B.11B Enzymes

The diagram represents one way an enzyme can be inhibited.

Which statement explains the effect of an inhibitor on an enzyme?

• A substrate will be able to bond with the enzyme.

• The enzyme will likely be attacked by immune cells.

• The enzyme will be unable to produce more enzymes.

• A substrate will be unable to attach to the enzyme.

The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, the enzyme functions best at what temperature and pH?

• temperature of 27 degrees C and pH of 4

• temperature of 37 degrees C and pH of 6

• temperature of 40 degrees C and pH of 8

• temperature of 50 degrees C and pH of 10

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

• puncture

• denature

• double

• delete

Place the labels were they belong on the following picture

b

c

d

e

a

Active site

product

Enzyme-substrate complex

Reactant

Enzyme

Which model best represents the molecules at the end of the reaction

• 
• 
• 
• 

Tags

NGSS.HS-LS1-7

An enzyme speeds up a reaction by

• lowering the activation energy.

• raising the activation energy.

• releasing energy.

• absorbing energy.

The optimal pH for Trypsin is:

• 1.5

• 5

• 7.3

• 8.2

Tags

NGSS.HS-PS1-6

The optimal pH for Pepsin is:

• 1.5

• 5

• 7.3

• 8.2

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

Enzymes are ​ (a)   that ​ (b)   chemical reactions by​ (c)   the amount of activation energy required to start the reaction.

• proteins
• speed-up
• decreasing
• carbohydrates
• increasing
• slow-down