What happens if oxygen is not present during glycolysis?

The body uses lysosomes to destroy pyruvate, and cellular respiration stops.
Pyruvate undergoes fermentation, and lactic acid is produced.
Pyruvate is turned back into glucose until oxygen becomes available again.
Pyruvate enters the Krebs cycle, which leads to the production of ATP molecules.

pyruvate undergoes fermentation, and lactic acid is produced.

Explanation:

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.