AP: Unit 3.1-5 Review Questions

Front

What is an allosteric inhibitor?

Back

An allosteric inhibitor binds to an enzyme away from the active site, changing the conformation of the active site and decreasing its affinity for the substrate.

Front

How does pH affect enzyme activity?

Back

Enzyme activity can vary with pH; for example, peroxidase activity is likely to be lower at pH 11 compared to pH 9.

Front

What role do plastoquinone (PQ) and plastocyanine (PC) play in photosynthesis?

Back

Plastoquinone (PQ) and plastocyanine (PC) facilitate the movement of electrons down the electron transport chain into Photosystem I.

Front

How does the loss of CO₂ affect photosynthesis?

Back

Loss of CO₂ will affect photosynthesis as the Calvin cycle may slow down or stop due to inadequate carbon for fixation.

Front

What molecule must enter the Calvin cycle continuously?

Back

CO₂ must enter the Calvin cycle continuously for the reactions to take place.

Front

Define the Calvin cycle.

Back

The Calvin cycle is a series of biochemical reactions in photosynthesis that convert carbon dioxide and other compounds into glucose.

Front

What is the function of Rubisco in photosynthesis?

Back

Rubisco is an enzyme that catalyzes the first step of the Calvin cycle, fixing carbon dioxide into an organic molecule.

Front

Explain the significance of enzyme conformation.

Back

Enzyme conformation is crucial because it determines the enzyme's activity and its ability to bind substrates.

Front

What happens to enzyme activity at extreme pH levels?

Back

Extreme pH levels can denature enzymes, leading to a loss of activity.

Front

Describe the electron transport chain in photosynthesis.

Back

The electron transport chain in photosynthesis involves a series of proteins that transfer electrons, ultimately leading to the production of ATP and NADPH.