Metabolism Summary 3 2 glucose, fructose, galactose fatty acid, glycerol amino acids glycogenesis Nitrogen Pool 5 glycogenolysis gluconeo- genesis tissue glycolysis protein Fatty Acid Lactic Acid Spiral NH3 CO2 acetyl Co A 2H* ADP ADP ADP 02 10 urea 2e H20 ATP ATP ATP
13-2. The oxidation of sugar molecules (carbohydrates) by the cell occurs according to the following reaction:
C6H12O6 + 6O2 6CO2 + 6H2O + Energy
Glucose
Which or which of the following statements are true or false? Justify the false ones.
A. All the energy produced by the cell is in the form of heat.
B. None of the energy the cell produces is in the form of heat.
C. Cellular energy is produced by a process that involves the oxidation of carbon atoms.
D. The reaction supplies the cell with the essential nutrient water.
E. In cells the reaction given above takes place in more than one stage.
F. Many of the stages in carbohydrate oxidation involve reaction with oxygen gas.
G. Some organisms carry out the reaction (above) in reverse.
H. Some cells that grow in the absence of O2 produce CO2.
13.3 A highly sensitive instrument (which has not yet been invented) detects that one of the carbon atoms exhaled in Darwin's last breath when he died now resides in his blood where it is part of a hemoglobin molecule. Suggest how this carbon atom could get from Darwin to you and mention some of the molecules that may have been involved in that path.
13.4 Draw, not COPY / PASTE, the ten glycolysis reactions and the Krebs cycle reactions. It is a good way to understand how all this works.
13.5 Pair the numbers in the figure with the terms given.
13.5 Pair the numbers in the figure with the terms given.
A. Urea Cycle F. Electron Transport Chain
B. Proteins G. Cycle of Tricarboxylic Acids
C. Fats and Lipids H. Glycogen
D. Carbohydrates I. Pyruvic acid
E. Lipogenesis J. Glucose-6-PO4
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