Answer:
E. The 32P was associated with the bacterial cells and 35S was associated with the phage particles.
Explanation:
Hershey and Chase's experiment proved that DNA serves as the genetic material of the cell.
This experiment used the bacteriophage which could infect the bacteria by integrating its DNA into the bacterial genome. For this, he used radioactive phosphorus and radioactive sulphur.
Phosphorus is a constituent of the DNA and sulphur is the constituent of the proteins. This means if the DNA is transferred, then radioactive Phosphorus will be transferred but if proteins are transferred then radioactive sulphur is transferred.
He found the radioactive phosphorus attached to the bacteria and sulphur to the phage itself. This suggested that the DNA material is transferred and acts a hereditary material and not the protein.
Thus, Option-E is correct.
Answer:
B. The population must be very large.
Explanation:
It really depends on the type of cell and the replacement rate. Mitosis or cell division occurs in places where the cells get damaged easily. For example, skin cells frequently divide and undergo mitosis because they are replaced very often. On the contrary, heart cells never get replaced and actually never really undergo mitosis (there is no need for it)
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