If Glucose Labeled with ¹⁴C in C-1 Were Fed to Yeast

Multiple Choice

If glucose labeled with ¹⁴C in C-1 were fed to yeast carrying out the ethanol fermentation, where would the ¹⁴C label be in the products?

A) in C-1 of ethanol and CO₂
B) in C-1 of ethanol only
C) in C-2 (methyl group) of ethanol only
D) in C-2 of ethanol and CO₂
E) in CO₂ only