Cheers OS201 Exam2

Question 1

Catabolic is to anabolic as is to

a. exergonic; spontaneous
b. exergonic; endergonic
c.
d. free energy; entropy
e. entropy; entalphy

Answer 1

b. exergonic; endergonic

Question 2

Which of the following processes does not involve net influx of energy from other sources?

a. ADP + Pi → ATP + H20
b. C6H12O6 + 6O2 → 6CO2 + 6O2 (it’s the only reaction that’s catabolic, hence it’s exergonic)
c. 6CO2 + 6H2O → C6H12O6 + 6O2 d. amino acids → proteins
e. glucose + fructose → sucrose

Answer 2

b. C6H12O6 + 6O2 → 6CO2 + 6O2 (it’s the only reaction that’s catabolic, hence it’s exergonic)

Question 3

In the TCA Cycle, substrate level phosphorylation occurs in which step?

a. Isocitrate ­> alpha­Ketoglutarate
b. Succinyl CoA ­> Succinate
c. Succinate ­> Fumarate d. Malate ­> Oxaloacetate

Answer 3

b. Succinyl CoA ­> Succinate

Question 4

not exact bwahaha. haba ng scenario, sorry) Your classmate takes Orlistat (blocks pancreatic lipase). This morning, she forgot to take them, but ate leftover fries from her review last night. What is the predominant glycerol derivative present in her intestinal lumen? (aayusin ko pa ‘to, nilalagay ko lang para di makalimutan :)))

a. glycerol
b. 1­monoacylglycerol
c. 2­monoacylglycerol
d. 3­monoacylglycerol

Answer 4

c. 2­monoacylglycerol

Question 5

Which of the following lipoproteins has the greatest amount of lipids in percentage weight?

a. HDL
b. LDL
c. VLDL
d. Chylomicrons

Answer 5

d. Chylomicrons

Question 6

The main function of HDL is that of being the repository for apoproteins that are required for the metabolism of chylomicrons and VLDL. Which are these apoprotein?
A. ApoA
B. ApoC
C. ApoE
D. B & C

Answer 6

no answer

Question 7

Through which intermediate of the TCA cycle do odd­numbered fatty acid oxidation products enter gluconeogenesis (something like that)?

a. alpha­ketoglutarate
b. succinyl coA
c. succinate d. fumarate

Answer 7

b. succinyl coA

Question 8

How is Acetyl CoA, which is produced in the mitochondria, transported into the cytoplasm for fatty acid synthesis?
A. Acetyl CoA is converted to Oxaloacetate
B. Acetyl CoA is converted to Citrate
C. Acetyl CoA is converted to Fumarate
D. acetyl CoA is converted to Malate

Answer 8

no naswer

Question 9

Which is true referring to the formation of cholesterol?
A. First principal site of cholesterol synthesis is in body
B. All carbons in the structure of cholesterol have origins in acetyl CoA
C. HMG CoA reductase is the rate limiting enzyme in cholesterol
D. All of the above

Answer 9

no answer

Question 10

Not verbatim) Enteropeptidase deficiency is an inborn defect that causes malabsorption of proteins. Which enzyme will perform normally in the presence of this defect?

a. trypsin
b. carboxypeptidase
c. pepsin
d. elastase

Answer 10

c. pepsin

Question 11

True of Maple Syrup Disease

Answer 11

accumulation of valine, isoleucine and leucine

Question 12

What is the best/most common method used in assessing protein quality?

Answer 12

Biological Value

Question 13

. Difference between vitamin A and E

a. RBC and WBC membrane protection (‘Di ako sure kung protection ‘yung term)
b. Antioxidant and immunity
c. Prevents night blindedness
d. Protection against (Sorry! Hindi ko maalala paglabas ko!) ­­epithelial cells
e. None of the above

Answer 13

no answer

Question 14

Which applies to both covalent & allosteric modification? A. Both involve regulation of enzymes
B. Both can be reversible/irreversible
C. Both involve the action of another enzyme
D. Only A and B

Answer 14

NA

Question 15

Fructose­6­PhosphateFructose­1,6­Bisphosphate
Which of the following statements describe this substrate cycle?
A. Equivalent amounts of fructose­6­phosphate and fructose­1,6­bisphophate formed.
B. A different enzyme catalyzes each reaction.
C. All substrate cycles are ultimately futile.
D. Substrate cycles are designed to ensure efficiency at all times.

Answer 15

B. A different enzyme catalyzes each reaction

Question 16

Amplification works in metabolic regulation by
A. Allowing a small amount of signal molecule to cause an increased intracellular transduction
B. Stimulating a signal at a long distance
C. An increase in the amount of ligand molecules

Answer 16

A. Allowing a small amount of signal molecule to cause an increased intracellular transduction

Question 17

Contrast between liver and muscle glycogen phosphorylase

Answer 17

NA

Question 18

What is true about the activity of GLUT4?

a. Found in all cells except the brain
b. Fatty acid increases activity of GLUT4 c. Insulin decreases activity of GLUT4
d. Anaerobic glycolysis increases activity of GLUT4

Answer 18

d. Anaerobic glycolysis increases activity of GLUT4

Question 19

What is the most significant implication of insulin resistance among the old aged
A. Elevated levels of insulin
C. High glucose level in postpandrial period

Answer 19

(i think letter C ang option nato. ang letter A ay elevated levels of insulin. Also, i think the answer is A. hihi thanks)