Homework Answers
The first step of glycolysis is catalyzed by Hexokinase.
Hexokinase catalyzes the phosphorylation of six-carbon sugars. Hexokinase phosphorylates glucose using ATP as the source of the phosphate, producing glucose-6-phosphate, aqaq1q more reactive form of glucose.
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Which of the following enzyme catalyzes the first step of glycolysis? * Hexokinase Pyruvate kinase Glucokinase...
Which of the diagrams illustrates the way in which the rate of an enzyme-controlled reaction depends...
Which of the diagrams illustrates the way in which the rate of an enzyme-controlled reaction depends on substrate concentration? * А B Rate of reaction MÚN Substrate concentration A B D When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose Which of the following enzyme groups can catalyse oxidation reactions? * O phosphorylases isomerases hydrolases dehydrogenases...
1. Hexokinase II (the isoform usually discussed in biochemistry classes as part of glycolysis) catalyzes the...
1. Hexokinase II (the isoform usually discussed in biochemistry classes as part of glycolysis) catalyzes the first step in glycolysis. The isoform of hexokinase that is expressed in most tumor cells is bound to the mitochondrial outer membrane facing the cytosol. Propose two reasons why this would be beneficial to the tumor cell. 2. Another highly regulated enzyme in glycolysis is phosphofructokinase (PFK1). There is evidence from some tumors that PFK1 undergoes a posttranslational proteolysis that yields a truncated functional...
Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose-6-phosphate. Which...
Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose-6-phosphate. Which of these statements are accurate? The conformational shift that occurs when glucose, but nox water, enters the active site prevents water from hydrolyzing ATP Most kinases require the presence of a monovalent metal ion cofactor to prevent ATP hydrolysis. Hexokinase transfers the terminal phosphate of ATP to carbon 3 of glucose. Hexokinase consists of two domains, or lobes, that come together when glucose and...
1) Select the cellular (and subcellular, if relevant) location for each enzyme listed below. (Cytoplasm,Inner membrane...
1) Select the cellular (and subcellular, if relevant) location for each enzyme listed below. (Cytoplasm,Inner membrane of mitochondria, outer membrane of mitochondria, Matrix of mitochondria) Phosphofructokinase: ATP synthase: Hexokinase: Pyruvate dehydrogenase: Aldolase: Citrate synthase: NADH dehydrogenase complex: 2) Based on our discussion in class, which enzyme performs the first committed step in glycolysis? ( i picked hexokinase on this and got it wrong) a. phosphofructokinase b. pyruvate kinase c. hexokinase d. cytochrome e. aldolase
Explain in detail how PFK-1, hexokinase, glucokinase, pyruvate kinase, glucose-6-phosphatase, fructose-1,6-bisphosphatase-1, pyruvate carboxylase & PEPCK are...
Explain in detail how PFK-1, hexokinase, glucokinase, pyruvate kinase, glucose-6-phosphatase, fructose-1,6-bisphosphatase-1, pyruvate carboxylase & PEPCK are regulated & compare their regulation in liver vs. skeletal muscle & brain when blood glucose levels are high (i.e. a fed state) & low (i.e. a fasting or starvation state).
What is the answer for this question? What rqgulatory enzyme of glycolysis is skipped during fructose...
What is the answer for this question?
What rqgulatory enzyme of glycolysis is skipped during fructose metabolism? hexokinase phosphoglucose isomerase phosphofructokinase pyruvate kinase
Which of the following enzymes catalyzes a reaction that is normally reversible in the cell? a....
Which of the following enzymes catalyzes a reaction that is normally reversible in the cell? a. pyruvate kinase b. Phosphoglyceromutase c. phosphofructokinase-1 d. Hexokinase
Conversely, in muscle cells, low energy charge ["activates or inhibits"] glycolysis. Specifically, AMP activates the enzyme ["phosphofructokinase...
Conversely, in muscle cells, low energy charge ["activates or inhibits"] glycolysis. Specifically, AMP activates the enzyme ["phosphofructokinase 1 or hexokinase"] . Pyruvate kinase is positively regulated by [fructose 1,6-bisphosphate or glucose 6-phosphate"] through feed-forward activation. The enzyme ["hexokinase or phosphofructokinase 1] is not affected. Choose one of the answers in the brackets.
please explain answer Glycolysis. In the third step of glycolysis, the enzyme phosphofructokinase transfers a phosphate...
please explain answer
Glycolysis. In the third step of glycolysis, the enzyme phosphofructokinase transfers a phosphate group from ATP to fructose-6-phophate to generate fructose- 1,6- bisphosphate. In contrast, in step 10, the enzyme pyruvate kinase transfers a phosphate group from phosphoenolpyruvate to ADP to generate ATP. Using what you know about the standard free energy change associated with phosphate bonds, (briefly) explain why we observe this difference.
Question 7 (1 point) The first step of beta oxidation is catalyzed by the enzyme . The cofactor u...
We were unable to transcribe this imageQuestion 7 (1 point) The first step of beta oxidation is catalyzed by the enzyme . The cofactor used is We were unable to transcribe this imageQuestion 15 (1 point) Which of the following glycolytic enzymes catalyses a substrate level phosphorylation? Hexokinase Phosphoglycerate kinase Phosphofructokinase-1 Glyceraldehyde 3-phosphate dehydrogenase
Question 7 (1 point) The first step of beta oxidation is catalyzed by the enzyme . The cofactor used is
Question 15 (1 point) Which of...
Which of the diagrams illustrates the way in which the rate of an enzyme-controlled reaction depends on substrate concentration? * А B Rate of reaction MÚN Substrate concentration A B D When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose Which of the following enzyme groups can catalyse oxidation reactions? * O phosphorylases isomerases hydrolases dehydrogenases...
Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose-6-phosphate. Which of these statements are accurate? The conformational shift that occurs when glucose, but nox water, enters the active site prevents water from hydrolyzing ATP Most kinases require the presence of a monovalent metal ion cofactor to prevent ATP hydrolysis. Hexokinase transfers the terminal phosphate of ATP to carbon 3 of glucose. Hexokinase consists of two domains, or lobes, that come together when glucose and...
What is the answer for this question?
What rqgulatory enzyme of glycolysis is skipped during fructose metabolism? hexokinase phosphoglucose isomerase phosphofructokinase pyruvate kinase
please explain answer
Glycolysis. In the third step of glycolysis, the enzyme phosphofructokinase transfers a phosphate group from ATP to fructose-6-phophate to generate fructose- 1,6- bisphosphate. In contrast, in step 10, the enzyme pyruvate kinase transfers a phosphate group from phosphoenolpyruvate to ADP to generate ATP. Using what you know about the standard free energy change associated with phosphate bonds, (briefly) explain why we observe this difference.
We were unable to transcribe this imageQuestion 7 (1 point) The first step of beta oxidation is catalyzed by the enzyme . The cofactor used is We were unable to transcribe this imageQuestion 15 (1 point) Which of the following glycolytic enzymes catalyses a substrate level phosphorylation? Hexokinase Phosphoglycerate kinase Phosphofructokinase-1 Glyceraldehyde 3-phosphate dehydrogenase
Question 7 (1 point) The first step of beta oxidation is catalyzed by the enzyme . The cofactor used is
Question 15 (1 point) Which of...
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