Active Site Flashcards Preview

Enzymes > Active Site > Flashcards

Flashcards in Active Site Deck (11)
Loading flashcards...
1
Q

What is the active site of an enzyme?

A

The region into which the substrate fits.

2
Q

What is special about the shape of the active site?

A

Active site shape is complementary to shape of substrate.

Charges are also complementary

3
Q

What is the name for when an enzyme and subsrate bind together?

A

Enzyme-substrate complex

4
Q

What is the original theory of enzyme action?

A

Lock and Key model

5
Q

What does the Lock and Key Model say?

A

Active site is the Lock.
Substrate is the key
Both active site and subsrate are fixed in shape

6
Q

What is the new theory for enzyme action?

A

Induced Fit

7
Q

What does the Induced Fit Hypothesis say?

A

Active site changes shape slightly to fit around substrate.

Analogy of hand and a glove

8
Q

What is the first stage in an enzyme catalysed reaction?

A

Substrate fits into active site.

Enzyme-substrate complex formed.

9
Q

What is the second stage in an enzyme catalysed reaction?

A

Active site changes shape to convert substrate into products.
Forms enzyme-product complex.

10
Q

What is the third stage in an enzyme catalysed reaction?

A

Products no longer for active site.

Products are released.

11
Q

What is the final stage in an enzyme catalysed reaction?

A

Active site is now free for another substrate molecule.