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Can high levels of NADH and low levels of NAD plus stimulate glycolysis?
No it cannot. NADH inhibits glycolysis, the Krebs Cycle and the electron transport chain. HIGH levels of NAD however does stimulate glycolysis but High levels of NADH and low levels of NAD does not stimulate glycolysis but rather inhibits it.
What are the two types of Feedback Inhibition?
In my understanding there are three types of feedback inhibition:SIMPLE: Enzyme inhibited by single end product.CUMULATIVE: More than one end product inhibits the same enzyme. That means that each product exerts partial inhibition and inhibition is cumulative.CONCERTED: More than one end product must bind the same enzyme simultaneously for any inhibition.I !
How does competitive inhibition differ from allosteric inhibition in terms of their mechanisms of action on enzyme activity?
Competitive inhibition occurs when a molecule competes with the substrate for the active site of an enzyme, blocking its function. Allosteric inhibition, on the other hand, involves a molecule binding to a site other than the active site, causing a conformational change that inhibits enzyme activity.
What is the mechanism by which a protein that binds to an operator inhibits transcription?
When a protein binds to an operator, it blocks the RNA polymerase from binding to the promoter region of the gene. This prevents the transcription process from starting, leading to inhibition of gene expression.
How does allosteric regulation differ from noncompetitive inhibition in terms of their mechanisms of action on enzyme activity?
Allosteric regulation involves a molecule binding to a site on the enzyme other than the active site, causing a conformational change that either activates or inhibits the enzyme. Noncompetitive inhibition involves a molecule binding to a site other than the active site, but it does not cause a conformational change. Instead, it blocks the active site, preventing substrate binding and enzyme activity.
What effect does iodoacetate have on glycolysis?
iodoacetate inhibits the enzyme glyceraldehyde 3-phosphate dehydrogenase which is a enzyme in glycolysis
Can high levels of NADH and low levels of NAD plus stimulate glycolysis?
No it cannot. NADH inhibits glycolysis, the Krebs Cycle and the electron transport chain. HIGH levels of NAD however does stimulate glycolysis but High levels of NADH and low levels of NAD does not stimulate glycolysis but rather inhibits it.
What are the two types of Feedback Inhibition?
In my understanding there are three types of feedback inhibition:SIMPLE: Enzyme inhibited by single end product.CUMULATIVE: More than one end product inhibits the same enzyme. That means that each product exerts partial inhibition and inhibition is cumulative.CONCERTED: More than one end product must bind the same enzyme simultaneously for any inhibition.I !
Which protein inhibits skeletal muscle contraction and what ion removes the inhibition?
Tropomyosin; calcium ions
End products of biosynthetic pathways often act to block the initial step in that pathway This phenomenon is called?
feedback inhibition. Feedback inhibition is a regulatory mechanism where the end product of a biosynthetic pathway inhibits the activity of the enzyme catalyzing the initial step, thereby regulating the overall rate of the pathway.
How does competitive inhibition differ from allosteric inhibition in terms of their mechanisms of action on enzyme activity?
Competitive inhibition occurs when a molecule competes with the substrate for the active site of an enzyme, blocking its function. Allosteric inhibition, on the other hand, involves a molecule binding to a site other than the active site, causing a conformational change that inhibits enzyme activity.
An enzyme citrate synthase in the Krebs cycle is inhibited by ATP What type of inhibition would this be?
Citrate synthase is inhibited by ATP. Obviously, the Krebs cycle produces ATP. This is the first step and one of the major regulatory steps in the pathway. If the cell has plenty of ATP, then it wouldn't need to keep making it, thus the pathway needs to be shut off. ATP inhibits the enzyme to shut off the pathway. This is an example of feedback inhibition (you can also call it negative inhibition or even product inhibition). Feedback inhibition is when the products of a certain biochemical pathway inhibit earlier enzymes, shutting down the pathway.
Is enterogastrone a case of stimulation or inhibition?
Enterogastrone inhibits forward movement (towards the anus). It is stimulated when a meal high in fat is eaten. This gives the bile secreted by the gall bladder time to work.
What hormones regulate glycolysis?
The hormones that regulate glycolysis are insulin and glucagon.Insulin is released by the pancreas when blood glucose levels are high for example after eating. Glucogen is released by the pancreas when blood glucose levels drop too far. It has the opposite effect of insulin.
What is the function of aldolase in regulation of glycolysis?
Aldolase catalyzes the cleavage of fructose 1,6-bisphosphate into glyceraldehyde 3-phosphate and dihydroxyacetone phosphate in glycolysis. This step is irreversible and serves as a regulatory point in glycolysis, controlling the flow of metabolites through the pathway.
What is the action of NaF on glucose level?
decreases blood glucose, as fluoride inhibits enolase enzyme in glycolysis, and there is an accumulation of phosphenolpyruvate and no pyruvate being produced, thus no energy.
Why methylene blue inhibits gram positive bacteria?
Methylene blue inhibits gram positive bacteria by disrupting their cellular respiration. It interferes with the electron transport chain, leading to a decrease in ATP production, which is essential for bacterial growth and survival. This ultimately results in the inhibition of bacterial growth and reproduction.
