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Glycolytic and TCA cycle

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What enzymes in the glycolysis pathway in the liver catalyze irreversible reactions?

Glucokinase, phosphofructokinase-1, pyruvate kinase


Is it true that PEP is a feedback inhibitor of Phosphofructokinase?

No, it is not true. PEP, or phosphoenolpyruvate, is actually a substrate for phosphofructokinase (PFK), a key enzyme in glycolysis. PEP is converted to fructose-1,6-bisphosphate by PFK, which is an important step in the glycolytic pathway.


Phosphofructokinase is an important control enzyme in the regulation of cellular respiration of cellular respiration What is statement that describes a function of phosphofructokinase?

Phosphofructokinase is responsible for catalyzing the rate-limiting step in glycolysis, which is the breakdown of glucose to produce energy in the form of ATP. This enzyme helps regulate the overall flow of glucose through the glycolytic pathway to meet the energy demands of the cell.


What is phosphofructokinase?

Phosphofructokinase is an enzyme that plays a key role in glycolysis, the metabolic pathway that breaks down glucose to produce energy. It helps regulate the rate of glycolysis by catalyzing the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate. This enzyme is critical for energy production in cells.


What does PFK mean?

PFK can refer to phosphofructokinase, an enzyme involved in glycolysis, a metabolic pathway that converts glucose into energy. It can also stand for People for Kids, an organization that focuses on advocating for children's rights and well-being.


What is the control point in glycolysis?

The control point in glycolysis is the enzyme phosphofructokinase. This enzyme catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate, a key step in the glycolysis pathway. Phosphofructokinase activity is allosterically regulated by ATP, citrate, and AMP levels in the cell.


What is the role of phosphofructokinase-2 in glycolysis?

Phosphofructokinase-2 converts fructose-6-phosphate to fructose-2,6-bisphosphate.


What are the irreversible steps in glycolysis and how do they contribute to the overall regulation of the pathway?

The irreversible steps in glycolysis are catalyzed by the enzymes hexokinase, phosphofructokinase, and pyruvate kinase. These steps help regulate the pathway by controlling the flow of glucose through glycolysis. Hexokinase converts glucose to glucose-6-phosphate, phosphofructokinase converts fructose-6-phosphate to fructose-1,6-bisphosphate, and pyruvate kinase converts phosphoenolpyruvate to pyruvate. These irreversible steps ensure that once glucose enters glycolysis, it is committed to being broken down for energy production.


Which major group of rocks are involved in Pathway 1?

Igneous rocks are the major group of rocks involved in Pathway 1. This pathway involves the formation of rocks from the cooling and solidification of magma or lava. Examples include granite and basalt.


What are the irreversible reactions of glycolysis and how do they contribute to the overall regulation of the pathway?

The irreversible reactions of glycolysis are catalyzed by enzymes hexokinase, phosphofructokinase, and pyruvate kinase. These reactions help regulate the flow of glucose through the pathway by committing glucose to be broken down into pyruvate. This regulation ensures that glycolysis proceeds efficiently and that the cell can generate energy effectively.


What Abbreviations for enzymes involved with the breakdown of glucose?

Some abbreviations for enzymes involved in the breakdown of glucose are HK (hexokinase), GK (glucokinase), PFK (phosphofructokinase), PK (pyruvate kinase), and G6Pase (glucose-6-phosphatase).


What is an example of negative feedback in aerobic respiration?

Negative feedback in aerobic respiration can occur when high levels of ATP inhibit the enzyme phosphofructokinase, which is involved in the glycolysis pathway. This inhibition helps regulate the rate of ATP production, preventing excess ATP accumulation.