Changes in dna that sometimes do and sometimes don't have a harmful effect are called what?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell