7. Why is the doorway step needed to link glycolysis and the Krebs Cycle?
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- 10. Glycolysis is a series of enzyme-catalyzed reactions that converts glucose molecules into pyruvate and yields a net of two molecules of adenosine triphosphate.Which molecule donates two phosphate groups to glucose to form fructose-1,6-bisphosphate in the early stage of glycolysis? Adenosine diphosphate (ADP) O Adenosine triphosphate (ATP) Glyceraldehyde-3-phosphate (G3P) Guanosine diphosphate (GDP)Classify the following enzymes: Oxidoreductase, Hydrolase, Transferase, Lyase, Ligase, Isomerase 1. Sucrase - 2. Trypsin - 3. Catalase - 4. Aspartate aminotransferase - 5. Cellulase - 6. Ptyalin - 7. Lactase - 8. Creatinine phosphokinase - 9. 5- alpha reductase - 10. Aminopeptidase -What are the three major pathways that eventually become entry points of molecules into the Krebs Cycle? Which molecules from these respective pathways are integrated into the Krebs Cycle? ( 1.
- create a single illustration that will interrelate or link the two opposing pathways, the Glycogenesis and Glycogenolysis. I want you to include the enzyme in each step and include some important by-products as well. From the illustration, I want you to encircle the intermediate molecule to highlight the link between the two processes. Aside from the illustration, I want you to compare and contrast the two pathways in terms of function, number of reaction steps, and usage of UTP. You can tabulate this part to make it simpler.1. What is the function of molecules like NAD+/NADH and FAD/FADH2 in cells? 2. Why is the Krebs cycle important in both catabolism and anabolism?a) Identify three differences between glycolysis and gluconeogenesis. b) Why should we avoid just seeing these processes of reversals of each other?
- Which pathway produces the most ATP molecules? lactic acid fermentation the Krebs cycle the electron transport chain glycolysis1. Which of the following statement is correct? a. Lipids can only participate in the TCA cycle. b. Amino acids can directly be used for the electron transport chain c. Carbohydrates, fatty acids, and amino acids can all be involved in the TCA cycle d. Carbohydrate is the only source of energy fit for glycolysis 2. What specific step do glucose-6-phosphate (G6P) go through in the liver but not in the muscle, during gluconegenesis? a. Isomerization of G6P to G1P b. Conversion of G6P to UDP-glucose c. Phosphorylation of G6P d. Dephosphorylation of G6P 3. Which of the following is first required when it comes to the oxidation of cis-monounsaturated fatty acids? a. 2,4-dienoyl isomerase b. Acyl-CoA mutase c. Enoyl-CoA isomerase d. 2,4-dienoyl CoA reductaseA7) Name the two enzymes that conduct substrate-level phosphorylation during glycolysis
- 15. For cells that are capable of aerobic cellular respiration and fermentation, such as yeast cells, one pathway may be favored over the other in certain circumstances. Which of the following accurately describes an advantage of the fermentation pathway, when compared to aerobic cellular respiration? a) Fermentation is less costly for the cell because it does not involve enzymes b) Fermentation generates a higher amoung of ATP per glucose substrate c) Fermentation is quicker because it does not involve glycolysis d)Fermentation can occur in the absence of oxygen (O2)1. Which of the following processes generates the most ATP? (Account for the no. of ATP) a. ) Citric Acid Cycle b.) Fatty Acid oxidation c.) Glycogenolysis d.) Glycolysis e.) Pentose phosphate pathway 2. What is the overall chemical changes that occur during one complete turn of the Krebs cycle? 3. Does the mitochondrial matrix ever run out of protons for pumping in oxidative phosphorylation?1. A metabolic pathway proceeds according to the scheme, R → S →T→U→ V→ W. A regulatory enzyme, X, catalyzes the first reaction in the pathway. Which of the following is most likely correct for this pathway? A) Either metabolite U or V is likely to be a positive modulator, increasing the activity of X. B) The first product S, is probably the primary negative modulator of X, leading to feedback inhibition. C) The last product, W, is likely to be a negative modulator of X, leading to feedback inhibition. D) The last product, W, is likely to be a positive modulator, increasing the activity of Х. E) The last reaction will be catalyzed by a second regulatory enzyme.