. none of the above
2
13. In yeast cells pyruvate is converted into __________.
a. lactate
b. acetyl-CoA
c. ketones
d. ADP
e. none of the above
14. Which reactions in Glycolysis consume ATP? Answer: Reaction _______ .
a. 1 only
b. 7 and 10
c. 6 only
d. 1 and 3
15. What type of reaction is reaction #5 in Glycolysis?
a. transfer
b. oxidation-reduction c. isomerization
e. 1, 3, 7 and 10
d. hydrolysis
16. Which step or steps in glycolysis involve isomerization?
a. 2 only
b. 2 and 5 only
c. 5 only
d. 7 and 10 only
e. hydration
e. none of the above
17. What is the total net yield of ATP obtained when 5 glucose molecules are catabolized
through glycolysis? (Note: The end product of glycolysis has not entered the TCA cycle yet.)
a. 2 ATP
b. 28 – 29 ATP
c. 30 – 32 ATP
d. 18 ATP
e. none of the above
18. How many molecules of pyruvate would be obtained if 3 molecules of glucose are
degraded to pyruvate in Glycolysis?
a. 3 b. 4 c. 6 d. 8 e. 12
19. Which reaction in glycolysis involves the breaking of a C-C bond?
a. step 10
b. step 2
c. step 5
d. step 9
e. none of the above
20. What final product is formed from pyruvate when it undergoes anaerobic respiration in our
cells?
O
a. CH3CH and CO2
b. CH4 and 2 CO2
d. CH3CHCO2- (or lactate)
c. CH3CH2OH and CO2
e. none of the above
OH
21. What purpose does the reaction in question # 20 serve?
a. to supply FAD for Citric Acid cycle
b. to supply NAD+ for Citric Acid cycle
c. to supply NADH for Citric Acid cycle
d. to supply ADP for glycolysis
e. none of the above
Citric Acid Cycle:
22. Which of the choices present products of the citric acid cycle?
a. ATP, ADP, and CO2
b. NADH, FADH2, CO2 and GTP
c. FAD, NAD+, ADP, and H2O
d. CO2, H2O, ATP, and GTP, and NAD+
23. Which reaction in the TCA cycle is or are hydration reaction?
a. 3 b. 4
c. 5 d. 6 e. 7
24. How many FAD would be consumed at the TCA cycle per 6 glucose molecules?
a. 1
b. 2
c. 10
d. 13
e. none of the above