Although interferons have several effects, they are particularly useful against infections with which type of pathogen?
bacteria
viruses
fungi
helminths

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Fredrick griffith made a scientific discovery in 1928

What is an example of a scientific question that galileo could not have answered with out this new tool?