1.2-Enzyme Activity and Function

Which characteristic defines an enzyme's primary functional uniqueness?

• Ability to change shape
• Substrate specificity
• Protein composition
• Reaction speed

What happens to enzyme activity when temperature increases beyond its optimal point?

• Activity continues to increase
• Activity remains constant
• Enzyme begins to denature
• Substrate concentration increases

Why are enzymes considered reusable biological catalysts?

• They are consumed in reactions
• They remain unchanged after reactions
• They permanently bond to substrates
• They generate new chemical compounds

In the enzyme-substrate complex, what primary function does the enzyme serve?

• Consuming substrate molecules
• Lowering activation energy
• Permanently altering substrate structure
• Increasing reaction temperature

What process describes an enzyme losing its functional shape?

• Catalysis
• Denaturation
• Substrate binding
• Activation

Which enzyme breaks down hydrogen peroxide into water and oxygen?

• Amylase
• Lactase
• Catalase
• Lipase

How does substrate concentration initially affect enzyme reaction rates?

• Decreases reaction speed
• Has no effect
• Increases reaction speed
• Randomly fluctuates

What structural characteristic is crucial for enzyme functionality?

• Molecular weight
• Protein structure
• Electrical charge
• Atomic composition

Which environmental factor can significantly impact enzyme activity?

• Magnetic fields
• Sound waves
• pH levels
• Gravitational force

What happens when an enzyme encounters a non-compatible substrate?

• Reaction occurs normally
• Enzyme becomes permanently damaged
• No reaction takes place
• Substrate is forcibly modified