structure of haemoglobin

Question 1

What are the adapatations for red blood cells? 1

Answer 1

= bioconcave shape
= gives large surface area to volume ratio
= allows oxygen to diffuse in and out rapidly
= contains the haemoglobin
= does not have a nucleus- increases volume avaliable for haemoglobin

Question 2

How many polypepitde chains are haemoglobin made from?

Answer 2

= 4
= bound to a prosthetc group haem- conjugated protien
= contains ion fe2+ which are able to bind to oxygen
= 4 haem groups in each haemoglobn molecule
=``

Question 3

Why do mature red blood cells not able to make haemoglobin?

Answer 3

= does not have a nucleus- cannot encode the specific sequence of amino acids
= does not have ribosomes to synthesise proteins
= does not have mitochindria to produce ATP