The model below shows an enzyme and two possible substrates. Which substrate is the enzyme most likely to act upon and why?

Substrate A because it fits the unique shape of the enzyme

Substrate B because it fits the unique shape of the enzyme

Both A and B because substrates change shape to fit the enzyme

Both A and B because enzymes can act on any substrate

What is the function of an enzyme?

enzymes speed up chemical reactions

enzymes break themselves into small pieces

enzymes slow down chemical reactions

enzymes combine products to form reactants

What happens when enzymes are heated to a high temperature?

The shapes of the enzyme are altered denature

The enzymes' amino acid sequence changes.

Which of these is NOT true?

Enzymes can only be used once in a chemical reaction.

Enzymes can denature (change shape) when the temperature gets too high.

Extreme pH can denature enzymes.

Enzymes speed up chemical reactions.

A medical company has developed a product that contains an enzyme that helps lactose intolerant individuals digest the sugar lactose, which is found in many dairy products. The company would like to know the ideal temperature at which to store this new medication. During a controlled experiment, the following data is collected: Based on the data, at which temperature would be the worst temperature to suggest to the pharmaceutical company store the medication and why?

The medication should not be stored at temperatures above 70 degrees because the enzyme begins to denature.

The medication should not be stored at room temperature because the enzyme has the most substrate available.

The medication should not be stored in an ice container because the data shows that the enzyme resists denaturing at colder temperatures.

The medication should not be stored in wam water because the heat from the water speeds up the chemical reaction.

Enzymes are made of fatty acids.

Enzymes speed up chemical reactions.

Enzymes react best at a specific temperature.

Enzymes only control ONE type of reaction.

The table below shows the results of an experiment completed in a biology class. Students placed hydrogen peroxide on several food samples and recorded the relative amount of fizz that each produced. The fizz was produced by oxygen bubbles released by the enzyme catalase during the chemical reaction. Catalase is found in almost every living cell. Catalase Experiment Food Rate of Fizzing (1-10) Boiled Potato 0 Raw Potato 4 Cooked Liver 1 Raw Liver 10 Which of these is a valid conclusion from the data?

Raw liver produced the most oxygen bubbles, followed by raw potato. The catalase enzyme was fully functional and allowed the reaction to occur quickly.

Plant cells produce more oxygen bubbles than animal cells because plant cells contain more protein, and therefore, more enzymes.

Boiled potato and cooked liver produced the most oxygen bubbles. The catalase enzyme was denatured and allowed the reaction to occur quickly.

Cooking the foods seems to increase the activity of the catalase enzyme because it speeds up the rate at which the enzyme is able to function.

You are preparing to run your first marathon and are debating what to eat before the race. Which meal described below would provide the greatest amount of quick energy for your muscles?

Toast and Orange Juice, which contains carbohydrates

Eggs and Milk, which contains protein

Water and Celery, which does not contain many nutrients

Enzymes

Quiz

•

Biology

•

9th - 12th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-2, MS-LS1-7, HS-PS1-5

Standards-aligned

ellis appling

Used 24+ times

FREE Resource

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25 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

How do enzymes speed up chemical reaction?

Increasing activation energy

Decreasing activation energy

Increasing deactivation energy

Decreasing deactivation energy

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a substance called if it speeds up a chemical reaction?

reusable

catalyst

specific

fragile

MULTIPLE CHOICE QUESTION

30 sec • 12 pts

Each enzyme only has 1 substrate that will fit its active site. What is this called?

reusablility

denaturation

specificity

fragility

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The human stomach has a pH of about 3 and contains many enzymes to help digest food. Other parts of the digestive tract, such as the small intestine, have a higher pH. Pepsin and trypsin are two enzymes that help to digest proteins. A graph of the enzyme activity is shown below.

Which enzyme is most likely found in the stomach and why?

Pepsin, because the lowest activity level is at a pH of 3

Trypsin, because the lowest activity level is at a pH of 4.

Pepsin, because the highest activity level is at a pH of 3.

Trypsin, because the highest activity level is at a pH of 8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Enzymes increase the energy of the reactants.

Enzymes decrease the energy level of the products.

Enzyme decrease the activation energy of the reaction.

Enzymes reverse the direction of the reaction.

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

The optimum pH of the enzyme is 6.6.

The optimum pH of the enzyme is 5.8

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

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

Any substance that is acted upon by an enzyme is called a(n)?

Coenzyme

Substrate

Vitamin

Polypeptide

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Enzymes

25 questions

How do enzymes speed up chemical reaction?

What is a substance called if it speeds up a chemical reaction?

Each enzyme only has 1 substrate that will fit its active site. What is this called?

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

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

Any substance that is acted upon by an enzyme is called a(n)?

Based on the graph, what is the optimal temperature for this enzyme?

In the diagram, what is letter A?

Enzymes are...

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