4. Metabolism
Lipid Metabolism — Quiz
Test your understanding of lipid metabolism with 5 practice questions.
Practice Questions
Question 1
Calculate the net ATP yield from complete β-oxidation of one stearoyl-CoA (C18:0) molecule in mitochondria, assuming each NADH yields 2.5 ATP, each FADH₂ yields 1.5 ATP, each acetyl-CoA oxidation yields 1 GTP (≈1 ATP), and 2 ATP are consumed in activation.
Question 2
How many distinct catalytic activities (domains) does the mammalian fatty acid synthase (FAS) complex possess?
Question 3
In eukaryotic cells, the elongation of long-chain fatty acids beyond 16 carbons occurs in which cellular organelle?
Question 4
Which mechanism best describes how glucagon acutely inhibits hepatic fatty acid synthesis?
Question 5
Proprotein convertase subtilisin/kexin type 9 (PCSK9) regulates plasma LDL-cholesterol levels by which mechanism?