Multiple choice

In an animal cell, the first phase in the breakdown of glucose is

  1. fermentation

  2. ETS

  3. krebs cycle

  4. glycolysis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glycolysis is the first stage of cellular respiration in animal cells, occurring in the cytoplasm. It breaks down one glucose molecule into two pyruvate molecules, producing a net gain of 2 ATP and 2 NADH molecules. This anaerobic process precedes the Krebs cycle and electron transport system.

Keep practicing — related questions