Several members of the same family were diagnosed with the s…
Several members of the same family were diagnosed with the same kind of cancer when they were unusually young. Which one of the following is the most likely explanation for this phenomenon? It is possible that the individuals with the cancer have inherited
Read DetailsYou prepare bacterial cell extracts by lysing the cells and…
You prepare bacterial cell extracts by lysing the cells and removing insoluble debris via centrifugation. These extracts provide the proteins required for DNA replication. Your DNA template is a small, double-stranded circular piece of DNA (a plasmid, figure below) with a single origin of replication and a single replication termination site. The termination site is on the opposite side of the plasmid from the origin. Which of the following statements is TRUE with respect to this in vitro replication system?
Read DetailsHuman beings with the inherited disease xeroderma pigmentosu…
Human beings with the inherited disease xeroderma pigmentosum have serious problems with lesions on their skin and often develop skin cancer with repeated exposure to sunlight. What type of DNA damage is not being recognized in the cells of these individuals?
Read DetailsIn somatic cells, if a base is mismatched in one new daughte…
In somatic cells, if a base is mismatched in one new daughter strand during DNA replication, and is not repaired, what fraction of the DNA duplexes will have a permanent change in the DNA sequence after the second round of DNA replication?
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