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2021-06-17

Which statement defines enzymatic activity?

Which statement defines enzymatic activity?

Answer. ➡️The statement that defines enzymatic activity is that the Enzymes regulate cellular functions through feedback mechanisms.

Which statement best describes enzymes activity?

Answer Expert Verified. The best which describes an enzyme is 2. Every enzyme can control one or more types of reaction whereby the rate of activity of an enzyme will be influenced by PH and temperature.

Which statement about enzymes is true?

Answer: The correct answer is A) An enzyme functions to increase the rate of a chemical reaction. Enzymes are the substances produced by living organisms and they speed up the chemical reactions occurring in the body.

What overall effect does adding a catalyst?

It holds reactant molecules in a good position for them to react. What overall effect does adding a catalyst have on a chemical reaction? It lowers the activation energy that is needed.

What is positive catalyst?

Positive catalyst: A catalyst which increases the rate of reaction is called positive catalyst. Such catalyst decreases activation energy by accepting a smaller path, so rate of reaction is increased. Negative catalyst (Inhibitor): A catalyst which decreases or retards the rate of reaction is called negative catalyst.

What are the positive and negative catalyst?

(i) Positive catalyst: When a catalyst increases the rate of chemical reaction, it is called positive catalyst. (ii) Negative catalyst: When a catalyst decreases the rate of chemical reaction it is called negative catalyst.

How does Mn2+ act as a catalyst?

The Mn2+ acts as a homogeneous catalyst because it is easily oxidised to Mn3+ by the MnO4- ions and then reduced back to Mn2+ ions by the C2O42- ions.

How does a catalyst work a level?

A catalyst is a substance which increases the rate of a reaction without being used up itself. They can either lower the activation energy of the reaction or change the mechanism of the reaction completely. Catalysts can either be a transition metal, a transition metal oxide, or an enzyme.

Which is an example of Autocatalysis?

Solution : Mn2+ ions produced in the reaction (D) acts as autocatalyst. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

Which is the autocatalytic enzyme of our body?

Hydrochloric acid creates an acidic environment, which allows pepsinogen to unfold and cleave itself in an autocatalytic fashion, thereby generating pepsin (the active form). Pepsin cleaves the 44 amino acids from pepsinogen to create more pepsin.

What is self catalyst?

: catalysis of a chemical reaction without the addition of a special catalyst : autocatalysis.

What are enzyme catalysts?

Enzyme catalysis is the increase in the rate of a process by a biological molecule, an “enzyme”. As with other catalysts, the enzyme is not consumed or changed by the reaction (as a substrate is) but is recycled such that a single enzyme performs many rounds of catalysis.

What is enzyme catalysis give an example?

Enzymes are biological catalysts. Enzymes are also proteins that are folded into complex shapes that allow smaller molecules to fit into them. The place where these substrate molecules fit is called the active site. Examples are lactase, alcohol dehydrogenase and DNA polymerase.

What is the difference between an enzyme and catalyst?

Catalysts are substances that increase or decrease the rate of a chemical reaction but remain unchanged. Enzymes are proteins that increase rate of chemical reactions converting substrate into product.

What is the mechanism of enzyme action?

An enzyme attracts substrates to its active site, catalyzes the chemical reaction by which products are formed, and then allows the products to dissociate (separate from the enzyme surface). The combination formed by an enzyme and its substrates is called the enzyme–substrate complex.