Unit 3 AP Bio REVIEW

Enzymes ___________________ activation energy to speed up chemical reactions.

• increase

• decrease

Tags

NGSS.HS-PS1-5

How does the active site of an enzyme determine the substrate for that enzyme?

• The active site has the right polarity to interact with the substrate.

• The active site is hydrophobic and interacts with other hydrophobic amino acids on the substrate

• The active site has a specific shape that fits the shape of the substrate

• The active site uses energy to form covalent bonds with the substrate

How does a competitive inhibitor affect an enzymes function?

• It binds to an allosteric site that alters the shape of the enzyme

• It changes the polarity of the enzyme, decreasing the rate of reaction

• It denatures the enzyme which increases the activation energy for the reaction.

• It binds to the active site, preventing the enzyme from catalyzing the reaction

Which of these factors can affect the initial rate of an enzyme reaction?

• Enzyme concentration

• Substrate concentration

• Temperature

• pH

• All of the above

Based on this graph, which enzyme would function best in a basic environment?

• A

• B

Why is the hydrolysis of ATP important to a cells function?

• It provides a source of phosphate for the cell.

• It releases energy that can be used to power cellular processes

• It absorbs excess hydrogen ions in the cell to regulate the internal pH

• It acts as a catalyst for chemical reactions in the cell.

Tags

NGSS.HS-LS2-5

How does a plant obtain the carbon necessary to form glucose?

• Through the light reactions

• From stored sugars in the roots of the plant

• From the catabolic breakdown of water

• Through CO₂ absorbed from the atmosphere

Tags

NGSS.HS-LS2-5

What are the products of the light reaction directly needed by the Calvin cycle in photosynthesis?

• H ions and carbon dioxide

• Photons absorbed by chlorophyll

• FADH₂ and Oxygen

• ATP and NADPH

What are the products of the Krebs Cycle?

• Pyruvate, water, ATP, NADH

• Acetyl CoA, NADH

• NADH, FADH_2, carbon dioxide, ATP

• ATP, glucose

Tags

NGSS.HS-LS1-7

What are the products of glycolysis?

• Pyruvate, ATP, water, NADH

• Carbon dioxide, FADH₂, NADH, ATP

• 32 ATP

• NADPH and ATP