Answer:
A physical change effects a substance physically. Examples include cutting, bending, dissolving, freezing, boiling, and melting.
A chemical change effects a substance chemically. Examples include burning, rusting, and digesting.
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All of the following except C.Sleeping releases Dopamine naturally
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The germ theory of disease states that many diseases are caused by the presence and action of specific <span>microorganisms.</span>
Answer: C) Whales eating plankton
Explanation: This is the only answer that relates to digestion
The amount of p-nitrophenol relates to the cellobiase activity - The change in amount leads to a change in the yellow color of the reaction that presents only in presence of p-nitrophenol.
Cellobiase is an enzyme that catalyzes the hydrolysis of β1-4 glycosidic bonds found in cellulose. Organisms like fungus and some bacteria are able to break down cellulose with help of this enzyme. The substrate is cellulose and the product is glucose catalyzed by cellobiase. It is clear/colorless, and therefore difficult to detect quantitatively.
Enzymatic Activity of Cellobiase
- p-nitrophenyl glucopyranoside is used as a substrate which is an artificial substrate that binds to the Cellobiase and is broken down similarly to cellulose and produces glucose and p-nitrophenol.
- This p-nitrophenol reacts with a basic solution called stop solution that stops the reaction and turns the solution yellow.
- The amount of yellow color is proportional to the amount of p-nitrophenol present which means this color help in knowing the Cellobiase activity.
Thus, the change in amount leads to a change in the yellow color of the reaction that presents only in presence of p-nitrophenol.
Learn more about p-nitrophenol:
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