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Why is the results different in glucose and glucose-1 phosphate as substrate?
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What substrate is converted into glucose 6 phosphate by the enzyme hexokinase?
Glucose, although only the liver uses a different enzyme, called glucokinase which does the same thing.
Is sucrose a substrate?
The Substrate for amylase are starch (amylose and Amylopectin), glycogen, and various Oligosaccharides.
The process of glycogen to glucose?
Glycogen is a highly branched polymeric structure containing glucose as the basic monomer. First individual glucose molecules are hydrolyzed from the chain, followed by the addition of a phosphate group at C-1. In the next step the phosphate is moved to the C-6 position to give glucose 6-phosphate, a cross road compound. Glucose-6-phosphate is the first step of the glycolysis pathway if glycogen is the carbohydrate source and further energy is needed. If energy is not immediately needed, the glucose-6-phosphate is converted to glucose for distribution in the blood to various cells such as brain cells.
What substrate would fit into the active site of maltase?
2 glucose
What reaction does the enzyme hexokinase catalyze?
First step of glycolysis- the phosphorylation of glucose to glucose-6-phosphate.
What is the substrate of phosphorylase?
The substrate is Glucose-1-phospate which is broken down by only Phosphorylase and produces Starch as its end product
What substrate is converted into glucose 6 phosphate by the enzyme hexokinase?
Glucose, although only the liver uses a different enzyme, called glucokinase which does the same thing.
Is glucose a product or substrate?
both
How many molecules of ATP are gained by substrate-level phosphorylation from the complete breakdown of a single molecule of glucose in the presence of oxygen?
In substrate level phosphorylation, the ADP is phosphorylated directly by the transfer of phosphate group from substrate. If we consider glucose, then we get four substrate level phosphorylated ATPs, net gain of two in glycolysis and other two are formed when the two pyruvate molecules formed after glycolysis enter the TCA cycle.
The enzyme hexokinase catalyzes the first step of glycolysis, and is crucial to initiating the process and preventing the initial substrate from easily traveling out of the cell (as its pre-reaction structure is membrane permeable)?
Glucose, glucose-6-phosphate
How is a small amount of ATP made in glycolysis and the kerb cycle?
It is made from a transfer of a phosphate group from a fragment of glucose to ADP.
What is substrate of maltase?
maltase is found in intestinal juice and hydrolyzes maltose to glucose. Substrate = maltose Product = glucose
Is Phosphorylation found in glycolysis?
Yes, the early stages of glycolysis involve phosphorylation. glucose + P -> glucose-6-phosphate -> (fructose-6-phosphate = an isomer) -> fructose -1,6 - bisphosphate. Therefore, in the first 4 steps, the starting substance glucose is phosphorylated twice to give fructose -1,6- bisphosphate, which can be split into two triose phosphates.
Why do molecules of glucose galactose and fructose react differently during metabolism?
Because enzymes can only catalyse reactions of molecules with specific shapes. Glucose, galactose and fructose all have different shapes, so they need to undergo different reactions in order to be metabolised. All sugars are converted to fructose phosphate before metabolism begins. This happens to fructose by phosphorylating it directly, to glucose by phosphorylating glucose, then converting the glucose phosphate to fructose phosphate, and to galactose by converting the galactose to glucose.
What are the substrate for cellular respiration?
The substrate that begins the process of cellular respiration is most commonly glucose. It can also be proteins and lipids.
What is glycocsis?
Glycogenolysis is when Glucose, galactose, and fructose are carbonhydrates are together in a cycle. --- My answer from my biochemistry class: -Glycogenolysis is the metabolism of glycogen. -In the liver, glycogen synthesis and degradation are regulated to maintain blood-glucose levels as required to meet the needs of the organism as a whole. -In muscle, the processes are regulated to meet the energy needs of the muscle itself. -Consists of 3 steps: 1. the release of glucose-1-phosphate from glycogen. 2. The remodeling of the glycogen substrate to permit further degradation. 3. The conversion of glucose-1-phosphate into glucose-6-phosphate for further metabolism. -glucose-6-phosphate has 3 fates: 1. it is the initial substrate for glycolysis 2. it can be converted into free glucose for release into the bloodstream 3. it can be processed by the pentose phosphate pathway to yield NADPH and ribose derivatives.
Glucose to glucose 6-phosphate. Irreversible. Hexokinase/gluckokinase. Requires ATP and Mg2?
Glucose to glucose 6-phosphate. Irreversible. Hexokinase/gluckokinase. Requires ATP and Mg2+
