Question
Which stage of cellular respiration is an anaerobic process? A. the Krebs cycle B. electron transport C. glycolysis D. the Calvin cycle
Answer
4.3
(293 Votes)
Elspeth
Elite · Tutor for 8 years
Answer
C
Explanation
Cellular respiration is a process cells use to generate energy. It consists of several stages, each with its own unique function and characteristics. The question asks which stage of cellular respiration is anaerobic, meaning it does not require oxygen.1. The Krebs cycle (also known as the citric acid cycle): This process takes place in the mitochondria and requires oxygen. It is therefore an aerobic process.2. Electron transport: This is the final stage of aerobic respiration, occurring in the inner mitochondrial membrane. It also requires oxygen to function, classifying it as an aerobic process.3. Glycolysis: This is the first step in cellular respiration and takes place in the cytoplasm of the cell. It does not require oxygen and can occur in both aerobic and anaerobic conditions. During glycolysis, glucose is broken down into pyruvate, generating small amounts of energy (ATP). This process is anaerobic.4. The Calvin cycle: This is part of photosynthesis, not cellular respiration. It occurs in the chloroplasts of plants and is not relevant to the question of anaerobic processes in cellular respiration.Based on these descriptions, glycolysis is the only stage among the options given that is an anaerobic process.