Q: Acridine orange is a chemical that inhibits the replication of F-
Acridine orange is a chemical that inhibits the replication of F-factor DNA but does not affect the replication of chromosomal DNA, even if the chromosomal DNA contains an Hfr. Let’s suppose that you...
See AnswerQ: Two circular DNA molecules, which we can call molecule A and
Two circular DNA molecules, which we can call molecule A and molecule B, are topoisomers of each other. When viewed under the electron microscope, molecule A appears more compact than molecule B. The...
See AnswerQ: At the molecular level, what is the explanation for why the
At the molecular level, what is the explanation for why the four-o’clock flowers are pink instead of red?
See AnswerQ: Let’s suppose you have isolated DNA from a cell and viewed it
Let’s suppose you have isolated DNA from a cell and viewed it under a microscope. It looks supercoiled. What experiment would you perform to determine if it is positively or negatively supercoiled? In...
See AnswerQ: We seem to know more about the structure of eukaryotic chromosomal DNA
We seem to know more about the structure of eukaryotic chromosomal DNA than bacterial DNA. Discuss why you think this is so, and list several experimental procedures that have yielded important inform...
See AnswerQ: In Noll’s experiment of Figure 10.11, explain where DNase
In Noll’s experiment of Figure 10.11, explain where DNase I cuts the DNA. Why were the bands on the gel in multiples of 200 bp at lower DNase I concentrations? From Figure 10.11:
See AnswerQ: When chromatin is treated with a salt solution of moderate concentration,
When chromatin is treated with a salt solution of moderate concentration, the linker histone H1 is removed. A higher salt concentration removes the rest of the histone proteins. If the experiment of F...
See AnswerQ: Let’s suppose you have isolated chromatin from some bizarre eukaryote with a
Let’s suppose you have isolated chromatin from some bizarre eukaryote with a linker region that is usually 300–350 bp in length. The nucleosome structure is the same as in other eukaryotes. If you dig...
See AnswerQ: Answer the following questions pertaining to the experiment of Figure 11.
Answer the following questions pertaining to the experiment of Figure 11.3. A. What would be the expected results if the Meselson and Stahl experiment were carried out for four or five generations?...
See AnswerQ: An absentminded researcher follows the steps of Figure 11.3,
An absentminded researcher follows the steps of Figure 11.3, and when the gradient is viewed under UV light, the researcher does not see any bands at all. Which of the following mistakes could account...
See Answer
