Question

3. True or False [ ] In glycolysis, a single glucose molecule breaks down into two molecules of pyruvate, which can then be broken down further to release ATP. Glycolysis itself releases four net molecules of ATP per molecule of glucose. [ ] The main products in glycolysis include ATP, pyruvate and NADPH. [ ] In the preparatory phase of glycolysis, ATP is invested to convert glucose to fructose 1,6-bisphosphate. The bond between C-2 and C-3 is then broken to yield two molecules of triose phosphate. [ ] Glycolysis is tightly regulated in coordination with other energy-yielding pathways to ensure a steady supply of ATP. [ Endogenous glycogen and starch, storage forms of glucose, enter glycolysis in a two-step process. Phosphorolytic cleavage of a glucose residue from an end of the polymer, forming glucose 1-phosphate, is catalyzed by glycogen phosphorylase or starch phosphorylase. Phosphoglucomutase then converts the glucose 1-phosphate to glucose 6- phosphate, which can enter glycolysis. [ Ingested polysaccharides and disaccharides are converted to monosaccharides by intestinal hydrolytic enzymes, and the monosaccharides then enter intestinal cells and are transported to the liver or other tissues. [ A variety of D-hexoses, including fructose, galactose, and mannose, can be funneled into glycolysis.

Answer 1

1. False

Glycolysis produces 2 net molecules of ATP. 4 molecules are synthesize in total and 2 are consumed.

2. False

The products are pyruvate, ATP and NADH.

3. True

4. True

Glycolysis is regulated by enzymes, phosphofructokinase and fructose 1,6 bisphosphatase.

Please rate high.

3.