Unit 1 Comprehension Review

Which factors can influence enzyme activity?

• Temperature, pH, and substrate concentration

• Pressure, color, and volume

• Light intensity, time, and humidity

• pH, color, and pressure

Why do enzymes exhibit specificity towards their substrates?

• Due to the unique shape of their active site.

• Because they are made of proteins.

• As a result of their size.

• Through their interaction with water molecules.

How do temperature and pH ranges affect the optimal function of enzymes?

Tags

NGSS.HS-PS1-5

What is the main function of enzymes in living organisms?

• To slow down chemical reactions

• To speed up chemical reactions

• To store energy

• To provide structure to cells

When the temperature is (a) and the pH is (b), the enzyme is the MOST active.

• 40, 10

• 10, 4

• 37.5, 7

• 30, 8

What color are acids and what is their pH range?

• Blue and 8-14

• Green and 7

• Red and 0-6

• Yellow and 15-20

What does movement to the left of 7 on the pH scale indicate?

• An increase in concentration

• A decrease in concentration

• No change in concentration

• An unknown change in concentration

Tags

NGSS.HS-PS1-5

If a neutral substance is contaminated with hydroxide ions, it is most likely which of the following?

• An acid turning into an acid.

• A base turning into a base.

• A neutral substance turning into an acid.

• A neutral substance turning into a base.

What happens to a cell in a hypertonic solution?

• It swells

• It shrinks

• It remains the same size

• It bursts

What is the main difference between active and passive cell transport?

• Active transport requires energy for larger molecules, while passive transport involves diffusion of water particles.

• Active transport involves diffusion of water particles, while passive transport requires energy for larger molecules.

• Active transport and passive transport both require energy for larger molecules.

• Active transport and passive transport both involve diffusion of water particles.