Unit 3 (Take Home Exam)

Front

What is the primary role of enzymes in biological reactions?

Back

Enzymes lower the activation energy required for biological reactions to occur, facilitating faster reaction rates.

Front

What is included in the structure of enzymes that specifically interacts with substrate molecules?

Back

The active site is the region on an enzyme where substrate molecules bind and undergo a chemical reaction.

Front

What effect does a lack of energy have on enzyme and substrate collisions at suboptimal temperatures?

Back

A lack of energy decreases the amount of collisions between enzymes and substrates, reducing reaction rates.

Front

What is one of the outputs of the light-dependent reactions in photosynthesis?

Back

Oxygen (O2) is produced as a byproduct of the light-dependent reactions.

Front

For an enzyme-mediated chemical reaction to occur, what must be compatible with the active site of the enzyme?

Back

The shape and charge of the substrate must be compatible with the active site of the enzyme for binding to occur.

Front

Define enzymes.

Back

Enzymes are biological catalysts that speed up chemical reactions in living organisms by lowering the activation energy.

Front

What factors can affect enzyme activity?

Back

Factors include temperature, pH, substrate concentration, and the presence of inhibitors or activators.

Front

Explain the concept of activation energy.

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What is the significance of the active site in enzyme function?

Back

The active site is crucial for enzyme specificity, allowing only certain substrates to bind and undergo a reaction.

Front

How do temperature changes affect enzyme activity?

Back

Increased temperature can enhance enzyme activity up to a certain point, after which the enzyme may denature and lose function.