Exam (elaborations)

BIOC13 Sample MCQ and SA Question and Answers for Midterm

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Course
BIOC13 (BIOC13)

Institution
University Of Toronto (U Of T )

2023 Winter Midterm Sample with Prof Bawa. Includes full answers for mcq and written questions.

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Uploaded on March 21, 2024
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Type Exam (elaborations)
Contains Questions & answers

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BIOC13 SAMPLE QUESTIONS – WINTER 2023

1. The process by which nutrients are degraded in order to salvage their components and/or
to generate energy is most specifically called:
a) metabolism
b) anaerobism
c) catabolism
d) anabolism
e) glycolysis

2. A spontaneous process

a) occurs without the addition of free energy.
b) has a G<0.
c) is exergonic.
d) All of the above
e) None of the above

3. Which statement(s) explain why many biochemical processes are carried out via multi-
step pathways rather than by single-step reactions (or only a few steps)?

a) Multi-step pathways allow for more control points to regulate biochemical processes.
b) Sharing of intermediates between pathways is facilitated this way.
c) The end products of most pathways can usually be produced only by the pathway
reactions that nature has evolved.
d) There is greater control over the amounts of energy that are consumed or released at
any one time.
e) All of the above

4. Considering the reaction: XH2 + NAD+ → X + NADH + H+. In this reaction X is said to
be:

a) an enzyme.
b) storing two hydrogen atoms.
c) reduced.
d) oxidized.
e) a catalyst.

, Name:_____________________ Student Number: ______________

5. Hydrolases catalyze the following type(s) of reaction(s):

a) splitting a molecule using water.
b) conversions between isomers.
c) reactions in which double bonds are formed.
d) oxidation-reduction reactions.
e) None of the above.

6. Which one of these is a phosphorylation reaction:

a) glucose + fructose → sucrose + H2O
b) glucose + ATP → glucose 6-phosphate + ADP
c) glucose 6-phosphate + fructose → sucrose + Pi
d) glucose + glucose → maltose
e) None of these are phosphorylation reactions

7. Select the enzyme that does not match the reaction as suggested by its name:

a) sucrase: splits sucrose into glucose and fructose
b) lipase: breaks down lipids
c) phosphatase: removes phosphate groups
d) urease: converts urea to ammonia and CO2
e) kinase: breaks peptide bonds

8. ATP allosterically inhibits the enzyme, PFK-1, that catalyzes the third step of glycolysis.
This is an example of ________.

a) Feedback inhibition
b) Feed forward activation
c) Competitive inhibition
d) Negative cooperativity
e) Malfunctioning enzyme

9. Which of the following enzymes catalyzes the transfer of a phosphoryl group from ATP
to glucose?
a) Hexokinase
b) Phosphoglucose isomerase
c) Glucose-6-phosphatase
d) Phosphoglucose mutase
e) Aldolase
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