In a series of experiments, avery treated heat-killed nonvirulent s bacteria with enzymes that degraded the proteins, dna, and rna of the s bacteria, then mixed this with nonvirulent r bacteria. s cells grew in all cases except the samples with degraded dna. what did this demonstrate?

a. protein, dna, and rna from the s bacteria are all necessary for bacterial transformation to occur.
b. protein from the s bacteria is necessary for bacterial transformation to occur.
c. dna from the s bacteria is necessary for bacterial transformation to occur.
d. rna from the s bacteria is necessary for bacterial transformation to occur.

The answer is C. DNA from the S bacteria is necessary for bacterial transformation to occur.

Explanation:

When heat-killed nonvirulent S bacteria will be treated with enzymes that degraded DNA it will destroy the genetic information required for cell survival. DNA is very essential for an organism and is called the molecule of life. DNA degradation is also a part of cell death called apoptosis. That's why all the samples grew except the one where DNA was enzymatically degraded.

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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.