Suppose that some cells are grown in culture in the presence of radioactive nucleotides for many generations so that both strands of every DNA molecule include radioactive nucleotides. The cells are then harvested and placed in new medium with nucleotides that are not radioactive so that newly synthesized DNA strands will not be radioactive. What proportion of DNA molecules will contain radioactivity after 2 rounds of replication, assuming semiconservative replication?

Conservative replication

Dispersive replication

Semiconservative replication

Explanation:

That

answer; ///(b) it is composed of four protein chains and four heme groups;

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: