Question

Please I need help with this Biology question?

Answer 1

A suspension of minced (ground up finely) rabbit muscle is supplied with a small amount of glucose in which all carbon atoms are radioactive C-14. In which compounds will the radioactivity be present after all the glucose has been metabolized anaerobically by fermentation in a the absence of oxygen? In which compounds will the C-14 be found after complete metabolism by aerobic respiration in the presence of oxygen?

Answer 2

Ah, fun question. Well you know that in anaerobic fermentation--lactic-acid fermentation in this case, since we're speaking of a rabbit--lactic acid and NAH+. So here those radioactive carbon isotopes would be found in the lactic acid--yikes.

Answer 3

In aerobic respiration though, the intermediates are eventually decarboxylated and carbon dioxide is produced, which is where the radioactive carbons would end up in this scenario. This would occur in the Kreb's or Citric Acid Cycle.

Answer 4

Thank you so much @KinzaN

Answer 5

You're welcome =)