revised glycolysis and link and krebs

Question 1

how does glucose enter the cell

Answer 1

it enter through facilliated diffusion through special glucose carrier protiens

Question 2

what happens to the glucose in the cytoplasm

Answer 2

it is phosphorylated by the hydrolysis of atp to reduce activation energy which then forms hexose biphopshate which splits into triose phosphate

Question 3

what happens to the triose sugar

Answer 3

it releases hydrogen which reduces nad to form nadh and donates phosphates to form atp overall forming a 3 carbon molecule pyruvate

Question 4

what happens when there is oxygen

Answer 4

pyruvate enters the mitochondrial matrix where it is converted into acetyl

Question 5

how is it converted into acetyl

Answer 5

pyruvate loses a carbon dioxide and one hydrogen which is taken up by nad to form nadh

Question 6

what happens to the acetyl

Answer 6

temporarily combine with the coenzyme a to form acetyl coenzyme a

Question 7

what happens to the acetyl coenzyme a

Answer 7

enters the krebs cycle and acetyl carbon compound react with 4 carbon compound releasing coenzyme a and form the 6 carbon compound citrate

Question 8

what happens to the citrate

Answer 8

This is dehydrogenated (hydrogen picked up by NAD) and decaroxylated to 5 carbon α ketoglutarate. This 5 carbon compound is dehyrgoenated (losing 3 hydrogen atoms, 2 are picked up by NAD and one is picked up by FAD) and decarboxylated (producing carbon dioxide)

Question 9

what is net produced for the kerb cycle for only one acetyl coenzyme a

Answer 9

1 atp
3 nadh
1 fadh