AP Bio Unit 3 Test Review

The first law of thermodynamics states that energy is constant and cannot be created nor destroyed but it can be ___________ to a different form.

Tags

NGSS.HS-PS3-2

Which of the following best describes the specificity of interaction between a substrate and an enzyme?

• The available energy of reactants is greater than the available energy of the product.

• The interaction between an enzyme and a substrate is dependent on environmental conditions.

• The shape and charge of the substrates are compatible with the active site of the enzyme.

• The enzyme undergoes a conformation change during the interaction, but the substrate does not.

A charged battery sitting in it's package is an example of ​ ​ (a)   energy.

• potential
• kinetic

Which of the below choices is a good explanation of the impact of substrate concentration in enzyme-mediated chemical reactions?

• The enzyme becomes denatured as the substrate concentration increases.

• The active site of the enzyme can only bind a single substrate at a time.

• The enzyme begins converting the product into the substrate as the substrate concentration increases.

• The substrate-binding specificity of the enzyme decreases as the concentration of substrate increases.

Which of the following explains how enzymes catalyze a reaction?

• The binding of the substrate to the active site of an enzyme stabilizes it in its transition state, which decreases the activation energy of the reaction.

• The binding of the substrate to the active site of an enzyme stabilizes both the reactant and the product, which increases the overall energy transfer in the reaction.

• The binding of the substrate to the active site of an enzyme stabilizes the reactant, which decreases the free-energy change of the reaction.

• The binding of the substrate to the active site of an enzyme stabilizes the product, which increases the amount of energy released by the reaction.

Pepsin, amylase, and trypsin are enzymes involved in digestion. What is the graph depicting in regard to enzyme activity and pH?

• Enzymes can lose effectiveness when the pH of their environment changes.

• Enzymes work independently of pH.

• pH can change the shape of substrate allowing for decreased reaction rates.

• A neutral pH is the most effective for enzyme activity.

Pepsin, amylase, and trypsin are enzymes involved in digestion. What is the optimal pH for amylase?

• 2

• 7

• 9

• 12

Tags

NGSS.MS-PS1-2

What is the correct equation for photosynthesis?

• 6CO2 + 6H2O + heat energy → C6H12O6 + 6O2
• 6CO2 + 6H2O + ATP → C6H12O6 + 6O2
• 6CO2 + 6H2O + light energy → C6H12O6 + 6O2
• 6CO2 + 6H2O + glucose → C6H12O6 + 6O2

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Label the structures of a chloroplast.

a

b

c

granum

stroma

thylakoid

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What happens in the light-dependent reaction of photosynthesis?

• Light energy is absorbed by chlorophyll and used to convert carbon dioxide into glucose.
• Light energy is absorbed by chlorophyll and used to convert oxygen into water.
• Light energy is absorbed by chlorophyll and used to convert glucose into carbon dioxide.
• Light energy is absorbed by chlorophyll and used to convert water into ATP/NADPH.

Tags

NGSS.HS-LS1-5