Question

Last answer choice means none of the above

Which of the regulated steps in glycolysis are not regulated by ATP levels? Hexokinase Phosphofructokinase Pyruvate kinase a and b a and c band

Answer 1

answer : - last choice means none of the above

CH,OH H H H но OH H HO,PO- O= I-U-I C-HDihydroxyacetone phosphate н H Glucose OH H HO OH 1 Hexokinase ATP CH2-OPO, н OH ADP H H Glucose 6-phosphate OH H HO OH 2 Phosphoglucose H OH isomerase CH2-OPO, CH,OH Fructose 6-phosphate HHO H OH 3 Phosphofructo ATP kinase-1 OH H ADP CH2-OPO,2- CH, -OPO,2- Fructose 1,6-bisphosphate HHO Aldolase 11 OH Triose Он н phosphate Glyceraldehyde O H isomerase 3-phosphate HC- CC-H (2 molecules ) HO OPO, Glyceraldehyde 2 NAD+ + 2P, 6 3-phosphate 2 NADH + 2H dehydrogenase O H 1,3-Bisphosphoglycerate (2 molecules) O,PO- C-H 1 Phosphoglycerate 7 HO 2 ADP kinase 2 ATP 3-Phosphoglycerate C-H (2 molecules) 1 HO Phosphoglycero- 8 OPO, 2- mutase 2-Phosphoglycerate 0-0 C-H (2 molecules) -0, pó OH 9 Enolase 2 H2O Phosphoenolpyruvate 0-C C=C-H (2 molecules) 10 Pyruvate 2 ADP kinase 2 ATP o o H Pyruvate 0-0 C-H (2 molecules) H 1 C OPO, 2- 0 H H 0- H H 0 H 2-0,PO H

from above image we can see hexokinase and phosphofructo kinase are those step in which ATP get used and in pyruvate kinase step ATP formtion occured. so these three are ATP regulated step.