catalysts and enzymes

Question 1

A catalyst is a substance that ____ up the rate of chemical ______ but itself is not changed by the reaction.

Answer 1

> speeds
reactions

Question 2

What are the 2 main roles of enzyme action in the body?

Answer 2

> break down large molecules into smaller ones
building up large molecules from several smaller ones

Question 3

protein synthesis occurs in the cytoplasm
enzymes are made of protein
proteins are long molecules of amino acids

Answer 3

false - it occurs in ribosomes
true
true

Question 4

What is the lock and key hypothesis?

Answer 4

It states that the active site must be complementary to the shape of the substrate molecules.