Biochemistry Question Seven - Which steps of glycolysis are not reversible for gluconeogenesis? How are these steps reversed during gluconeogenesis?
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Biochemistry Question Seven - Which steps of glycolysis are not reversible for gluconeogenesis? How are these steps reversed during gluconeogenesis?
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- Biochemistry Question Nine - Explain the major functions (pleural) of the pentose phosphate pathway (pentose shunt). (Don’t give the pathway)QUESTION: How are the following enzymes involved in the anabolism of fatty acids? (please include structure, function and reactions) Acetyl co A carboxylase, Malonyl acetyl transcyclase, Hydratase, ThioesteraseQUESTION 10 Which one of the following statements does NOT correctly describe the current state of the chymotrypsin-substrate complex below or the next mechanistic step that occurs? s,' G193 S195 NH NH R -NH R-NH HN- Ser-195 His-57 HN Asp-102 OA. This intermediate is part of a nucleophilic acyl substitution reaction. OB. In the next step His-57 protonates Ser-195. O C. In the next step His-57 activates a water molecule. O D. In the next step His-57 protonates the leaving group. OE. In the next step the N-terminal fragment of the original substrate departs.
- Question 6 What kinds of bonds do lipase break in order to release fatty acids from triacylglycerols? carbon-carbon double bonds O carbon-carbon single bonds O amide bonds estersQuestion 10 Which pathways are stimulated by glucagon? Select all that apply. glycogen metabolism tatty acid synthesis ketogenesis cholesterol synthesis glycogen synthesisQuestion 13 Which enzyme catalyzes the conversion of Triglycerides to glycerol and fatty acids? O Lipase Peroxidase Glycerol-3-phosphate oxidase Cholesteryl ester hydrolase
- Question:- Write two paragraphs that describe how phosphofructokinase-1 and fructose 1,6-bisphosphatase are regulated in a coordinated and reciprocal manner. The first paragraph should describe how the enzymes are regulated in response to energy needs in muscle cells. The second paragraph should describe how the hormones glucagon and insulin exert their effects via fructose 2,6-bisphosphate in liver cells.Question 7 Which of the following statements is CORRECT? The activity of the alpha(1,6)glucosidase produces a glucose-1-phosphate product. UDP-glucose pyrophosphorylase activated glucose-1-phosphate by producing UDP-glucose. Oa-Amylase digests glycogen by cleaving alpha(1,6) linkages to produce glucose- 6-phosphate and limit dextrins. Glycogen phosphatase removes the phosphate from glucose-1-phosphate to allow free glucose to be released into the blood. Question 8 Which of the following statements is CORRECT in response to epinephrine? There will be an increase in glycogen synthesis, gluconeogenesis, and amino acid metabolism with an increase in activity in the urea cycle. Protein phosphatase 1 will dephosphorylate acetyl-CoA synthetase resulting in increased production of mevalonate. The activation of phosphorylase kinase will activate glycogen synthase and inhibit the activity of glycogen phosphorylase. Protein kinase A activation will phosphorylate glycogen synthase to reduce its…Question 2 Which steps below require an ATP to run? O Phosphorylation Isomerization Second Phosphorylation Cleavage Conversion of DHAP into GADP Dephosphorylation Phosphate transfer Dehydration Second dehydration Question 3 Which steps are part of the energy investing half of glycolysis? Phosphorylation Isomerization Second Phosphorylation Cleavage Conversion of DHAP into GADP Dephosphorylation Phosphate transfer Dehydration Second dehydration
- Question 12 Which reaction in glycolysis consumes an inorganic phosphate (P₁)? O oxidation of glyceraldehyde 3-phosphate O isomerization of 1,3-biphosphoglycerate isomerization of glucose 6-phosphate O cleavage of glyceraldehydes 3-phosphate O phosphorylation of fructose 6-phosphate PrevQuestion: Fatty acid degradation (breakdown) and synthesis have many similarities but are uniquely different.Explain two ways that these pathways are similar and two ways that they differ. Please give four seperate factors in point form. Two similarities and two differences 4 overall.271