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Enzymes > Enzymes > Flashcards

Enzymes Flashcards

1
Q

Structure and function of enzymes diagram

A

See slide

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2
Q

The active site

What kind of hollow or cleft is in the enzyme surface?

A

Hydrophobic

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3
Q

What does the active site accept?

A

Reactants (substrates and cofactors)

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4
Q

What do the amino acids do which the active site contains? (2)

A

1 bind reactants (substrates and cofactors)

2 participate in the enzyme-catalysed reaction

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5
Q

What do the amino acids do which the active site contains? (2)

A

1 bind reactants (substrates and cofactors)

2 participate in the enzyme-catalysed reaction

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6
Q 
Substrate binding
Bonding forces (3)
A

1 ionic (strongest bonding)
2 hydrogen
3 Vann Der Walls

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7
Q

Binding of pyruvic acid in LDH diagram

A

See slide

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8
Q

Possible interactions in the binding of pyruvic acid in LDH

A

1 H-bond
2 van der walls
3 ionic

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9
Q

Binding forces in substrate binding

What is induced fit?

A

Active site alters shape to maximize intermolecular bonding

See diagram

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10
Q

Catalysis mechanisms

Mechanism for chromotrypsin

A

See diagram

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11
Q

Regulation of enzymes

How are many enzymes regulated within the cell?

A

By agents

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12
Q

Regulation may _____ or _____ the enzyme

A

Enhance or inhibit

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13
Q

Products of some enzyme-catalysed reactions may act as

A

Inhibitors

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14
Q

Enzymes usually bind to a binding site called the

A

Allosteric binding site

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15
Q

Regulation of enzymes diagram

Allosteric binding site

A

See slide

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16
Q

How does the inhibitor bind to an allosteric binding site

A

Reversibly

17
Q

What type of bonds are formed at an allosteric binding site?

A

Intermolecular bonds

18
Q

What alters the shape of the enzyme at an allosteric binding site?

A

Induced fit

19
Q

What is distorted and not recognised by the substrate in allosteric binding?

A

Active site

Enzymes (1 decks)

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