★ DNA Quiz
Sickle cell anemia is a disease in which red blood cells become irregularly shaped. The disease is caused by the presence of an incorrect amino acid in a certain protein. The disease most likely occurred due to an altered sequence of nitrogenous bases in the –
A. original DNA in the nucleus.
B. transcribed mRNA strand.
C. tRNA on the ribosome.
D. complementary DNA strands.
Select your answer:
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Biodiversity Conservation › ViewAnimals or plants in danger of becoming extinct in the near future.
A. ecosystem
B. endangered species
C. food chain
Immunology › View
Vaccination works based on the features of
A. Innate immunity
B. Adaptive immunity