wgu c785 biochemistry all module 5 final exam questions and answers 20222023 latest updategraded a
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WGU C785 BIOCHEMISTRY ALL MODULE 5 FINAL EXAM
QUESTIONS AND ANSWERS 2022/2023 (LATEST
UPDATE)/GRADED A+
What vitamin does not travel through the bloodstream in the form of a lipid micelle? (correct
answers)Vitamin C
Which lipid has a 4-ring structure? (correct answers)Sterol
Which of the following situations is MOST likely to increase the rate of beta oxidation? (correct
answers)fasting
A patient who is on a no-fat diet is at particular risk of deficiency in: (correct answers)Vitamin A
During starvation, triglycerides can help supply some of the body's glucose needs. Which breakdown
product of triglycerides can be used to make glucose? (correct answers)glycerol
CH3(CH2)6CH=CH(CH2)2COOH (correct answers)liquid at the lowest temperature
Describe the steps involved in fatty acid synthesis (correct answers)Acetyl-CoA is transported to the
cytoplasm - Biotin transfers a carboxylate group to acetyl-CoA - the malonyl group is transferred to a
carrier protein - malonyl ACP combines with acetyl-CoA, - malonyl-CoA is added repeatedly to the
growing fatty acid
What fatty acid will produce 8 Acetyl CoA molecules after it is completely metabolized via beta
oxidation? (correct answers)CH3(CH2)4CH=CH(CH2)4CH=CH(CH2)8COOH
Which set of molecules are produced by the beta oxidation of fatty acids? (correct answers)Acetyl CoA,
NADH, FADH2
, Gastric bypass surgery results in an increase in the production of GLP-1, a peptide that promotes insulin
secretion. This is thought to be associated with the tendency for these patients' type II diabetes to
resolve after the surgery. If a gastric bypass patient has a mutation in GLP-1 that impairs its function,
what is to be expected? (correct answers)The patient would have reduced insulin secretion compared to
patients with normal GLP-1, and this reduction results in increased fatty acid oxidation
Through mandatory state testing, a 2-day-old newborn is found to have a medium chain acyl-COA
dehydrogenase deficiency (MCADD). This enzyme deficiency interferes with the baby's ability to break
down medium chain fatty acids via beta oxidation. Her parents need to be given specific instructions on
what the baby can ingest. What is correct? (correct answers)She will not be able to utilize adipose tissue
for ATP production as effectively as a baby without the disorder
Which of the following contributes to the development of ketoacidosis in a diabetic patient (correct
answers)A reduction in citric acid cycle intermediates, which decreases the amount of oxaloacetate that
acetyle-CoA can combine with to enter the citric acid cycle
What describes a fatty acid? (correct answers)C16H3202
Unsaturated fatty acids can have different arrangements of hydrogen atoms at the double bond
depending on whether the bonds are cis- or trans- configuration. A consequence of this : (correct
answers)fatty acids with cis-configuration double bonds do not pack together well which lowers their
melting point
What best describes fatty acid hydrogenation? (correct answers)Hydrogenation converts some
unsaturated fatty acids into saturated fatty acids
Phospholipids have parts that are hydrophobic (non-polar, not soluable in water) and a part that is
hydrophilic (polar; water-soluable). What term do we use to describe a molecule that is both polar and
non-polar? (correct answers)amphipathic
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