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The Lipid Ledger: β-Oxidation vs Fatty-Acid Synthesis, Ketone Bodies, and Membrane Fluidity we use a Lego analogy to help understand
MCAT In The Car · 6 сентября 2026 г. · 12 мин
This study guide deconstructs lipid biochemistry by examining the reciprocal regulation of catabolic (kat-uh-BAH-lik: breakdown) and anabolic (an-uh-BAH-lik: building) acyl (AY-sil) pathways, centering on the carnitine (KAR-nih-teen) shuttle and allosteric (al-oh-STEER-ik: enzyme-regulating) control via malonyl-CoA (MAL-uh-nil koh-AY). We clarify the compartmental and enzymatic divide governing hepatic (heh-PAT-ik: liver) ketogenesis (kee-toh-JEN-eh-sis) versus peripheral ketolysis (kee-TAH-lih-sis), trace critical branch points in cholesterol and steroidogenesis (stair-oy-doh-JEN-eh-sis), and detail how acyl chain saturation dictates cellular membrane thermodynamics.