During polymerase chain reaction, DNA amplification can come to an end
A) when there are no more free nucleotides. B) once the DNA template is used up. C) once the RNA template is used up. D) as DNA polymerase is produced. E) when the stop codon is added to the template.
Prior to genetic engineering, insulin for humans with insulin-dependent diabetes was extracted from pigs and cattle. Presently insulin is produced by transgenic
A) humans. B) chickens. C) viruses. D) bacteria. E) monkeys.