Enzyme and Catalyst Quiz

In a science experiment, Lily, Mia, and Henry are observing a chemical reaction. They notice that the reaction is happening faster than expected. They realize that a substance has been added to the reaction. What could be the role of this substance?

• This substance could be a catalyst that speeds up the chemical reaction by reducing the amount of activation energy needed to start that reaction.

• This substance could be a biological molecule that acts as a catalyst in a living organism.

• Both A and B.

• None of the above.

Tags

NGSS.HS-PS1-5

Abigail, James, and Priya are conducting a science experiment. They noticed that the reaction they are observing is happening faster than expected. What could be the role of enzymes in this scenario?

• To speed up the reaction by reducing the energy needed.

• To change the shape of the substrate.

• To be consumed during the reaction.

• To prevent the reaction from occurring.

Tags

NGSS.HS-PS1-2

Emma, Oliver, and Benjamin are studying for their biology exam. They come across a question about the "Lock and Key" model. They want to understand how enzymes work in real-world scenarios. Can you help them?

• They suggest that enzymes change the shape of the apple to fit the enzyme when Emma eats an apple.

• They propose that enzymes work as a specific lock for the apple compounds they interact with when Oliver eats an apple.

• They imply that enzymes are reused by breaking down into smaller enzymes when Benjamin digests his food.

• They prevent the apple from entering the active site of the enzyme when Emma eats an apple.

During a science experiment, William and Noah observed a catalysis process. What happened during this process?

• They noticed that the enzyme was consumed.

• They found that the substrate was changed or combined with another molecule to make something new.

• They saw that the enzyme changed into a product.

• They observed that the active site was closed off.

The food we eat provides the energy our bodies need. We eat carbohydrates, lipids, and proteins. As food is broken down, the compounds are rearranged through chemical reactions forming new molecules that support growth and provide energy. Each biomolecule is made of monomers or building blocks. Which of these did not correctly pair the macromolecule and its monomer.

• Lipids: fatty acid

• Nucleic acid: DNA

• Carbohydrate: monosaccharide

• Protein: amino acid

Mia is baking a cake and she uses an enzyme to break down the substrate in the ingredients. What happens when the enzyme lets go of the substrate?

• The enzyme is ready to be used again by Mia.

• The substrate becomes a permanent part of the enzyme.

• The enzyme stops working.

• The active site disappears.

Explain how the induced fit model of enzyme action differs from the lock and key model.

Describe how temperature can affect enzyme activity.

Explain how pH levels can affect the shape of proteins and enzyme activity.

What are inhibitors and how do they affect enzyme activity?