Lesson 10 - Enzymes

Multiple Choice

Enzymes are

• Lipids

• Protein

• Carbohydrates

• Nucleic Acids

Multiple Choice

Enzymes are responsible for-

• Speeding up reactions

• Giving the body energy

• Slowing down reactions

Multiple Choice

Which of these is most likely an enzyme?  

• Sucrose

• Galactose

• Fructose

• Amylase

Multiple Choice

Letter D...

• active site

• enzyme

• substrate

• products

Multiple Choice

Letter B...

• active site

• enzyme

• substrate

• products

Multiple Choice

Letter c...

• active site

• enzyme

• substrate

• products

Multiple Choice

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

• reusablility

• denaturation

• specificity

• fragility

Multiple Choice

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

• reusable

• catalyst

• specific

• fragile

Multiple Choice

An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

• true

• false

Multiple Choice

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

• a substrate
• an enzyme
• a product
• an active site

Multiple Choice

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered denature

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

Dropdown

Enzymes are ​

Select answer

that ​

Select answer

chemical reactions by​

Select answer

the amount of activation energy required to start the reaction.

Labelling

1.Fill out the graphic organizer below:

Drag labels to their correct position on the image

Nucleic Acid

Amino Acid

Quick Energy

Store energy

Glucose

genetic Info

chemical reactions

Protein

Fatty Acid

Drag and Drop

Enzymes bind with a specific

Placeholder

at the enzyme's ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

active site

substrate

induced fit

lock and key

Multiple Choice

Taq polymerase is an enzyme used in the polymerase chain reaction (PCR) to replicate fragments of DNA. A study published in 1976 examined the properties of Taq polymerase after the enzyme was isolated from Thermus aquaticus, a thermophilic bacterium that lives in the hot springs of Yellowstone National Park. The graph shows one of the results of the study. Which statement about enzyme activity is best supported by this graph?

• An enzyme must be composed of multiple polypeptides, or subunits, to be active.

• An enzyme’s rate of activity increases with time until it becomes inactive.

• An enzyme functions best under specific temperature conditions.

• An enzyme works equally well in bacteria that are adapted to high temperatures and in eukaryotic cells such as human cells.

Multiple Choice

The enzyme-substrate complex is formed when?

• The enzyme combines with a substrate.

• The enzyme reacts with a protein.

• An enzyme dissolves water.

• An enzyme is placed at a high temperature.

Enzymes are Biological Catalysts

• They are proteins

• Catalysts speed up chemical reactions

• Structure = Function: Enzymes are specific to their Substrate (reactants). Active site of the enzymes fits together with the substrate(s)

• Different reactions require different enzymes

Enzyme Specificity - The shape of the enzyme (structure) fits it's substrate (function)

The induced-fit model is the more accurate model

Multiple Choice

• F

• G

• H

• J

Optimal Enzyme Function

When the reaction rate is the highest!

Multiple Choice

Which enzyme is most efficient in a basic solution?

• A

• B

Multiple Choice

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 .

Factors affecting reaction rates

• Substrate concentration

• Enzyme concentration

• pH, temperature, and ion concentrations

Multiple Choice

• A

• B

• C

• D

Denaturation = to lose shape

• Structure (shape) = function

• If enzymes lose their shape they no longer function correctly

• Lower enzyme function = slower reaction rates

• Factors that can affect shape & function of enzymes: Temperature, pH, salinity (ion concentration)

Multiple Choice

• A

• B

• C

• D

Multiple Choice

Based on the graph, what temperature does this enzyme work best? 

• 15 C
• 40 C
• 30 C
• 47 C

Multiple Choice

Letter D...

• active site
• enzyme
• substrate
• products

Multiple Choice

Letter B...

• active site
• enzyme
• substrate
• products

Multiple Choice

Letter C...

• active site
• enzymes
• substrate
• products

Multiple Choice

Letter E...

• active site
• enzyme
• substrate
• products

Labelling

Label the parts of the enzyme model

Drag labels to their correct position on the image

Products

Substrate

Active site

Enzyme

Multiple Choice

Enzymes are an example of

• Lipids

• Carbohydrate

• Protein

• Nucleic Acid

Multiple Choice

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

• reusable
• catalyst
• specific
• fragile

Multiple Choice

An enzyme speeds up a reaction by

• lowering the activation energy.
• raising the activation energy.
• releasing energy.
• absorbing energy.