enzymes Flashcards

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1
Q

2 models for enzyme theory

A

lock and key
induced fit ( modern idea)

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2
Q

what determines an enzymes shape

A

the globular tertiary structure of the protein

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3
Q

process of enzyme action

A

substrate and active site complementary
they bind to form an enzyme-substrate complex
products are released

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4
Q

role of an enzyme

A

biological catalyst

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5
Q

factors affecting enzyme activity

A

concentration (substrate/enzyme)
temperature
pH

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6
Q

what happens when an enzyme denatures

A

the tertiary structures changes the 3D shape
this means the active site shape is changed so is no longer complementary
no enzyme-substrate complex can form
no reaction can be catalysed

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7
Q

effect of temperature enzymes

A

more kinetic energy, increased force of collision so increased enzyme activity

until denaturation

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8
Q

effect of pH on enzymes

A

H+ ions disrupt hydrogen and ionic bonds in a molecule which results in denaturation

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