(Q).
Q: What two gases are the main components of air? Choices: - oxygen and helium - carbon and oxygen - hydrogen and helium - nitrogen and oxygen A:
(A).
nitrogen and oxygen

(Q).
Q: When dissolved in water, the base sodium hydroxide (naoh) produces sodium ions with what charge? Choices: - constant - similar - negative - positive A:
(A).
positive

(Q).
Q: What is the final stage of aerobic respiration, when energy from the krebs cycle is transferred to atp? Choices: - glycolysis - acetyl-CoA - cytoplasm transport - electron transport A:
(A).
electron transport