Question 1

After reading the paragraph below, answer the question(s) that follow(s).
As a scientist employed by the Health Products and Food Branch of Health Canada, you've been asked to sit on a panel to evaluate a pharmaceutical company's application for approval of a new weight loss drug called Fat Away. The company has submitted a report summarizing the results of their animal and human testing. In the report, it was noted that Fat Away works by affecting the electron transport chain. It decreases the synthesis of ATP by making the mitochondrial membrane permeable to HS1U1P1+S1S1P0, which allows HS1U1P1+S1S1P0 to leak from the intermembrane space to the mitochondrial matrix. This effect leads to weight loss.
-The most obvious possible side effect of Fat Away that Health Canada might be particularly concerned with would be

Accepted Answer

A)   increasing the incidence of cancer.
B)   the potentially lethal collapse of ATP levels in critical cells.
C)   off target effects of the drug on organelles other than mitochondria.
D)   the inhibition of glycolysis. B

Question 2

In plants, light harvesting pigments are built into the ________ membrane.

Accepted Answer

A)   chloroplast
B)   stroma
C)   thylakoid
D)   chlorophyll C

Question 3

After reading the paragraph below, answer the question(s) that follow(s).
As a scientist employed by the Health Products and Food Branch of Health Canada, you've been asked to sit on a panel to evaluate a pharmaceutical company's application for approval of a new weight loss drug called Fat Away. The company has submitted a report summarizing the results of their animal and human testing. In the report, it was noted that Fat Away works by affecting the electron transport chain. It decreases the synthesis of ATP by making the mitochondrial membrane permeable to HS1U1P1+S1S1P0, which allows HS1U1P1+S1S1P0 to leak from the intermembrane space to the mitochondrial matrix. This effect leads to weight loss.
-The method of weight loss described for Fat Away shows that the drug is acting as a metabolic

Accepted Answer

A)   feedback inhibitor.
B)   oxygen carrier.
C)   redox promoter.
D)   uncoupler. D

Question 4

The process in which an enzyme transfers a phosphate group from a substrate molecule directly to ADP, thus forming ATP, is called

Accepted Answer

A)   oxidative phosphorylation.
B)   oxidation.
C)   substrate-level phosphorylation.
D)   metabolic phosphorylation.

Question 5

What is not included in the adenosine part of an ATP molecule?

Accepted Answer

A)   nitrogenous base
B)   ribose
C)   five-carbon sugar
D)   three phosphate groups

Question 6

What are organisms that use metabolic processes to harvest the energy of light called?

Accepted Answer

A)   heterotrophs
B)   autotrophs
C)   bacteriatrophs
D)   photoautotrophs

Question 7

How many pyruvate molecules are produced by glycolysis?

Accepted Answer

A)   1
B)   3
C)   4
D)   2

Question 8

After reading the paragraph below, answer the question that follows.
In cold blooded (ectothermic) animals changes in environmental temperature are felt throughout the organism. All cellular functions will potentially be affected by these thermal changes. At low but above zero temperatures, cell membranes may effectively freeze, and this is a major problem that must be avoided by ectotherms living in temperate environments like much of Canada.
-What are the repercussions of membrane freezing?

Accepted Answer

A)   It will cause the composition of the membranes to change.
B)   It will prevent the movements of proteins within membranes.
C)   It will cause membranes to fall apart.
D)   It will cause membranes to fuse.

Exam 3: Photosynthesis , Cellular Function and How Cells Harvest Chemical Energy

In plants, light harvesting pigments are built into the ________ membrane.

The process in which an enzyme transfers a phosphate group from a substrate molecule directly to ADP, thus forming ATP, is called

What is not included in the adenosine part of an ATP molecule?

What are organisms that use metabolic processes to harvest the energy of light called?

How many pyruvate molecules are produced by glycolysis?