What is the purpose of an enzyme?

give permission for the reaction

control how many reactions occur

The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules. During this reaction, what happens to the ‘catalase’?

The enzyme would remain unchanged in any way.

The enzyme would become products: O2 and H20

The enzyme would be fully used up and discarded.

The enzyme would become a new type of enzyme.

Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?

they change their amino acid sequence

Which of the following determines an enzyme's effectiveness?

not enough enzymes; too many substrates

Why does the shape of an enzyme determine its function?

enzymes are specific to substrates (lock and key)

enzymes can work with any substrate

enzymes are activated by molecules

What are the four biological molecules?

proteins, carbohydrates, lipids, nucleic acids

As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach has a pH of 2 due to the presence of hydrochloride acid (HCl), and the small intestine has a pH ranging from 7 to 9. HCl converts pepsinogen into pepsin, an enzyme that digests proteins in the stomach. Which of the following most likely happens to pepsin as it enters the small intestine?

It's shape changes to engulf large proteins.

It's activity increases to digest more proteins.

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements?

Enzymes function best at a specific temperature.

The body needs to be warm to prevent hypothermia.

The body is kept relatively warm to prevent too much enzyme action.

There is no connection between the two statements.

Which of the following biological molecules is correctly paired with one of the functions it primarily serves in living cells?

nucleic acids - store genetic information

lipids - catalyze chemical reactions

carbohydrates - component of cytoskeleton

proteins - long term energy storage

Which best describes how enzymes function in the body?

Enzymes lower the activation energy of reactions.

Enzymes are converted into products by the reactions they catalyze.

One enzyme can catalyze many different reactions.

An enzyme is used once and then destroyed by the cell.

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.

Biomolecules and Enzymes

Authored by Heather Williams

Biology

9th Grade

NGSS covered

Used 113+ times

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41 questions

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which biomolecule contains pastas and breads?

Lipid

Protein

Nucleic Acid

Carbohydrate

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which biomolecule helps form body structures like muscles?

Nucleic Acid

Carbohydrate

Protein

Lipids

Which biomolecule is responsible for insulation and long term energy storage?

Protein

Nucleic Acid

Lipid

Carbohydrate

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which biomolecule includes sugars, cellulose and starch?

Lipids

Proteins

Carbohydrates

Nucleic Acid

Which biomolecule is made of the monomer amino acids?

Nucleic Acid

Carbohydrate

Protein

Lipid

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which biomolecule is your main source of energy?

Nucleic Acid

Protein

Lipid

Carbohydrate

Which biomolecule contains fats, oils, and waxes?

Proteins

Nucleic Acid

Lipids

Carbohydrate

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Biomolecules and Enzymes

Which biomolecule contains pastas and breads?

Which biomolecule helps form body structures like muscles?

Which biomolecule is responsible for insulation and long term energy storage?

Which biomolecule includes sugars, cellulose and starch?

Which biomolecule is made of the monomer amino acids?

Which biomolecule is your main source of energy?

Which biomolecule contains fats, oils, and waxes?

What do monomers do?

The monomer of a protein is called...

Enzymes are considered to be

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