Which is the MOST valid conclusion based on this graph?

Enzyme function decreases after a certain favorable temperature.

Enzymes work most effectively at low temperatures.

Enzymes are not affected greatly by temperature.

Raising the temperature always makes an enzyme work better.

Enzymes are protein catalysts. What is the role of a catalyst?

Lowers the activation energy of a reaction.

Allows only irreversible reactions to happen.

Eliminates the activation energy of a reaction.

Provides extra energy for a reaction.

Living things use enzymes in the chemical reactions of metabolism. When food is digested, it is metabolized to release energy. Which statement best describes the role of an enzyme in this process?

The active site of the enzyme binds to a substrate on a food molecule and the enzyme changes shape slightly, causing a chemical reaction to happen.

Because enzymes are proteins, they only react with other protein molecules, resulting in the production of glucose.

The active site of the enzyme attached to the substrate of a food molecule produces carbon molecules, the building blocks of cells.

The active site of an enzyme attached to a substrate prevents the chemical reactions involved in metabolism from happening too quickly.

Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly's tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction?

Luciferase decreases the amount of energy required for the reaction to start.

Luciferase increases the amount of time the light is visible.

Luciferase decreases the temperature of the environment inside the body of the firefly.

Luciferase increases the number of sites on luciferin that must bind to oxygen.

What happens to enzymes after a chemical reaction?

They remain unchanged and are reusable

All of these are true of enzymes

Enzymes speed up a chemical reaction by...

Lowering the energy of activation

Allowing reactions to process at their own speed

If an enzyme becomes over heated what effect, if any, will the heat have on the enzymatic activity?

The enzyme will not be able to catalyze reactions.

The enzyme will not store much chemical energy.

The enzyme will lose its net electrical charge.

The enzyme will lose stored genetic information.

Biomolecules & Enzymes

Authored by Teagan Graves

Biology

9th Grade

NGSS covered

Used 1+ times

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41 questions

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The figure above shows a complex molecule that is built from special 5-carbon sugars, a phosphate group, and nitrogenous bases. What is the name of that complex structure?

starch

glycogen

amino acid

nucleic acid

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

When food molecules are broken down inside cells, the energy from the food that we use is called -

ATP

Proteins

DNA

RNA

Tags

NGSS.HS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The figure above is a(n) ______________, which is a type of lipid.

Phospholipid

Amino Acid

Nucleotide

Monosaccrahide

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these compounds are NOT classified as carbohydrates?

Starch

Polysaccharide

Lipid

Sugar

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The building block, or monomer, of a protein is a(n) –

Glycerol and 3 fatty acid

Monosaccharide

Nucleotide

Amino Acid

Tags

NGSS.HS-LS1-6

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following is the most significant contribution DNA makes to the formation of an organism?

Energy

Information

Sugar

Matter

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A biomolecule that is a large, complex set of chains composed of alternating subunits called nucleotides has which of these functions in the cell?

Storing Genetic Information

Catalyzing Cellular Reactions

Building Tissue

Storing Energy

Tags

NGSS.HS-LS3-1

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Biomolecules & Enzymes

The figure above shows a complex molecule that is built from special 5-carbon sugars, a phosphate group, and nitrogenous bases. What is the name of that complex structure?

When food molecules are broken down inside cells, the energy from the food that we use is called -

The figure above is a(n) ______________, which is a type of lipid.

Which of these compounds are NOT classified as carbohydrates?

The building block, or monomer, of a protein is a(n) –

Which of the following is the most significant contribution DNA makes to the formation of an organism?

A biomolecule that is a large, complex set of chains composed of alternating subunits called nucleotides has which of these functions in the cell?

Beeswax is a waxy substance that is produced by bees and then harvested by humans for a variety of uses. Ancient Romans used beeswax as a waterproofing agent because it is not water-permeable. Beeswax is which of the following types of organic molecule?

Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly into monomers. This chemical reaction produces which of the following?

Students were given a list of seven elements and asked to identify the four elements that are most abundant in biomolecules. Which table correctly identifies the four most-abundant elements in biomolecules?

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