Question

Choose the correct answers from the alternatives given :
Which of these pairs of processes are anaerobic?

• A. Fermentation and glycolysis
• B. Fermentation and the Krebs cycle
• C. Glycolysis and the Krebs cycle
• D. The Krebs cycle and the electron transport system

Answer 1

The correct option is A Fermentation and glycolysis

Respiration is of two types -

Aerobic respiration - It is the process of complete oxidation of organic foods into carbon dioxide and water in the presence of oxygen. it has three steps ;

• Glycolysis - It occurs in the cytoplasm in which glucose breaks into two molecules of pyruvate. It occurs in both aerobic and anaerobic respiration.
• Krebs cycle occurs in the mitochondria where oxidative decarboxylation of pyruvate takes place to form acetyl CoA.
• Electron transport system - Here series of coenzymes and cytochromes acts as a passage of electron.

Anaerobic respiration - It is the process of incomplete oxidation of organic foods. oxygen is not utilized in this process, this occurs in the process of fermentation.

So, the correct option is ' Fermentation and glycolysis'.