Enzymes and Factors affecting Enzymes

When an enzyme tightens around a substrate, this is called:

• An awkward hug

• Induced fit

• Competitive Inhibition

• Non competitive Inhibition

What happens to enzyme activity when temperatures are too low?

• It decreases because enzymes are denatured

• It decreases because there is too little kinetic energy for enzymes to catalyse the reaction

• It increases because enzymes are not sensitive to temperature

• It increases because all enzymes need low temperatures to work properly

Which color line represent a reaction with an enzyme present?

• Blue

• Red

• Both

• Neither

How does denaturation affect enzyme activity?

• Denaturation has no effect on enzyme activity

• Denaturation increases enzyme activity

• Denaturation decreases enzyme activity

• Denaturation results in the loss of enzyme structure and function, leading to decreased enzyme activity

Which letter represents the Product ?

• B

• C

• D

• E

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

• puncture

• denature

• double

• delete

The energy needed to start a reaction is called the

• activation energy

• starting energy

• promoting energy

• reacting energy

An enzyme speeds up a reaction by

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

The place, other than the active site, where activators and inhibitors bind to an enzyme is called the ________ site.

• competitive
• allosteric
• alterior
• rate

What is the optimal pH for this enzyme?

• 6

• 10

• 9

• 7