What are 2 benefits using phosphorylation to activate an enzyme?
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What are the advantages to regulating enzyme activity through phosphorylation? How does it differ from allosteric regulation and how is it similar? Are there any advantages to phosphorylation versus allosteric regulation of protein function?
Which of the following conditions will activate PDH kinase, which catalyzes the phosphorylation and inactivation of E1 in the PDH complex: a. elevation concentrations of acetyl coa b. elevated concentrations of NAD+ & ADP c. CA2+ d. insulin e. none of the above
Hormonal activation of insulin levels will: o activate protein kinase A phosphorylation of FBPase2. O phosphorylate PFK2 on a tyrosine residue. O lead to the activation of PFK. O activate the PKC phosphorylation of PFK2. O increase the activation of glucolysis. How many electrons does one turn of the TCA cycle produce? O 3 06 08 O 10 O None of answers are correct Which of the following statements is correct about oxidative pentose phosphate pathway? o It generates NADH...
QUESTION 4 Liver pyruvate kinase and the bifunctional regulatory enzyme PFK2/FPBase2 are targets of phosphorylation/dephos phorylation. Indicate their phosphorylation states and activities when glucose is scarce (glucagon-stimulated). The PFK2/FPBase2 enzyme is a single polypeptide, so the phosphorylation state of each should be the same. Phosphorylation state Activity FBPase2 L PEK2 PFK2 ] Pyruvate kinase Decreased Increased No change
Q) Indicate if the following molecule will activate or inactivate the given enzyme or pathway (A) A high amount of citrate for fatty acid synthesis: (B) Glucagon for acetyl-CoA carboxylase (C) Insulin for triacylglycerol lipase
[Biochemistry] Compare phosphorylation and proteolysis as mechanism for activating an enzyme. Explain why a lipid hormone have intracellular receptors.
Question 30 (1 point) The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. What reaction does it catalyze? the phosphorylation of fructose 6- phosphate. the substrate-level phosphorylation reaction whereby phosphoenolpyruvate is converted to pyruvate the isomerization of glucose 6-phosphate to fructose 6-phosphate. the first of the 10 reactions of glycolysis.
Describe how to activate (turn on) the GFP gene as well as the lac operon. What are the functions of restriction enzyme?
Question 30 (1 point) The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. What reaction does it catalyze? o the phosphorylation of fructose 6-phosphate the substrate-level phosphorylation reaction whereby phosphoenolpyruvate is converted to pyruvate 0 the isomerization of glucose 6-phosphate to fructose 6-phosphate. 0 the first of the 10 reactions of glycolysis. 0
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a succinate dehydrogenase b. a-ketoglutarate dehydrogenase c. succinyl thiokinase d. isocitrate dehydrogenase e. aconitase 2. Which of the listed enzymes of the TCA cycle does not represent a regulatory enzyme?: a. isocitrate dehydrogenase b. succinate dehydrogenase c. malate dehydrogenase d. a-ketoglutarate dehydrogenase complex e. citrate synthase 3. Oxidative decarboxylation of pyruvic acid is regulated by: a. cyclic AMP-dependent mechanism b. cyclic AMP-independent mechanism 4. The...