Chapter 7 Review
1) The molecule made during glycolysis that is used later in steps of fermentation is pyruvic acid.
2) The molecule made during the later steps in fermentation that is used in glycolysis is NAD+.
3) The molecules that the Krebs cycle makes that the electron transport chain uses are pyruvates.
4) The molecule that will determine whether pyruvic acid will undergo fermentation or be converted for entry into Krebs cycle is oxygen.
5) Oxygen will determine whether pyruvic acid will undergo lactic acid fermentation or alcoholic fermentation.
16) The events that occur from the end of glycolysis through the first reaction of the Krebs cycle is that first pyruvic acid enters the mitochondria by removing carbon and two oxygen. Later when the carbon dioxide is removed, energy is released and NAD+ is converted into NADH. Coenzyme A then attaches to the remaining acetyl forming acetyl CO.
17) Most eukaryotic cells produce fewer than 38 ATP molecules for every glucose molecule that is oxidized by aerobic respiration is because the NADH that is made in the cytosol during glycolysis cannot diffuse through the inner membrane of the mitochondrion, it must be transported into the mitochondrial matrix. So as a result the active transport of NADH consumes ATP releasing only 36 ATP molecules.
18) Anaerobic pathway differs from the pathways of aerobic respiration at the sites they occur in eukaryotic cells by the presence of oxygen. In anaerobic pathways the oxygen is absent and no additional ATP is yield and aerobic respiration when the oxygen is present and it produces larger amount of ATP.
19) When you exercise too strenuously your muscles become fatigued and sometimes develop cramps it’s because of the increased acidity reducing the capacity of the cells to contract....
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