<span>A.) high-energy 3-carbon molecules...
Like 3-Phosphoglyceric acid is a 3-carbon sugar which completes the cycle by converting itself into 6-carbon molecule.
Hope this helps!
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Its actually the Adrenal Gland. I took this test and entered "Pituitary Gland" and it showed up wrong. Should have stuck with my answer instead of listening to the internet. Take it from someone who took the test. The rest of my answers i got right, so if you need any comment down below. Good luck to any future testers!