Enzymes Quiz

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Enzymes basics

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Diana Rivadeneira

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Froggy Jumps Enzymes QuizVersión en línea Enzymes basics por Diana Rivadeneira 1 What is the region of an enzyme where the substrate binds called? a Active site b Allosteric site c Catalytic pocket 2 Enzymes speed up reactions by lowering which energy barrier? a Activation energy b Gibbs energy c Kinetic energy 3 If temperature rises above an enzyme's optimum, what happens? a No effect on structure b Enzyme denaturation reduces activity c Activity increases 4 What are non-protein helpers required by some enzymes called? a Inhibitors b Substrates c Cofactors 5 What does the lock-and-key model propose about enzyme-substrate fit? a Substrate fits the active site exactly like a key fits a lock b Active site is flexible to any molecule c Enzymes change shape first to fit substrates 6 What does a competitive inhibitor do? a Binds to the active site, blocking substrate access b Increases enzyme turnover rate c Binds to a distant site to change shape 7 Most enzyme activity is pH-dependent; what happens if pH is far from the optimum? a No change in activity b Activity increases c Enzyme activity decreases 8 If substrate is abundant and enzyme concentration increases, what happens to reaction rate? a Rate increases until substrate becomes limiting b Rate stays the same c Rate decreases 9 Which enzyme specifically digests starch into maltose? a Amylase b Lipase c Protease 10 What happens to an enzyme when it loses its 3D structure due to heat or pH? a Denaturation and loss of function b Polymerization c Hydrolysis and activation

Froggy Jumps

Enzymes QuizVersión en línea

Enzymes basics

por Diana Rivadeneira

What is the region of an enzyme where the substrate binds called?

Active site

Allosteric site

Catalytic pocket

Enzymes speed up reactions by lowering which energy barrier?

Activation energy

Gibbs energy

Kinetic energy

If temperature rises above an enzyme's optimum, what happens?

No effect on structure

Enzyme denaturation reduces activity

Activity increases

What are non-protein helpers required by some enzymes called?

Inhibitors

Substrates

Cofactors

What does the lock-and-key model propose about enzyme-substrate fit?

Substrate fits the active site exactly like a key fits a lock

Active site is flexible to any molecule

Enzymes change shape first to fit substrates

What does a competitive inhibitor do?

Binds to the active site, blocking substrate access

Increases enzyme turnover rate

Binds to a distant site to change shape

Most enzyme activity is pH-dependent; what happens if pH is far from the optimum?

No change in activity

Activity increases

Enzyme activity decreases

If substrate is abundant and enzyme concentration increases, what happens to reaction rate?

Rate increases until substrate becomes limiting

Rate stays the same

Rate decreases

Which enzyme specifically digests starch into maltose?

Amylase

Lipase

Protease

What happens to an enzyme when it loses its 3D structure due to heat or pH?

Denaturation and loss of function

Polymerization

Hydrolysis and activation

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Enzymes Quiz

Froggy Jumps

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Creada por

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Enzymes QuizVersión en línea

por Diana Rivadeneira

What is the region of an enzyme where the substrate binds called?

Enzymes speed up reactions by lowering which energy barrier?

If temperature rises above an enzyme's optimum, what happens?

What are non-protein helpers required by some enzymes called?

What does the lock-and-key model propose about enzyme-substrate fit?

What does a competitive inhibitor do?

Most enzyme activity is pH-dependent; what happens if pH is far from the optimum?

If substrate is abundant and enzyme concentration increases, what happens to reaction rate?

Which enzyme specifically digests starch into maltose?

What happens to an enzyme when it loses its 3D structure due to heat or pH?