AP Biology: Unit 3 Review (CED)

Front

What effect does an increase in temperature have on the rate of a chemical reaction?

Back

An increase in temperature increases the speed/kinetic energy of particles, leading to more frequent collisions and a higher reaction rate.

Front

What is the pathway of electrons in the light reactions of photosynthesis?

Back

H₂O → PSII → ETC → PSI → NADPH

Front

Where does the substrate bind on an enzyme?

Back

The substrate binds at the active site of the enzyme.

Front

Where does the electron transport chain occur?

Back

The electron transport chain occurs in chloroplasts, prokaryotic plasma membranes, and mitochondria.

Front

What is the effect on free energy when the amount of enzyme is doubled?

Back

Doubling the amount of enzyme has no effect on free energy.

Front

What is the role of enzymes in biochemical reactions?

Back

Enzymes act as catalysts to speed up biochemical reactions by lowering the activation energy.

Front

Define 'active site' in the context of enzymes.

Back

The active site is the specific region on an enzyme where the substrate binds and the reaction occurs.

Front

What is the function of the electron transport chain in cellular respiration?

Back

The electron transport chain transfers electrons through a series of proteins, ultimately producing ATP and water.

Front

Explain the significance of NADPH in photosynthesis.

Back

NADPH is a reducing agent that provides the electrons needed for the conversion of carbon dioxide into glucose during the Calvin cycle.

Front

What is the difference between competitive and non-competitive inhibition?

Back

Competitive inhibition occurs when an inhibitor competes with the substrate for the active site, while non-competitive inhibition occurs when an inhibitor binds to an allosteric site, changing the enzyme's shape.