Enzymes Q Flashcards

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1
Q

Explain how the shape of an enzyme molecule is related to its function

A
  • specific 3D tertiary structure
  • specific complementary shape
  • substrate can bind to active site
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2
Q

An enzyme catalyses only one reaction. Explain why

A
  • enzyme has active site

- only 1 substrate fits the active site

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3
Q

Describe the induced-fit model of enzyme action

A
  • before reaction, active site not complementary to substrate
  • shape of active site changes as substrate binds as E-S complex forms
  • bending bonds in substrate leading to reaction
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4
Q

Explain how enzyme models have changed over time

A

1 - lock and key, 1 enzyme, 1 substrate

2 - induced fit - 1 enzyme, multiple substrates, more flexible, active site moules

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5
Q

Compare 2 models fo enzyme action

A

Lock and key - active site rigid, active site an exact fit with substrate, substrate binds to active site and enzymes break bonds (catabolic)

Induced fit - active site rigid, active site moulds around substrate, binding of substrate to active site causes change

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6
Q

Give an example of an intracellular process and how it could effect a cell

A

Respiration - ATP production

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7
Q

Give an example of an intracellular process and how it could effect a whole organism

A

Protein synthesis - link to cell cycle, mitosis and growth

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8
Q

Give an example of an extracellular process and how it could effect a cell

A

Digestion - hydrolysis of large insoluble molecules into small soluble molecules so they can be absorbed

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9
Q

Give an example of an extracellular process and how it could effect a whole organism

A

Blood clotting process

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