Question

Catabolism of Glucose. In the following paragraphs, write in the term that fits best. One of the most thoroughly studied aspects of metabolism is the catabolism of glucose. The process involves many chemical steps and three metabolic The first of these is called . In this pathway, one 6-carbon glucose molecule is converted into two 3-carbon molecules of the early steps of this metabolic pathway, two molecules of must be supplied for energy. Later on, however, a total of ATP molecules is produced, for a net gain of two ATPs per glucose. The other important product of this pathway is And (no. of) molecules of this product are produced from each glucose metabolized in the pathway Before The second metabolic pathway is the entering this pathway, the pyruvate formed from glycolysis undergoes a change. It loses a carbon molecule as and the remaining two carbons combine with Now the carbon atoms enter the Krebs cycle coenzyme A to form for metabolism. The first compound formed is a 6-carbon molecule called Then, a number of other intermediates forma and eventually a 4-carbon molecule After two results. The two carbons that entered the cycle now exist as turns of the Krebs cycle (for 2 pyruvate molecules) a total of six molecules of carbon dioxide will have NADH formed from the carbons in glucose. Importantly, in these reactions a total of _FADH, was produced. In addition, ATP molecules were generated. and

Answer 1

The process involves many chemical steps and 3 metabolic pathway glycolysis, the citric acid cycle, and oxidative phosphorylation. The first of these is called Glycolysis, In this pathway one 6 - carbon glucose molecule is converted to 3 - carbon molecule of Pyruvate. in the early steps of this metabolic pathway two molecules of ATP must be supplied for energy later on , however a total of 4 ATP molecules is produced, for a net gain of 2 ATP per glucose. The other important product of this pathway is NADH + H⁺ and 2 molecules of this product are produced from each glucose metabolized in the pathway.

The second metabolic pathway is citric acid cycle or krebs cycle. Before entering in this pathway, the pyruvate formed from glycolysis undergoes a change. It loses a carbon molecule as CO₂ and the remaining two carbons combine with coenzyme A to form acetylcoenzyme A. Now the carbon atom enters the kreb cycle for metabolism. The first compound formed is a 6-carbon molecule called citrate. Then the number of other intermediate forms and eventually a 4 - carbon molecule results. The two carbon that entered the cycle now exists as Oxaloacetate. After 2 turn of krebs cycle (for 2 pyruvate molecule) a total of six molecules of carbon dioxide will have formed from the carbon in glucose. importantly in these reaction a total of 6 NAD and 4 FADH₂ was produced. in addition 2 ATP molecules were generated