Question

Which of the following glycolytic enzymes is regulated by both allosteric regulation and reversible phosphorylation? Group...

Which of the following glycolytic enzymes is regulated by both allosteric regulation and reversible phosphorylation?

Group of answer choices

phosphoglyceromutase

pyruvate kinase

glyceraldehyde-3-phosphate dehydrogenase

phosphoglycerate kinase

cyclic AMP-dependent protein kinase

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Answer: Pyruvate kinase

Pyruvate kinase is used in the last step of glycolysis and its regulation is important while making pyruvate. They are regulated by both by allosteric regulation and reversible although its function is affected or regulated by various minor factors one important effector factor is FBP or fructose 1,6 bisphosphate which works allosterically to regulate the enzyme.

While there are various isozymes for PK one of the form is M2 which exists in both dimer and tetramer form. The tetramer form acts as the active enzyme but it can be regulated reverse phosphorylating it into dimer and making it inactive.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Which enzymes in glycolysis catalyze reactions that require free inorganic phosphate? Select all that apply. a)...
Which enzymes in glycolysis catalyze reactions that require free inorganic phosphate? Select all that apply. a) Hexokinase b) Phosphohexose isomerase c) Phosphofructokinase d) Aldolase e) Triose phosphate isomerase f) Glyceraldehyde 3-phosphate dehydrogenase g) Phosphoglycerate kinase h) Phosphoglycerate mutase i) Enolase j) Pyruvate kinase
Which of the following enzymes catalyzes an irreversible step of gluconeogenesis? Phosphoglucomutase Glucose-6-Phosphatase Pyruvate Kinase Glyceraldehyde-3-Phosphate...
Which of the following enzymes catalyzes an irreversible step of gluconeogenesis? Phosphoglucomutase Glucose-6-Phosphatase Pyruvate Kinase Glyceraldehyde-3-Phosphate Dehydrogenase
1. What is the number of ATP obtained from one acetyl CoA in the citric acid...
1. What is the number of ATP obtained from one acetyl CoA in the citric acid cycle? 2. For each molecule, identify the location where enzymes are available to metabolize them. Location options are Extracellular Space, Mitochondria, or Cytosol. ..... Polysaccharides Pyruvate Glucose Galactose Acetyl CoA Fructose 3. Put the enzymes (below) of glycolysis in the order in which they appear in the glycolytic pathway, from first to last. Fructose-1,6-biphosphate aldolase phosphoglucoisomerase hexokinase phosphofructokinase triosephosphate isomerase 4.   Put the enzymes...
The following question refers to regulated enzymes in glycolysis. Here is a summary of these enzymes....
The following question refers to regulated enzymes in glycolysis. Here is a summary of these enzymes. glycolysis reaction #1 is catalyzed by hexokinase glycolysis reaction #3 is catalyzed by phosphofructokinase (PFK) glycolysis reaction #10 is catalyzed by pyruvate kinase Which of the following statements about glycolysis regulation in liver cells is/are TRUE? All of the statements are true Liver hexokinase has a very low Km compared to muscle hexokinase Liver pyruvate kinase is activated allosterically by a glycolysis intermediate. Liver...
Which of the following correctly compares linear electron flow to cyclic electron flow in the electron...
Which of the following correctly compares linear electron flow to cyclic electron flow in the electron transport chain of photosynthesis. Group of answer choices Cyclic electron flow produces more glyceraldehyde-3-phosphate (GAP) and less 3-phosphoglycerate (3-PGA) than linear electron flow. Cyclic electron flow produces more 3-phosphoglycerate (3-PGA) and less glyceraldehyde-3-phosphate (GAP) than linear electron flow. Cyclic electron flow produces more ATP and less NADPH than linear electron flow. Cyclic electron flow produces more NADPH and less ATP than linear electron flow....
1)Which of the following will be affected in an opposite manner (inhibited by one and stimulated...
1)Which of the following will be affected in an opposite manner (inhibited by one and stimulated by the other) by cAMP-dependent protein kinase and AMP-activated protein kinase? Select all that apply Phosphofructokinase-2 in ischemic heart Lipolysis in adipose tissue Glycogenesis in skeletal muscle Glycogenolysis in liver Cholesterol biosynthesis in liver Gluconeogenesis in liver Glucose uptake via GLUT 4 transporters 1)Which of the following will be activated by phosphorylation of key enzymes by protein kinase A (cAMP dependent protein kinase? (select...
please answer 1-6 :) 1. Glycogen metabolism is regulated, up to a point, by a cyclic...
please answer 1-6 :) 1. Glycogen metabolism is regulated, up to a point, by a cyclic AMP cascade. At what point do glycogen synthesis pathways diverge from glycogen degradation pathways? a. Protein kinase A leads to the activation of glycogen degradation, and also to the inhibition of glycogen synthase by conversion from b to a. b. Phosphorylase kinase converts phosphorylase b to phosphorylase a and glycogen synthase a to glycogen synthase b. c. Protein kinase A leads to the activation...
MULTIPLE CHOICE 1. Many of the catabolic pathways converge to the common two-carbon intermediate: a. alanine....
MULTIPLE CHOICE 1. Many of the catabolic pathways converge to the common two-carbon intermediate: a. alanine. b. acetyl group of acetyl-CoA. c. lactic acid. d. glucose. e. carbon dioxide. 2. The lower (“energy payoff”) part of glycolysis: Only involves steps with DG close to zero, so it does not need to be regulated. Involves the formation of metabolites with high-energy phosphates. Involves enzymes that hydrolyse ATP to drive the pathway forward. Oxidises NADP+ to NADPH. 3. Gluconeogenesis begins with the...
The liver and kidneys are major sites of gluconeogenesis. Group of answer choices True False Flag...
The liver and kidneys are major sites of gluconeogenesis. Group of answer choices True False Flag this Question Question 391 pts The LDH isozyme in heart tissue can be allosterically inhibited by high concentrations of pyruvate. Group of answer choices True False Flag this Question Question 401 pts Glycogen in skeletal muscle serves as a reservoir of blood glucose. Group of answer choices True False Flag this Question Question 411 pts Glycogen synthase is nearly inactive when it is phosphorylated....
1. Fructose 6-phosphate is transformed by an enzymatic reaction to become fructose 1,6-bisphosphate using which nucleotide-based...
1. Fructose 6-phosphate is transformed by an enzymatic reaction to become fructose 1,6-bisphosphate using which nucleotide-based molecule? Select one: a. Pyruvate dehydrogenase b. Adenosine Triphosphate c. Phosphofructokinase d. Phosphoglycerate kinase e. Pyruvate kinase 2. Which of the following chemical reactions does not occur during aerobic glycolysis? Select one: a. oxidation of NADH b. phosphorylation of ADP c. reduction of NAD+ d. enzymatic action of PFK e. hydrolysis of ATP 3. The prokaryotic enzyme DNA polymerase III performs a similar function...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT