7.1 haemoglobin

Question 1

what are haemoglobin molecules?

Answer 1

group of chemically similar molecules

Question 2

where are haemoglobin found in and what does this prove?

Answer 2

wide variety of organisms; proof of evolution

Question 3

what are haemoglobin comprised of?

Answer 3

protein molecules that shows quarternary structure

Question 4

explain what is meant by associating/loading haemoglobin with oxygen.

Answer 4

haemoglobin binds with oxygen

Question 5

explain what is meant by unloading/disassociating haemoglobin with oxygen.

Answer 5

haemoglobin releases oxygen

Question 6

where does the disassociation of haemoglobin happen in humans?

Answer 6

respiring tissues

Question 7

what is the affinity of haemoglobin?

Answer 7

how easy it was for haemoglobin to bind with oxygen

Question 8

high affinity of haemoglobin

Answer 8

takes up oxygen more easily

Question 9

low affinity of haemoglobin

Answer 9

releases oxygen more easily

Question 10

what is the main role of haemoglobin?

Answer 10

transport oxygen

Question 11

how could haemoglobin help increase the efficiency of oxygen transport?

Answer 11

• readily associate / dissociate at appropriate places
• changes affinity

Question 12

how could haemoglobin change affinity?

Answer 12

changes shape by the presence of CO2 which affects pH