Proteins

Question 1

What are proteins made up of?

Answer 1

Amino acids

Question 2

What 3 components make up amino acids?

Answer 2

Amino group, carboxyl group and R group

Question 3

What’s the reaction and bonds called when water is removed from amino acids?

Answer 3

Condensation reaction
Peptide bonds

Question 4

What’s the difference between dipeptides and polypeptides?

Answer 4

Dipeptides > 2 amino acids
Polypeptided > 3 or more amino acids

Question 5

What is the primary structure?

Answer 5

Sequence of amino acids in a protein

Question 6

What is the secondary structure?

Answer 6

Chain of amino acids (2D)

Question 7

What is the tertiary structure?

Answer 7

3D folding of secondary structure into complex shape. Shape dependant on bonds.

Question 8

What is the Quaternary structure?

Answer 8

3D arrangement of polypeptides

Question 9

What are the 4 structures of a protein?

Answer 9

Primary
Secondary
Tertiary
Quaternary

Question 10

What are the 2 types of proteins?

Answer 10

Fibrous and Globular

Question 11

Describe globular proteins

Answer 11

Tertiary/Quaternary structures
Hydrophilic (soluble) groups on outside
Are folded into compact shapes
Fold into spherical 3D shape

Question 12

What are some examples of globular proteins?

Answer 12

Insulin
Haemoglobin
Enzymes

Question 13

Describe fibrous proteins.

Answer 13

Little/no tertiary structures
Hydrophobic (insoluble)
Long parallel chains

Question 14

What are some examples of fibrous proteins?

Answer 14

Collagen
Keratin