Enzymes

Label the parts of the enzyme model

a

b

c

d

Products

Active site

Substrate

Enzyme

Click on the temperature that this enzyme is having optimum activity.

Which enzyme is most efficient in a basic solution?

• A
• B

Match the following Enzyme Concepts

• A protein that Speeds Up Chemical Reactions

• Enzyme

• The Place where the Enzyme matches with the Substrate

• Substrate

• Less, work is done faster (More Helpers)

• It takes more/less energy to do work when enzymes are present....

• The biomolecule enzymes are made of

• Active Site

• Material enzyme is going to do work on

• Protein

What might cause an enzyme to change shape so that the substrate doesn't bond? (2 answers)

• heat change

• pH change

• too much enzyme

• too little enzyme

Tags

9C

Every enzyme has an ​ (a)   temperature, which will have the biggest reaction. However, if the temperature gets too high, the enzyme may become ​ (b)   and it won't be able to function.

• optimal
• denatured
• surprise
• absolute
• ignited

Answer explanation

The optimal temperature is the best temperature for that enzyme. High temperatures can denature an enzyme which causes it to lose its shape and no longer be able to function.

Pepsin is an enzyme that is produced in the stomach to break down proteins. What would be the optimal pH for pepsin?

• 2

• 6

• 8

• 14

Answer explanation

The stomach is acidic, meaning it has a low pH. Since pepsin works in the stomach, the optimal pH should also be low (acid).

Match the following enzymes to their substrates.

• Catalase

• Amylose

• Lactase

• Hydrogen peroxide

• Lipase

• Proteins

• Amylase

• Lipids

• Pepsin

• Lactose

Answer explanation

Notice how most of the enzymes end in "-ase."

The carbohydrates that end in "-ose" have similar names to the enzymes that break them down.

Circle the optimal temperature of the Enzyme according to this Graph.

Answer explanation

The optimal temperature for this enzyme is 75. That is where the reaction is the biggest.

Human body temperature is around 37 ^oC, and water has a neutral pH. What would be the optimal conditions for an enzyme found in the saliva?

• pH 7

  37 ^oC

• pH 2

  96 ^oC

• pH 7

  96 ^oC

• pH 2

  37 ^oC

Answer explanation

Water (and saliva) have a neutral pH of 7.