What is the end product of glycolysis?

1. NADH	2. ATP
3. G3P	4. Pyruvate

The outputs of the Krebs cycle do not include:

Oxidation of organic compounds by molecular oxygen results in the production of carbon dioxide and water and releases free energy. This is because:

In the given reaction:
${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\to 6{\mathrm{CO}}_2+6{\mathrm{H}}_2\mathrm{O}+\mathrm{Energy}$
1. ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$ is oxidized and ${\mathrm{O}}_2$ is reduced.
2. ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$ is reduced and ${\mathrm{O}}_2$ is oxidized.
3. ${\mathrm{CO}}_2$ is reduced and ${\mathrm{O}}_2$ is oxidized.
4. ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$ is reduced and ${\mathrm{CO}}_2$ is oxidized.

The products of fermentation do not include:

Oxidative decarboxylation of pyruvate produces:

The stage of cellular respiration that directly involves oxygen is:

When an electron is shifted to a more electronegative atom, its potential energy:

Consider the steps of glycolysis given in the diagram:  

What is true about reaction 1?
I. Hexokinase is a transferase
II. It acts to keep the glucose concentration low
III. It blocks the glucose from leaking out
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III