Topic 1A - Biological Molecules

Question 1

What are polymers?

Answer 1

Large, complex molecules composed of long chains of monomers joined together.

Question 2

What are monomers?

Answer 2

Smaller, repeating units of a polymer.

Question 3

How does trexall slow cell division? It binds with the enzyme DR which is supposed to bind with folic acid, and this produces nucleotides (3)

Answer 3

Trexall is a competitive inhibitor. Less folic acid attaches to enzyme/ fewer enzyme-substrate complexes. Not enough nucleotides available for DNA replication.

Question 4

What is the role of the disulfide bridge in forming the quaternary structure of an antibody?

Answer 4

Joins two different polypeptides.

Question 5

What does starch break down into?

Answer 5

Maltose, not glucose idk why.

Question 6

What are carbohydrates?

Answer 6

All carbohydrates contain CHO.
Monomers are monosaccharides.
Alpha and beta glucose are isomers. Draw the structures.