Besides risking addiction to nicotine or potential risks to brain development, e-cigarettes pose some serious health risks that include all but one of the conditions listed here. a) pm can trigger asthma attacks b) aerosol inhalation may lead to heart attacks. c) chronic aerosol exposure can trigger lung inflammation. d) exposure to heavy metals and volatile organics may lead to cancer.

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.