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Amylases has an optimal pH of around 7. HCl has a higher pH, which will denature the cell, changing the shape of it and breaking down the bonds so the substrate (in this case starch) wont be able to bind with it.

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Q: Why does 0.8 percent HCl stop hydrolysis of starch by amylase?
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What is the purpose of adding NaOH to the mixture before taking the polarimeter reading?

It is to neutralize the solution and to stop the hydrolysis.


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Saliva contains a digestive enzyme that converts starch into sugar.


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Amylase - urine?

DefinitionThis is a test that measures the amount of amylase in urine. Amylase is an enzyme that helps digest carbohydrates. It is produced mainly in the pancreas and the glands that make saliva.Amylase may also be measured with a blood test. See: Amylase - bloodHow the test is performedA urine sample is needed. The test may be performed using a single urine sample or a 24-hour urine collection. For information on how to collect a sample, see:Clean catch urine test24-hour urine collectionHow to prepare for the testYour health care provider may tell you to stop taking certain drugs that can affect test results. Drugs that can increase amylase levels include:AsparaginaseAspirinPentazocineCholinergic agentsCorticosteroidsIndomethacinLoop and thiazide diureticsMethyldopaCodeineMorphineBirth control pillsHow the test will feelThe test involves only normal urination, and there is no discomfort.Why the test is performedThis test is done to diagnose pancreatitis and other diseases that affect the pancreas. Your doctor may also order this test to see how treatment for such conditions is working.Normal ValuesThe normal range is 2.6 to 21.2 international units per hour (IU/h).What abnormal results meanAn increased amount of amylase in the urine is called amylasuria. Increased amylase levels may indicate:Acute pancreatitisAlcohol consumptionCancer of the pancreas, ovaries, or lungsCholecystitisEctopic or ruptured tubal pregnancyGallbladder diseaseInfection of the salivary glands (mumps or an obstruction)Intestinal obstructionPancreatic duct obstructionPerforated ulcerDecreased amylase levels may be due to:Damage to the pancreasKidney diseasePancreatic cancerToxemia of pregnancyWhat the risks areThere are no risks.ReferencesOwyang C. Pancreatitis. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 147.

Related questions

At what temperature does fungal amylase stop working?

Two degrees.


Why you use ice in the hydrolysis of ethyl acetate?

to freeze the reaction mixture, means to stop the further hydrolysis of ethyl acetate so that our readings couldn't interrupt.


Why does freezing have an effect on amylase?

Freezing should have an effect on amylase. Amylase is an enzyme, which is therefore a protein, and has optimum conditions. Freezing it will severely slow it down, and I'm pretty sure will denature it, so yes it will completely reduce if not stop the effect of amylase. Freezing does not denature enzymes, heat does.


Why does the digisition of starch stops when food reaches the stomach?

Carbohydrate digestion happens mostly in the mouth and esophagus, surprisingly. This combines with the fact that the enzymes in saliva that cause digestion stop functioning when they reach the stomach.


What is the opitmal pH for salivary amylase?

identify two pH values at which salivary amylase activity stop?


What is the purpose of adding NaOH to the mixture before taking the polarimeter reading?

It is to neutralize the solution and to stop the hydrolysis.


Why does iodine stop turning starch blue when saliva is present?

Saliva contains a digestive enzyme that converts starch into sugar.


How is cellulose used by starch?

I isn't, stop asking Wiki awnsers >:(


What effects do increased temperature have on the activity of salivary amylase?

Increase the temperature too much and this protein will denature and stop working.


Why did iodine stop turning blue-black?

Because it is alkaline


Why did they stop making block form of argo laundry starch?

Because people began eating it.


Is argo starch a drug?

It is just as addictive as drugs. I have been eating Argo Starches for 26years... I find it impossible to stop. If you start eating Argo Starches you will become a starch addict.