Answer : A, B , C
Explanation: the second option
Answer:
"We breathe more quickly and deeply when we exercise. Because when we exercise, we hydrolyze more ATP to ADP and Pi, and O2 is necessary for the hydrolysis, so we increase our intake of oxygen. -Because when we exercise, we use more ATP, and additional O2 is necessary to generate sufficient ATP."
Protein is composed of amino acids. amino acids are the building blocks of protein