1.4 - Proteins

Question 1

Structural proteins

Answer 1

Hold tissues together e.g. collagen

Question 2

The sequence of amino acids

Answer 2

Controls the shape and function of proteins

Question 3

Hormones

Answer 3

Are chemical messengers which carry a message from a gland to a receptor via the blood

Question 4

Receptors

Answer 4

Bind to a hormone and tell the target cell what to do.

Question 4

Antibodies

Answer 4

Are proteins, made by white blood cells, which destroy pathogens

Question 5

Enzymes

Answer 5

Are biological catalysts e.g. amylase and are made by all living cells

Question 6

Biological catalysts

Answer 6

Speed up chemical reactions in cells and remain unchanged in the process

Question 7

Active site

Answer 7

Where the substrate fits into the enzyme and is a complementary shape to it

Question 8

Substrate

Answer 8

The reactant(s) in a reaction, and is specific to an enzyme

Question 9

Product

Answer 9

The molecule(s) made by an enzyme-controlled reaction

Question 10

Optimum conditions

Answer 10

Are the temperature and pH which the enzymes are most active

Question 11

Denatured

Answer 11

When the active site changes shape and affects the rate of the reaction

Question 12

An example of a degradation reaction is

Answer 12

Starch ——amylase—-→ maltose

Question 13

An example of a synthesis reaction is

Answer 13

G-1-P —–phosphorylase—–→ starch