Multiple choice

The first important reaction in the process of respiration is_________.

  1. glycolysis

  2. photolysis

  3. krebs cycle

  4. fermentation

  5. break down of pyruvic acid into acetyl coenzyme A

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is the first step in the respiration process, from here the process depends upon the presence or absence of oxygen.