Why does enzyme activity decrease when it is in solution that has either a too high or too low pH?

The shape of the active site changes

All enzymes only work in neutral solutions

Enzyme activity remains unchanged in different pH's

The shape of the substrate changes

If the shape of an enzyme changes so that it will not fit together with the substrate, it will not work. What two things can change the shape of the enzyme?

Both extreme pH and temperature changes

Nothing will change the shape of the enzyme.

What is true about enzymes?

They catalyze one specific type of reaction

They are unaffected by changes in pH

They are unaffected by changes in temperature

Their overall shape can change without affecting their function

Which of the following conclusions can be drawn from this graph?

The optimum pH of the enzyme is pH 6.6.

The optimum pH of the enzyme is pH 5.8

The enzyme’s activity increases as pH increases pH 5.0 to 9.0

The enzyme’s activity is greater around pH of 8.0 .

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

Enzyme decrease the activation energy of the reaction.

Enzymes increase the energy of the reactants.

Enzymes decrease the energy level of the products.

Enzymes reverse the direction of the reaction.

Which statement explains the effect of the inhibitor?

the inhibitor changes the shape of the active site preventing the substrate from attaching

the inhibitor causes the substrate to attach to the active site

the inhibitor changes the shape of the products

the inhibitor changes the shape of the substrate

Why does enzyme activity decrease when it is in solution that has either a too high or too low pH?

The shape of the active site changes

All enzymes only work in neutral solutions

Enzyme activity remains unchanged in different pH's

The shape of the substrate changes

Cells can produce over one thousand different enzymes at a time. Enzymes are critical to the metabolism of these cells, but why are so many different enzymes needed?

The active site of an enzyme can only bind to a specific substrate.

Cells are completely unable to control what enzymes they produce

The variety of enzymes prevents their actions from being inhibited.

The products of a reaction are always converted into new enzymes.

What elements would primarily be found in enzymes?

Carbon, Hydrogen, Oxygen, and Nitrogen only

Carbon, Hydrogen, and Oxygen only

Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus only

Enzymes are proteins that help increase the rate of chemical reactions inside cells. These proteins are composed of many simpler molecules called amino acids. Which of the following suggests that the shape of an enzyme determines the enzyme’s function?

Enzymes are specific to a substrate.

Enzymes can operate in a wide range of conditions.

Enzymes are activated by neighboring molecules.

Enzymes can be found in all life-forms.

Sucrase, also known as invertase, is a particular group of enzymes that convert sucrose hydrolysis into simple sugars like glucose and fructose. If the optimal for sucrase reactions is pH 6.2. What would most likely happen if the pH was reduced to pH 4?

the reaction would completely stop

there would be no change in the reaction

Which of the following is NOT a common misconception regarding enzymes?

Enzymes can be used over and over without being destroyed

Enzymes make chemical reactions occur

There are only a few enzymes that work in the human body

An enzyme only facilitates one reaction then it is broken down and reabsorbed

IB Enzymes 2

Authored by R Hamilton

Biology

9th - 12th Grade

NGSS covered

Used 25+ times

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IB Enzymes 2

A fever can be dangerous because.....

Letter E is......

Where do substrates bind on an enzyme?

The diagram shows the series of a reactions that convert lactose into a usable form.
If Enzyme 4 is denatured, the levels of which substance will increase?

What is the optimal pH of enzyme A?

What is structure A?

What is structure C?

The green-purple object at the first step in the image above is the...

The central picture of everything combined in the image is the...

Letter C is ...

Access all questions and much more by creating a free account

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IB Enzymes 2

A fever can be dangerous because.....

Letter E is......

Where do substrates bind on an enzyme?

The diagram shows the series of a reactions that convert lactose into a usable form.If Enzyme 4 is denatured, the levels of which substance will increase?

What is the optimal pH of enzyme A?

What is structure A?

What is structure C?

The green-purple object at the first step in the image above is the...

The central picture of everything combined in the image is the...

Letter C is ...

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Biology

The diagram shows the series of a reactions that convert lactose into a usable form.
If Enzyme 4 is denatured, the levels of which substance will increase?