IB Biology Topic 2.5 Review

In an enzyme-catalyzed reaction, the _____ binds to the _____ .

• Substance, enzyme

• Substrate, enzyme

• Substrate, active site

• Substrate, allosteric site

An increase in which of these factors will guarantee an increase in enzyme activity?

• Temperature

• pH

• Substrate concentration

• Amount of enzyme present

With relation to enzyme and substrate, what does the term "successful collision" mean?

• When the substrate bumps into the active site and sticks to it.

• When a product is formed

• When the substrate bumps into the active site

• When the substrate bumps into the enzyme

This graph represents enzyme activity with relation to which factor?

• Temperature

• pH

• Substrate concentration

Tags

NGSS.HS-PS1-5

This graph represents enzyme activity with relation to which factor?

• Temperature

• pH

• Substrate concentration

This graph represents enzyme activity with relation to which factor?

• Temperature

• pH

• Substrate concentration

How would you expect the optimum pH of enzymes to vary between the stomach and acidic hot springs?

• The optimum pH would be roughly the same.

• The optimum pH in acidic hot springs would be much lower than the stomach

• The optimum pH in acidic hot springs would be much larger than the stomach

• Depends on the enzyme.

How would you expect the optimum pH of enzymes to vary between the stomach and alkaline lakes?

• The optimum pH would be roughly the same.

• The optimum pH in alkaline lakes would be much lower than the stomach

• The optimum pH in alkaline lakes would be much larger than the stomach

• Depends on the enzyme.

Catalase is an enzyme produced in the liver. It decomposes hydrogen peroxide into water and oxygen gas. Where would you expect its optimum temperature to be?

• $0\degree C$

• $40\degree C$

• $100\degree C$

• It has no optimum temperature since the higher the temperature, the more collisions.

Tags

NGSS.HS-PS1-5

Describe the advantages of enzyme immobilization.