What is the role of activation energy in a chemical reaction?

It is the energy required to initiate a reaction

According to collision theory, what must molecules do to react?

Collide with enough kinetic energy

In a biochemical pathway, what role does an enzyme play?

It catalyzes a substrate into a product

What is a biochemical pathway?

A series of enzyme-catalyzed reactions where the product of one reaction becomes the substrate of the next

Fill in the blanks: Enzymes are catalysts that have an ________ where a substrate binds. They function to ________ the activation energy of reactions in order to ________ the reaction rate. Following a reaction, an enzyme ________ go on to catalyse further reactions.

active site, lower, increase, can

What happens to an enzyme when the temperature exceeds its optimal level?

The enzyme denatures and loses its function.

What happens to enzyme activity when the temperature is below the optimal level?

Enzyme activity decreases and they may freeze.

What happens to enzyme activity as temperature increases towards the optimal point?

More enzyme-substrate complexes form.

What occurs when the temperature decreases towards the lower limit of the tolerance range for enzymes?

Enzyme activity slows until freezing occurs.

What happens when temperature exceeds the enzyme's tolerance range?

Enzyme activity drops steeply until denaturation.

What is the effect of pH on enzyme activity?

Enzymes can denature if the pH is too acidic or basic.

What is the saturation point in enzyme activity?

The point where enzymes are saturated with substrate and cannot increase reaction rate.

What happens to the rate of reaction when the substrate concentration reaches the saturation point?

It remains constant, resulting in a plateau.

How does increasing enzyme concentration affect the reaction rate?

It increases the reaction rate due to more frequent collisions with substrates.

What is the role of a competitive inhibitor in enzyme activity?

It blocks the active site, preventing substrate binding.

What is true about non-competitive inhibitors?

They induce a conformational change in the enzyme.

In the context of enzyme inhibition, what does the term "competitive" refer to?

The inhibitor and substrate compete for the active site.

Non-competitive inhibition

Inhibition where the inhibitor binds to an allosteric site

How do reversible inhibitors affect enzyme activity?

They slow down enzyme activity temporarily

What is a characteristic of irreversible inhibition?

Strong bonds that cannot be broken

What role do enzyme inhibitors play in biochemical pathways?

They regulate the amount of product created

What is the role of coenzymes in enzymatic reactions?

They assist enzymes by donating energy or molecules.

What happens to a coenzyme after it participates in a reaction?

It leaves the enzyme and is recycled for further reactions.

How do competitive inhibitors affect enzyme activity?

They bind to the enzyme's active site

What is the role of coenzymes in enzyme function?

They assist enzyme functioning and must be recycled

Enzymes can be denatured by

high and low temperatures and pH values.

Enzymes in Biochemical Pathways Flashcards

Student preview

48 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What role do enzymes play in biochemical pathways?

Back

They serve as catalysts.

2.

FLASHCARD QUESTION

Front

Factors impacting enzyme function in photosynthesis and cellular respiration:

Light intensity and humidity
Temperature, pH, and concentration
Wind speed and soil type
Altitude and pressure

Back

Temperature, pH, and concentration

3.

FLASHCARD QUESTION

Front

What is the role of enzymes and coenzymes in photosynthesis and cellular respiration?

Back

They facilitate steps in the processes.

4.

FLASHCARD QUESTION

Front

What is the primary role of enzymes in biochemical reactions?

Back

Lower the activation energy required

5.

FLASHCARD QUESTION

Front

What are enzymes primarily made of?

Back

Proteins

6.

FLASHCARD QUESTION

Front

What is the role of enzymes in chemical reactions?

Back

They speed up reactions

7.

FLASHCARD QUESTION

Front

What is the term for the molecule that an enzyme binds to?

Back

Substrate

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