Quiz 5

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Apr 3, 2024

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Question 1 (2 points) Saved Listen Which of the following statements is true concerning ketogenesis? Question 1 options: Ketoacidosis is caused by high blood pH due to high ketogenesis activity producing more ketone bodies than can be used by the body. Acetyl-CoA and β-hydroxymyristate are known as ketone bodies. Ketogenesis is inhibited when carbohydrate sources are limited due to starvation. The brain is unable to use ketone bodies as fuel. Ketogenesis is stimulated in times of starvation to utilize stored fatty acids. Question 2 (2 points) Saved Listen What are examples of the three major types of membrane lipids? Question 2 options: sphingomyelin, phosphatidylcholine, phosphatidylserine cholesterol, cerebrosides, phosphatidylserine cerebrosides, gangliosides, cholesterol phosphatidylinositol, gangliosides, sphingomyelin Question 3 (2 points) Saved
Listen Which enzyme catalyzes the modification of a fatty acid, so that it can be transported into the mitochondria for oxidation? Question 3 options: fatty acyl-CoA synthetase acetyl-CoA carboxylase acyl-CoA dehydrogenase carnitine acyltransferase I Question 4 (2 points) Saved Listen How many moles of acetyl-CoA are delivered to cells for each mole of beta-hydroxybutyrate generated in the ketogenic pathway? Question 4 options: 4 2 1 3 Question 5 (2 points) Saved Listen What is responsible for the side effect of bleeding ulcers from chronic overuse of ibuprofen? Question 5 options: Increased HCl production as a result of COX-2 activation in the stomach.
Decreased fever and increased COX-2 production due to ibuprofen activation. Decreased inflammation in the stomach due to COX-1 inhibition. Decreased mucin production as a result of COX-1 inhibition in the stomach. Question 1 (2 points) Saved Listen What is the primary difference in the oxidation of stearic acid (18:0) and oleic acid (18:1)? Question 1 options: Stearic acid requires one more pass through the fatty acid oxidation pathway. Oleic acid cannot be fully metabolized. Stearic acid yields less ATP. Oleic acid will yield one less FADH 2  product molecule. Question 2 (2 points) Saved Listen Fatty acid oxidation of palmitate yields 7 NADH, 7 FADH2, and 8 acetyl-CoA. What is the correct order for the chemical reactions required for each round of the beta-oxidation pathway? Question 2 options: oxidation, hydration, oxidation, thiolysis hydration, reduction, oxidation, thiolysis thiolysis, hydration, oxidation, hydration reduction, condensation, reduction, hydration Question 3 (2 points) Saved Listen
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How many moles of FADH 2 and NADH are generated from each pass through the -oxidation pathway? Question 3 options: 1 FADH 2 ; 0 NADH 1 FADH 2 ; 1 NADH 1 FADH 2 ; 2 NADH 0 FADH 2 ; 2 NADH Question 4 (2 points) Saved Listen Which type of phospholipid provides the fatty acid for lecithin-cholesterol acyltransferase to produce cholesterol esters? Question 4 options: Phosphatidylethanolamine Phosphatidylcholine Phosphatidylserine Phosphatidylinositol Question 5 (2 points) Saved Listen Cholesterol is the precursor to ________ and _______. Question 5 options: fatty acids and glycogen steroids and progesterone glycocholate and progesterone bile acids and glycocholate
Question 1 2 / 2 points Why is less ATP obtained from the average carbon in a sugar molecule than from a carbon in a fat molecule? Question options: The sugar carbons yield more NADH than ATP. The sugar carbons are derived from CO 2 . The sugar carbons require more water weight during cellular storage. The carbons in fatty acids are a more reduced form of carbon than those in sugars. Question 2 2 / 2 points Match the class of lipid with specific membrane lipids. If the name of lipid does not match a class of lipid then use "neither" as your answer. __1 __ Phosphatidylserine __2 __ Cerebroside __3 __ Phosphatidylcortisone __3 __ Glucocorticoid __1 __ Phosphatidylethanolamine __1 __ Phosphatidylinositol __3 __ Sphingomyelineoleate __2 __ Sphingomyelin __2 __ Ganglioside __3 __ Cholesterol 1 . Glycerophospholipid 2 . Sphingolipid 3 . Neither glycerophospholipid or sphingolipid Question 3 2 / 2 points Which of the following is a product from fatty acid oxidation of palmitate? Question options: 7 FAD 32 ATP
7 Acetyl-CoA 7 NADH Question 4 2 / 2 points Ketoacidosis is a condition caused by _______ blood pH, which can occur when ketogenesis produces more ________ and _______ than can be used by the tissues. Question options: high, acetoacetate, beta-hydroxycholate low, acetoacetate, beta-hydroxybutyrate high, acetoacetate, beta-hydroxybutyrate low, acetyl-CoA, beta-hydroxybutyrate Question 5 2 / 2 points Put the steps listed below into the correct order to explain how dietary fats are absorbed. __3 __ Intracellular synthesis of triacylglycerols __2 __ Lipase cleavage __4 __ Chylomicron assembly __5 __ Export of lipoprotein particle __1 __ Emulsification of fats __6 __ Entry into the circulatory system
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