haemoglobin and collagen structure- lqc 1b

Question 1

is haemoglobin fibrous or globular

Answer 1

globular

Question 2

How many polypeptide chains are present in haemoglobin?

Answer 2

4

Question 3

Does haemoglobin have quaternary structure?

Answer 3

Yes – it has more than one polypeptide chain (4)

Question 4

Is haemoglobin a conjugated protein?

Answer 4

Yes – it has haem (iron containing) groups

Question 5

Is haemoglobin soluble?

Answer 5

Yes – due to hydrophilic R groups on outside of this globular protein

Question 6

What is the function of haemoglobin?

Answer 6

To bind oxygen inside red blood cells, to transport O2

Question 7

is collagen fibrous or globular?

Answer 7

fibrous

Question 8

How many polypeptide chains are present in collagen?

Answer 8

3

Question 9

Does collagen have quaternary structure?

Answer 9

Yes – it has more than one polypeptide chain (3)
Chains lie parallel to each other with cross links (bonds) holding them together for strength

Question 10

Is collagen soluble

Answer 10

No – due to hydrophobic R groups on outside of this fibrous protein

Question 11

What is the function of collagen?

Answer 11

Structural strength and support in skin, artery walls etc.