Animal cells can carry out gluconeogenesis from three- and four-carbon precursors, but not from the two acetyl carbons of acetyl-CoA.

In the boat conformation of cyclohexane, the "flagpole" hydrogens are located on ________. () A: the same carbon B: adjacent carbons C: C-1 and C-3 D: C-1 and C-4 E: none of the above

Pyridoxal phosphate (PLP) participates in a variety of reactions at the α, β, and γ carbons (C-2 to C-4) of amino acids. Reactions at the α carbon include ___________________. A: acemization (interconverting L- and D-amino acids) B: decarboxylation C: transamination D: deamination

Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.