Figure 9.2 The citric acid cycle.
-Carbon skeletons for amino acid biosynthesis are supplied by intermediates of the citric acid cycle. Which intermediate would supply the carbon skeleton for synthesis of a five-carbon amino acid (see Figure 9.2)?
A) succinate
B) malate
C) citrate
D) α-ketoglutarate
E) isocitrate

Question

Figure 9.2 The citric acid cycle.
-Carbon skeletons for amino acid biosynthesis are supplied by intermediates of the citric acid cycle. Which intermediate would supply the carbon skeleton for synthesis of a five-carbon amino acid (see Figure 9.2)?
A) succinate 
B) malate 
C) citrate 
D) α-ketoglutarate 
E) isocitrate

Quizplus · Accepted Answer

α-ketoglutarate is the intermediate that would supply the carbon skeleton for a five-carbon amino acid due to its five-carbon structure.

Figure 9.2 the Citric Acid Cycle