What is the starting molecule for the krebs cycle?

Answer 1

its actually Acetyl-coenzymeA

but since the acetyl-coA forms from Pyruvic acid becauz of da action of Pyruvic Dihydrogenase & NAD, in some books Pyruvic acid is referred as the starting material.

see:http://en.wikipedia.org/wiki/Krebs_cycle

Answer 2

Well First off Glucose are split down and creating 2 ATP if i remember. It is split into two Pyrate which consists of c 3

Answer 3

Since it is a cycle, I don't know what point you would call the "start".

There is a good Wikipedia article, with chart of the cycle.