During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is ?

Question

A) transferred to ADP, forming ATP
B) transferred direclty to ATP
C) retained in the pyruvate
D) stored in the NADH produced
E) used to phosphorylate fructose to form fructose-6-phosphate

Answer 1

Glycolysis itself converts 2 ADPs to ATPs net, while the citric acid cycle (TCA) / electron transport chain converts about 30 ADPs, so the answer is clearly not A (or B: how exactly do you transfer energy to an already fully-charged ATP?)
For D: the TCA produces more NADH's than glycolysis, so it's unlikely to be D. As for E: F-6-P is an intermediate in glycolysis, and its phosphorylation only requires either 1 or 2 ATP (I forget), compared to about 30 ATPs at the end. So I believe the answer is C: so much more energy is stored in pyruvate to yield 30 ATPs later in the TCA and electron transport chain. Hope this helps.

Answer 2

Hmmm- I would say C
because:
A) only 2 molecules of ATP are formed by glycolysis
B) energy would be transferred to ADP, forming ATP
D) NADH is mostly produced in the Kreb's Cycle
E) nope

Answer 3

Well pyruvate retains more of the energy since the pyruvate moves on to the krebs cycle where more atp FADH2 and NADH is produced

Answer 4

It's retained in pyruvate.

Answer 5

she is right. c is correct.