B3b-proteins And Mutations Flashcards Preview

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Flashcards in B3b-proteins And Mutations Deck (17)
1

What are proteins made of?

Long chains of amino acids

2

What are structural proteins?

Physically strong
Eg
Collagen
Strengthens connective tissues

3

What are hormones?

Proteins
Carry messages around the body
Eg
Insulin

4

What are carrier molecules?

Transport smaller molecules
Eg
Haemoglobin

5

What are enzymes?

Control cell reactions
Proteins

6

How are proteins made?

-amino acids coded for by a sequence of three bases in gene
-amino acids put together make a protein

7

What is a biological catalyst?

Substance that speeds up a reaction

8

What do enzymes do?

-catalyse chemical reactions in living cells (respiration,photosynthesis)

9

How do enzymes have a high specificity for their substrate?

They usually only work with one substrate

10

What is the lock and key mechanism?

-substrate fits into active site of enzyme
-reaction catalysed
-enzyme unchanged after reaction

11

How do temperatures affect enzyme activity?

-low temperatures : lower collision rate, slower reaction
-high temperatures: enzymes and substrate have more energy, higher collision rate

12

Why do enzymes have an optimum temperature?

-If its too hot bonds golding enzymes will break
-enzymes denature

13

How does pH affect enzymes?

If its too high or low it interferes with bonds holding the enzyme together
Denatures it

14

What are sone examples of proteins?

Collagen
Insulin
Haemoglobin

15

What is Q10?

Shows how rate of reaction changes temperature

16

What is the equation for Q10?

Q10 = rate at higher temperature / rate at lower temperature

17

How does a mutation alter the production of a protein?

-mutation change in DNA base sequence
-mutation could stop the production of the protein the gene normally codes for
Or produce a different protein