Question

what stage of cellular respiration can occur in human cells with or without oxygen present? multiple choice the citric acid cycle glycolysis the electron transport chain pyruvate oxidation

Explanation:

Glycolysis is the first - stage of cellular respiration that can occur in the absence or presence of oxygen in human cells. The other processes like the citric acid cycle, electron - transport chain, and pyruvate oxidation require oxygen to proceed.

Answer:

B. Glycolysis