What happens when antibodies encounter a foreign blood protein?

Why zebra fish experience similar genetic disease as human

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above

The backbone of the double helix has an alternating molecules. what do you call these alternating molecule?