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CHEM 120 FINAL EXAM QUESTIONS AND ANSWERS COMPLETE RATED A.
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CHEM 120 FINAL EXAM QUESTIONS AND ANSWERS COMPLETE RATED A.
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CHEM 120 FINAL EXAM QUESTIONS ANDANSWERS COMPLETE RATED A.
1. What is the primary function of bile salts in fatty acid metabolism?
Correct Answer -c) To break down and emulsify large fat globules to make
them more readily hydrolyzable by lipases
2. What is the major storage form of fatty acids in the body?
a) Glycogen
Correct Answer -b) Triglycerides
3.The structure below represents a fatty acyl CoA molecule. Which of the
following statements concerning this compound is TRUE?
Correct Answer -a) The wavy line indicates a high-energy thioester bond
4.Which statement(s)concerning the complete metabolism of arachidic
acidic(are)TRUE?
Correct Answer -Answers(a), (c), and (d) are correct
5.The ketone bodies: β-hydroxybutyrate, acetone, and acetoacetate are
shown below. Which ketone body (or ketone bodies) can be detected in the
urine of a diabetic individual?
Correct Answer -a) Acetone
6. Ketone bodies are formed when
Correct Answer -b) Fat metabolism exceeds sugar metabolism
,. The order that theenergy stores are used in ourbody in a time of
starvation is:
Correct Answer -e) Glycogen, fats, proteins
8. Which pyrimidine bases are found in DNA?
Correct Answer -d) Cytosine and thymine
.Base pairing between guanine and cytosine is more stable than base
pairing between adenine and thymine. Which of the following best
explains why?
Correct Answer -b)G-C base pairing involves three hydrogen bonds, while
A-T base pairing involves only two hydrogen bonds
Which of the following is a structural and functional component of the
ribosome?
Correct Answer -c)rRNA
. The structure of ribose, found in RNA, is shown below. How does the
structure of deoxyribose, found in DNA, compare to it?
Correct Answer -a) Deoxyribose has one less oxygen
What directional flow of information is referred to as the "central dogma of
the cell"?
Correct Answer -12. What directional flow of information is referred to as
the "central dogma of the cell"?a) DNA → RNA → protein
13. Pancreatic lipase is an enzyme that catalyzesthe hydrolysis of a
triglycerideto one monoglyceride and two fatty acids.
Correct Answer -a) True
, . Twelve ATP molecules are made for each acetyl CoA in-oxidation.
Correct Answer -true
15.Foreverycycle of β-oxidation, the carbon chain of a fatty acid is
shortened by twocarbon atoms.
Correct Answer -true
16. The brain is an exampleof an organthat can use fatty acids as a source
of energy.
Correct Answer -false
The heart muscle prefers ketone bodies over glucose as its energy source.
Correct Answer -true
18. The two strands of a DNAmoleculeare complementary to each other
and also run parallel to each other.
Correct Answer -b) False
1.Fill in the blanks using words from the word bank given below:
(3pts)Note: Each word may be used once, more than once, or not used at
all.
Correct Answer -a)Two main hormones are involved in the regulation of
cellular metabolism in the body:___glucagon_______is thehormone that
stimulates the breakdown of fatsand inhibits glycogen synthesis. On the
other hand,___insulin________is thehormonethatstimulates the synthesis
of triglycerides and synthesis of glycogen.b) Theprocess ofsynthesisof
ketone bodies is called______ketogenesis___________.c) Adrop in the pH
of the blood caused by high concentrations of ketone bodies lead to a
medical state known as ________ketoacidosis____________.d) In
reference to the structureof nucleotides, _______purines______________is
a class of nitrogen-containingbases that have double-ring structures.e) The
source of energyfor a workingmuscle isderived from_____glycogen______
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