Haemoglobin

Question 1

What is haemoglobin

Answer 1

A protein

Question 2

Describe the primary structure of haemoglobin

Answer 2

A sequence of amino acids in 4 polypeptide chains

Question 3

Describe the secondary structure of haemoglobin

Answer 3

Each polypeptide chain coiled in 2 beta pleated sheets an 2 alpha helix’s

Question 4

Describe the tertiary structure of haemoglobin

Answer 4

Polypeptide chains folded into a precise shape for a specific function which is carrying 02

Question 5

Describe the quaternary structure of haemoglobin

Answer 5

4 polypeptide chains link to form a spherical shape

Question 6

What is each polypeptide chain associated with in haemoglobin

Answer 6

Haem group

Question 7

What does a haem group contain

Answer 7

Fe2+ ions

Question 8

What is the process called by which haemoglobin binds with 02

Answer 8

Associating

Question 9

What is the process called in which haemoglobin releases 02

Answer 9

Dissociating

Question 10

3 roles of haemoglobin

Answer 10

• Efficient at transporting 02
• readily associate with 02 at gas exchange surfaces
• readily dissociate with 02 at tissues

Question 11

What form when 02 combines with haemoglobin(hb )

Answer 11

Hbo8 is formed

Question 12

What does high affinity mean

Answer 12

Takes up 02 easily but releases it less easily

Question 13

What does low affinity mean

Answer 13

Take up 02 less easily but release more easily