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What happens to the phosphorylated glucose in glycolysis?
Glutamic acid covalently bonded with a phosphate group
Why are monosaccharides immediately phosphorylated upon entry into cells?
One example of modified monosaccharides are the phosphorylated sugars. An important phosphorylated sugar is glucose 6-phosphate, which is a glucose phosphorylated on carbon 6. The significance of this molecule is that it provides energy in certain metabolic pathways, and it can be converted and stored as glycogen when blood glucose levels are high. If blood glucose levels are low, glucose 6-phosphate can be converted back into glucose to enter the bloodstream once again. A unique property of glucose 6-phosphate is that once glucose is phosphorylated, the sugar possesses a negative charge. This prevents the molecule from leaving the lipid-bilayer membranes. This allows the cell to easily access the modified sugar to provide energy for metabolic pathways such as glycolysis, or convert it to glycogen as storage.
What are the steps of glucose?
Glucose is broken down in the first stage of respiration- glycolysis where it is phosphorylated by a molecule of ATP to form 1-6 glucose phosphate. It is then isomerised ti
The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by what?
Active transport, specifically through a protein pump such as the sodium-glucose cotransporter (SGLT). This process requires energy in the form of ATP to move molecules against their concentration gradient.
Which has more potential energy glucose or glucose plus P?
Glucose plus P (phosphate) has more potential energy than glucose alone. This is because the addition of a phosphate group increases the potential energy of the molecule due to the additional chemical bonds and electrostatic interactions present in the phosphorylated form.
Is Phosphorylation found in glycolysis?
Yes, phosphorylation is an important process in glycolysis. During glycolysis, glucose is phosphorylated to form glucose-6-phosphate, which is a key step in the pathway. Phosphorylation helps trap glucose inside the cell and also primes it for further metabolic reactions.
Why is the prosphorylation of glucose necessary?
The phosphorylation of glucose is necessary because it helps to trap glucose within the cell, as phosphorylated glucose cannot easily cross the cell membrane. This reaction, catalyzed by the enzyme hexokinase, converts glucose into glucose-6-phosphate, which is a key intermediate in various metabolic pathways, including glycolysis and glycogen synthesis. Additionally, phosphorylating glucose helps to regulate cellular metabolism by signaling that glucose is available for energy production.
Can aspartic acid be phosphorylated in biological systems?
Yes, aspartic acid can be phosphorylated in biological systems.
Describe the first reaction in glycolysis Is this reaction catalyzed by an enzyme?
The first reaction in glycolysis is the phosphorylation of glucose to glucose-6-phosphate by the enzyme hexokinase. This reaction involves the transfer of a phosphate group from ATP to glucose, requiring energy for activation.
What reaction is in the first reaction of glycolysis receives a phosphate group from ATP?
In the first reaction of glycolysis, glucose is phosphorylated to form glucose-6-phosphate. This reaction is catalyzed by the enzyme hexokinase (or glucokinase in the liver) and involves the transfer of a phosphate group from ATP to glucose. This phosphorylation is crucial as it helps to trap glucose within the cell and prepares it for further breakdown in the glycolytic pathway.
Which amino acids can be phosphorylated in biological systems?
In biological systems, amino acids such as serine, threonine, and tyrosine can be phosphorylated.
Which protein can be phosphorylated by protein kinase AA?
The protein that can be phosphorylated by protein kinase AA is called protein X.
