Question

can you tell me which is answer and why they are right and wrong?

Please choose the true statement:

1. Sickle cell anemia is a recessive autosomal mutation that confers survival advantage to heterozygous individuals who contract malaria.

2. In aqueous solution, most proteins are surrounded by a hydration cage of water molecules that is energetically unfavorable because it limits the entropy of water.

3. Thalassemia is caused by too much methemoglobin in the blood.

Answer 1

1) Its 'TRUE' that heterozygous individuals who have sickle cell anemia have survival advantage. Malarial parasite spends part of its lifecycle in blood cells. So, when the infected blood cells are expelled out, patient will not be affected from malaria but ultimately will die of sickle cell anemia.