alleryStart learning →What is the job of the first half of the glycolysis pathway?
ATo prepare the sugar for an even split
BTo release carbon dioxide from the sugar
CTo move the sugar into the mitochondrion
DTo harvest electrons onto electron carriers
Answer & Solution
Correct answer: A. To prepare the sugar for an even split
1. Glycolysis has two distinct phases with opposite roles.
2. The first part traps the glucose molecule in the cell and modifies it using energy.
3. That modification lets the six-carbon sugar be split evenly into two three-carbon molecules.
4. Harvesting electrons onto carriers belongs to the second half, not the first.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.2 Glycolysis_
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