In addition to dna polymerase and primers, the polymerase chain reaction also requires, a. a large amount of dna, b. restriction enzymes, c. a supply of the four dna nucleotides, d. complementary sequences of dna

The answer isC. a supply of the four DNA nucleotides

PCR or polymerase chain reaction is used to amplify the desired DNA sequence into million copies. DNA polymerase, primers, a supply of the four DNA nucleotides. A large amount of DNA is not necessary since we will amplify it in the PCR. Restriction enzymes would cut DNA, and complementary DNA sequence would bind to DNA and disable its amplification.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.