Question

What happens to the oxygen atoms in the oxygen gas (O2) that you INHALE? Select one:...

What happens to the oxygen atoms in the oxygen gas (O2) that you INHALE?

Select one:

A. Some become part of water molecules.

B. Some become part of glucose

C. Some become part of carbon dioxide molecules.

D. both A and B

E. both B and C

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Homework Answers

Answer #1

The correct answer is A. Some become part of water molecules.

This is the reaction that occurs during metabolism.

C6H12O6 + 6O2 → 6CO2 + 6H2O

Oxygen is used during the oxidative phosphorylation in mitochondria. Here the oxygen acts as the electron acceptor at end of ETC. This after ETC end, the electron are tranferred to oxygen which spilts and combined with H+ to produce water.

Glucose combined with oxygen to carry out metabolism. Oxygen is not used to synthesise glucose.

Carbon dioxide is produced from the glucose molecules in metabolic activities and not from oxygen.

Thus rest of the option are all wrong.

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