AP Biology Cell Energetics

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

What effect does high temperature have on most enzymes reaction rates?

• High temperatures will speed up the enzyme's reaction rate

• High temperatures will stabilize the enzyme's reaction rate

• High temperatures will decrease enzyme reaction rates due to denaturation

• High temperatures do not affect enzyme reaction rates

What factors affect the rate of photosynthesis?

• CO₂ concentration

• H₂O available

• Temperature

• Light intensity

• All of the above

What powers the rotation of ATP synthase enzymes in mitochondria and chloroplasts?

• The energy absorbed during the light reactions.

• The electronegativity of oxygen

• Energy released by breaking the chemical bonds in glucose

• The diffusion of hydrogen

Tags

NGSS.HS-LS2-3

What are the products of glycolysis?

• Pyruvate, ATP, water, NADH

• Carbon dioxide, FADH₂, NADH, ATP

• 32 ATP

• NADPH and ATP

Tags

NGSS.HS-LS1-7

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

• A

• B

Where does the Calvin cycle take place?

• Cytosol

• Thylakoid membrane

• Stroma

• Mitochondrial matrix

Where does the Krebs Cycle take place?

• Cytosol

• Mitochondrial matrix

• Mitochondrial cristae

• Stroma

• Thylakoid membrane

Tags

NGSS.HS-LS1-7

What is the main function of oxidative phosphorylation?

• To complete the breakdown of glucose

• To generate a proton gradient and synthesize ATP

• To split a glucose molecule in half and synthesize NADH

Tags

NGSS.HS-LS1-7