Glucose Labeled with ¹⁴C in C-3 and C-4 Is Completely

question 100

Multiple Choice

Glucose labeled with ¹⁴C in C-3 and C-4 is completely converted to acetyl-CoA via glycolysis and the pyruvate dehydrogenase complex. What percentage of the acetyl-CoA molecules formed will be labeled with ¹⁴C, and in which position of the acetyl moiety will the ¹⁴C label be found?

• A) 100% of the acetyl-CoA will be labeled at C-1 (carboxyl).
• B) 100% of the acetyl-CoA will be labeled at C-2.
• C) 50% of the acetyl-CoA will be labeled, all at C-2 (methyl).
• D) No label will be found in the acetyl-CoA molecules.
• E) Not enough information is given to answer this question.

---

Definitions:

Older Persons

Individuals who are in the later stages of their life, typically those considered senior citizens or the elderly.

Suffer Abuse

To experience harm or mistreatment, often repeatedly, from someone in a position of power or trust.

Live Alone

The state or practice of residing in a dwelling by oneself, without the presence of any cohabitants.

Men

Adult human males, often discussed in the context of gender roles, expectations, and biological differences from females.