Question

Which of the following describes the process of glycolysis? See Concept 9.2 (Page 170) View Available Hint(s) Which of the following describes the process of glycolysis? See Concept 9.2 (Page 170) Glycolysis produces 30 ATP from each molecule of glucose. It converts one glucose molecule to two molecules of pyruvate and carbon dioxide. Glycolysis occurs in the mitochondria. It represents the first stage in the chemical oxidation of glucose by a cell. It requires ATP and NADH.

Answer 1

Glycolysis is the metabolic process that converts glucose into pyruvate, producing a net gain of two ATP and two NADH molecules, occurring in the cytoplasm either with or without oxygen.

Step-by-step explanation:

The process of glycolysis describes the conversion of one molecule of glucose into two molecules of pyruvate. This metabolic pathway occurs in the cytoplasm and can function with or without oxygen. During glycolysis, glucose is phosphorylated and split into two three-carbon sugars, which are then oxidized and converted into pyruvate. ATP and NADH are produced in the process.

Initially, two ATP molecules are used, but four are produced, leading to a net gain of two ATP molecules for the cell. Similarly, two NADH molecules are produced, which can be used in further stages of cellular respiration to generate even more ATP. Glycolysis is critical for cells, especially those like mature mammalian red blood cells, which rely solely on this process for their energy needs.

Answer 2

It represents the first stage in the chemical oxidation of glucose by a cell.

Step-by-step explanation:

Glycolysis is the first stage of oxidation of glucose by the process of cellular respiration. Glycolysis includes the breakdown of one molecule of glucose into two molecules of pyruvate. Substrate level phosphorylation forms net 2 ATP molecules and the redox reactions of glycolysis uses NAD+ as an electron acceptor resulting in the formation of 2 NADH.

Therefore, one molecule of glucose obtains 2 pyruvate molecules, 2ATP and 2 NADH by glycolysis. The fate of pyruvate depends on the availability of oxygen. Citric acid cycle and oxidative phosphorylation are the next two stages of aerobic cellular respiration.