Question

question 12 (1 point)
how does glucose change at the beginning of glycolysis?
it changes shape to fructose.
an atom of oxygen is removed.
a phosphate group is added.
an atom of oxygen is added.
question 13 (1 point)
what doesnt occur during glycolysis?
the division of a six - carbon molecule into two molecules, each with three carbon atoms
the transfer of electrons and protons to nad molecules
the synthesis of atp, which is later broken down to adp and p₁
reduction of fad

Explanation:

For Question 12: At the start of glycolysis, glucose is phosphorylated, meaning a phosphate group is added to it by the enzyme hexokinase.
For Question 13: During glycolysis, glucose (a six - carbon molecule) is split into two three - carbon molecules, electrons and protons are transferred to NAD+ to form NADH, and ATP is synthesized and later used. Reduction of FAD occurs in the citric acid cycle, not in glycolysis.

Answer:

Question 12: C. A phosphate group is added.
Question 13: D. Reduction of FAD