Write a paragraph explaining why viruses are not considered to be alive, but they are still studied in biology.

What is the role of the phospholipid belayer in cellular transport in living cells

What factors contribute to the effect an environmental toxin has on the human body?

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