Respuesta :
Answer:
The conversion of glucose to glucose 6‑phosphate;
The formation of fructose 1,6‑bisphosphate from fructose 6‑phosphate;
The formation of pyruvate and ATP from phosphoenolpyruvate and ADP;
The formation of 3‑phosphoglycerate and ATP from 1,3‑bisphosphoglycerate and ADP
Explanation:
All the above mentioned reactions of glycolysis are irreversible. The reason why these are irreversible is because they are involved in either the phosphorylation of the target molecule or removal of the phosphate group from the target molecule. In rest of the reactions of glycolysis either isomerization or rearrangement of carbon atoms is occurring which does not require much energy so the reactions are reversible.
During phosphorylation, phosphate group forms a covalent bond (very strong bond) with the target molecule that is why it requires a lot of energy to break this bond so as to regenerate the reactants again making the reverse reaction impossible.
Reversible reactions on the other hand require weak bonding at the point of interaction so that it could be easier to regenerate the reactants from the product.
The cytoplasmic pathway that converts the glucose molecules into pyruvate is called glycolysis. The breakdown occurs to generate the energy needed for the functioning of cells.
The irreversible reactions of glycolysis under intracellular conditions:
- Option A. The conversion of glucose to glucose 6‑phosphate;
- Option C. The formation of fructose 1,6‑bisphosphate from fructose 6‑phosphate
- Option D. The formation of pyruvate and ATP from phosphoenolpyruvate and ADP
- Option E. The formation of 3‑phosphoglycerate and ATP from 1,3‑bisphosphoglycerate and ADP
This can be explained as:
- The above stated all reaction processes are irreversible as they include the phosphorylation or dephosphorylation of molecules.
- Option B is reversible as it includes rearrangement or isomer formation of carbon molecules.
- The irreversible reaction including phosphorylation and removal of phosphate includes heat for the formation and breaking of covalent bonds.
- The reversible reaction on other hand has weak bonds that can be reversed.
Therefore, some reactions are reversible while others are not.
To learn more about glycolysis follow the link:
https://brainly.com/question/10886602
