Question

How many atp molecules are added to get glycolysis started

Answer 1

Two ATP molecules are added to get glycolysis started, which provides the necessary energy to split the glucose molecule into two three-carbon molecules, leading to a net gain of two ATP molecules by the end of the pathway.

Step-by-step explanation:

To initiate glycolysis, a total of two ATP molecules are utilized to phosphorylate glucose, which is the process of adding phosphate groups to glucose to make it more reactive. This initial investment of ATP provides the energy needed to start the breakdown of glucose into two three-carbon molecules. Glycolysis can be summarized in two phases: the energy-investment phase and the energy-payoff phase. In the energy-payoff phase, four ATP molecules are produced, resulting in a net gain of two ATP molecules by the end of the glycolytic pathway.

Answer 2

2 ATP

Step-by-step explanation:

2 ATP is required to get the glycolysis started. The glycolysis process is divided into two parts, the first part is called the preparatory phase in which energy is required and the second part is called the payoff phase in which energy is produced.

During the first phase in the first step during the conversion of glucose to glucose six phosphate one ATP is consumed and in the third step during the conversion of fructose 6 phosphate to fructose 1,6 biphosphate one more ATP is consumed and in the second phase, 4 ATP is produced.

Therefore the net gain is 2 ATP because 2 ATP are added to get glycolysis started.