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Answer:
The 2 carbon compound is called Acetyl CoA. Acetyl CoA now enters the citric acid cycle or the Krebs cycle.
Explanation: 2 molecules of pyruvic acid are the products of the enzymatic degradation of one molecule of glucose in a process known as glycolysis. Each molecule of Pyruvic acid (a 3 carbon molecule) is further degraded to a 2 carbon molecule called Acetyl CoA. Each molecule of Acetyl CoA then enters the citric acid cycle where it is used to produce 1 molecule of GTP, 3 molecules of NADH and 1 molecule of FADH2. NADH and FADH2 then enters the electron transport chain where they are used to generate ATP in a series of enzyme catalyzed reactions.
Comparing and contrasting a compound light microscope, basically both operate by bouncing tiny particles or waves off of objects in order to make them visible. Electrons are smaller than light photons so we can see smaller objects clearly with electron microscopes. There are disadvantages though. First, color is a function of light wave frequency so we can't see electron micrographs in color. Color can be added artificially though by computer to differentiate structures, (think photoshop). Also, we cannot see electrons so we make them visible by bouncing them off a cathode ray screen similar to a TV set or computer monitor