Increased exposure to X-rays
The hemoglobin holoenzyme (active enzyme) is a complex of an iron ion and 4 subunits- 2 hemoglobin alpha and two hemoglobin beta. People with sickle cell disease have mutated beta hemoglobins. The mutation is a single nucleotide exchange, that changes the 6th amino acid of protein primary struture - a Glutamic acid into Valine. This one alteration changes the tree dimentional structure of hemoglobin beta so, that it forms lond fibres that disrupt the normal circular form of the red blood cells.
The answer would be the second choice, "Central Nervous System"
Answer:
Nature and Nurture
Explanation:
Dr Bartholomew believes that behaviour is because of nurture, meaning that it is based on where you are raised or who raised you.
Dr. Tiburon on te other hand believe that behaiour is something that you inherit from birth and therefore believes in nature.
