Lipid Metabolism Quiz
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Which ketone body is produced first in the process of ketogenesis?
A. Acetoacetate
B. β-hydroxybutyrate
C. Acetone
D. Oxaloacetate
Acetyl-CoA are the precursors/ used for these Except
A. Ketogenesis
B. Fatty acid degradation
C. Fatty Acid Synthesis
D. Kreb Cycle
What are ketone bodies usually synthesized from?
A. Acetyl-CoA
B. Pre-B cell
C. Methionine
D. Pyruvate
Which of the following is the rate-limiting step of fatty acid oxidation and is also inhibited by malonyl CoA?
A. Thiokinase
B. Carnitine Palmitoyl transferase I
C. Acyl CoA Dehydrogenase
D. Thiolase
What is the main function of adipose tissue?
A. Storage location for energy
B. Insulation
C. Protection against physical shock
D. All of the above
What is the purpose of the shuttle mechanism in fatty acid transport into the mitochondrial matrix?
A. To convert fatty acids into acetyl CoA
B. To convert acyl CoA into acetyl CoA
C. To convert acetyl CoA into acyl CoA
D. To convert acyl CoA into ketone bodies
What is the primary source of stored energy in the human body?
A. Protein reserves
B. Glycogen reserves
C. Glucose reserves
D. Triacylglycerol reserves
What is the function of micelles in lipid digestion and absorption?
A. To transport fatty acids and monoacylglycerols across the intestinal cell membranes
B. To emulsify triacylglycerol globules
C. To convert triacylglycerols into chylomicrons
D. To hydrolyze ester linkages in triacylglycerols
Which ketone body is produced first in the process of ketogenesis?
A. Acetoacetate
B. β-hydroxybutyrate
C. Acetone
D. Oxaloacetate
How many ATP molecules are produced from the oxidation of stearic acid, an 18-carbon fatty acid?
A. 120 ATP
B. 122 ATP
C. 124 ATP
D. 126 ATP
Approximately how many molecules of ATP can be produced from the oxidation of a 20 carbon fatty acid, including those produced in the Krebs cycle?
A. 107
B. 100
C. 129
D. 136
What is the fate of fatty acid entering the cells?
A. Fatty acid diffuses into mitochondria for beta-oxidation
B. Fatty acid is converted into fatty acyl CoA (activated form)
C. Fatty acid is bound to albumin in the cytosol
D. None of the above
What is the primary site for ketogenesis?
A. Liver mitochondria
B. Adipose tissue
C. Muscle cells
D. Pancreas
What is the major enzyme involved in the hydrolysis of triacylglycerols in the small intestine?
A. Gastric lipase
B. Pancreatic lipases
C. Hormone-sensitive lipase
D. Lipoprotein lipase
Which of the following is NOT a ketone body?
A. Acetoacetate
B. β-hydroxybutyrate
C. Acetone
D. Glycerol