Question

________ is the common pathway for aerobic and anaerobic respiration.
A. Krebs' cycle
B. ETS
c. Calvin cycle
D. Glycolysis

Answer 1

Respiration is one of the most important chemical processes that all living organisms, including plants, animals, and humans, use to release energy for life processes. Both in the presence and absence of oxygen, the process of respiration takes place.

Complete answer:
Inhaling oxygen gas and exhaling carbon dioxide gas, for example, is the process of respiration in humans. Many other living organisms, such as plants and animals, use the process of respiration to obtain energy for their metabolic functions.
Aerobic and anaerobic respiration are the two types of respiration.
Aerobic Respiration: Aerobic Respiration is the process of cellular respiration that occurs in the presence of oxygen gas to generate energy from food. Most plants and animals, including birds, humans, and other mammals, use this type of respiration. The end products of this process are water and carbon dioxide.
Anaerobic Respiration: Anaerobic Respiration is a type of respiration that occurs in the absence of oxygen. The energy is obtained by breaking down glucose in the absence of oxygen in this process. The fermentation process in yeast is one of the best examples of anaerobic respiration.
Glycolysis is a process that occurs in both aerobic and anaerobic respiration. Glycolysis takes place in the cytoplasm and produces two molecules of pyruvic acid from one molecule of glucose. During glycolysis, no oxygen is consumed and no carbon dioxide is produced.
The Krebs cycle produces oxaloacetic acid as the final product. Water and ATP are the end products of the electron transport chain. Chemical energy from NADPH and ATP produced in the light reactions is used in the Calvin cycle reactions. Glucose is the Calvin cycle's final product.
Hence, The formation of pyruvate is required for both aerobic and anaerobic respiration.
Glycolysis is the process by which Pyruvate is formed from glucose.

As a result, Option D: Glycolysis is the correct answer.

Note: Glycolysis is the first step in cellular respiration, where glucose molecules are oxidized. The Krebs cycle and oxidative phosphorylation are then used to produce ATP. Glycolysis is the first of cellular respiration's main metabolic pathways to produce energy in the form of ATP.