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Bio 1610 Pittilleri > Enzymes > Flashcards

Flashcards in Enzymes Deck (11):
1

Enzymes

Proteins
-catalysts
-lower Energy of Activation
-speed up reactions
-have the right shape and charge to bind with molecules at the active sight
-help facilitate getting substrates together
-it will break bonds in the substrates (change shape) to bring them together. Then the enzymes will go back to the way it was.
-are needed for chemical reactions to take place.

2

Properties of Enzymes

-speed up reactions
-only reactions that could happen anyways
-they are not used up or changed
-very specific (designed for reactants needed for 1 reaction)
-work the reaction in both directions

3

Factors Affecting Enzymes

-Temperature
-pH
--they do not regulate enzyme function. They are just factors that can affect enzymes.

4

How does Temperature affect Enzymes?

-Higher temp. faster reactions occur
-If temp is to high they will denature (loss shape and function)

5

How does pH affect Enzymes?

-All enzymes have a certain pH range they will work at
-If the pH is to high or low they will slow down or not work at all.

6

Regulation of Enzymes

1. The amount of substrate (reactants)
2.The amount of Enzyme
3. Feedback inhibition
4. Competitive Inhibition
5. Allosteric Regulation
6. Inactive Forms

7

Feedback Inhibition

-The product binds to the Enzyme
-Some product feeds back and turns off or inhibits the Enzyme.

8

Competitive Inhibition

-Something binds to an active sight and stops that reaction from happening.

9

Allosteric Regulation

Co-factors/ Co-enzymes
-effect the shape/function
-can speed up or slow down or stop the enzyme
-they don't bind to the active sight
-vitamins and minerals are and example of them

10

Inactive Forms

Must come into contact with things that activate them
-Digestive enzymes
--inactive until activated

11

Catalyst

Helps chemical reactions take place