diagram the reuslts that would been expected from the taylor, woods and hughes experiment after two...
Homework Answers
In one sister chromatid bith DNA strand would be labelled. In other sister chromatid both DNA strands would be unlabelled
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diagram the reuslts that would been expected from the taylor, woods
and hughes experiment after two...
29) a) (2 pts) Diagram the results that would have been expected from the Taylor, Woods and Hughe...
29) a) (2 pts) Diagram the results that would have been expected from the Taylor, Woods and Hughes experiment after one round of replication in the presence of 3H -thymidine if the DNA of Vicia faba replicated conservatively
29) a) (2 pts) Diagram the results that would have been expected from the Taylor, Woods and Hughes experiment after one round of replication in the presence of 3H -thymidine if the DNA of Vicia faba replicated conservatively
An experiment was designed using tritiated thymidine (radioactive). Growing cells of the bean Vicia fava were...
An experiment was designed using tritiated thymidine (radioactive). Growing cells of the bean Vicia fava were labeled. Individual chromatids could be visualized microscopically and the radioactivity seen as dark grains deposited over individual chromatids. The cells were fixed and observed at three times--after labeling all chromatids with radioactive thymidine, after one mitotic division, and after two mitotic divisions. Given that the Watson and Crick semiconservative model for DNA replication is correct, how would the chromosomes and chromatids appear at the...
QUESTION 27 The Meselson and Stahl experiment was used to compare the conservative, semiconservative and dispersive...
QUESTION 27 The Meselson and Stahl experiment was used to compare the conservative, semiconservative and dispersive models of DNA replication. They cultured E. coli cells for several generations in a medium containing heavy nitrogen, 15 N. They then transferred the bacteria to a medium containing a lighter nitrogen isotope, 14 N. Samples were taken after the first round of DNA replication; another sample was taken after the second round of replication. They extracted DNA and centrifuged each sample. Explain (in...
If DNA replicated in a conservative manner what results would you expect after cells were grown...
If DNA replicated in a conservative manner what results would you expect after cells were grown in N15 and one generation in N14 in the Meselson-Stahl experiment? After a second generation in N14? What fraction of the molecules would be at the N15 band, the N14 band and a band in between the two?
In mammalian cells, genes that are expressed in a particular cell are reported to undergo replication during the first h...
In mammalian cells, genes that are expressed in a particular
cell are reported to undergo replication during the first half of S
phase, and genes not expressed in that cell are replicated in the
latter half of S phase.
Briefly describe an experiment that could lead to this
conclusion. You might consider approaches that involve
5-bromouracil incorporation.
Rank from the first step to the last step. To rank items as
equivalent, overlap them.
Selectively isolation early-replicatingLabeling with 5-bromodeoxyuridine genes by...
Mismatch repair requires all of the following EXCEPT: Requires information from a nearby homologous chromosome Uses...
Mismatch repair requires all of the following EXCEPT: Requires information from a nearby homologous chromosome Uses information on the parental strand to identify the error. Is tightly associated with new replicated DNA Makes use of ligase. Requires the use of a repair DNA polymerase. Question 12 Which of the following is NOT necessary for homologous recombination to occur? O nucleases 5' DNA strand overhangs 3' DNA strand overhangs ligase a long stretch of sequence similarity Which of the following apply...
would you please help me filling the blanks! The methyl group in thymidine has been replaced...
would you please help me filling the blanks!
The methyl group in thymidine has been replaced by an iodine atom 12.3.1 Nucleoside analogues Antiviral therapy is aimed at preventing viral DNA from being replicated within the host cell. The strategy is to use molecules which resemble natural nucleosides but which are modified to make them nonfunctional. These are called mucleoside analogues. Idoxuridine HOCH If you would like to remind yourself about the structure of DNA and the functioning of these...
You have found a strain of microorganism, Schizosaccharomyces spp that is very sensitive to mutagenic compounds....
You have found a strain of microorganism, Schizosaccharomyces spp that is very sensitive to mutagenic compounds. When grown in the presence of known mutagens this organism produces many mutant progeny. This microbe, initially isolated from beer-stained carpeting from Zach’s apartment, is obviously deficient in repairing damage to DNA. You perform a series of experiments to determine which repair system is defective. A. You first take two identical cultures and expose them to 30 minutes of irradiation. You place one of...
ANSWER ALL!! Refer to the graph below showing data from the camouflage experiment we studied previously....
ANSWER ALL!!
Refer to the graph below showing data from the camouflage experiment we studied previously. These data are from the light-colored soil enclosure. What is the dependent variable? 40 Light coat Dark coat Number of mice caught 15 10 5 0 Full moon No moon A: Light-colored soil the color of the soil the number of mice caught the mouse coat color the presence or absence of moonlight Consider the amino acids along the a helices of a membrane...
In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" nitrogen (^15...
In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" nitrogen (^15 N) and then transferred the bacteria to a medium containing^14 N ("lighter" nitrogen) and allowed some of the the bacteria to undergo one round of replication and some bacteria to undergo two rounds of replication. They then performed density gradient centrifugation and looked to see where the DNA settled in the test tube. In the diagram below, draw bands indicating the density of the...
29) a) (2 pts) Diagram the results that would have been expected from the Taylor, Woods and Hughes experiment after one round of replication in the presence of 3H -thymidine if the DNA of Vicia faba replicated conservatively
29) a) (2 pts) Diagram the results that would have been expected from the Taylor, Woods and Hughes experiment after one round of replication in the presence of 3H -thymidine if the DNA of Vicia faba replicated conservatively
QUESTION 27 The Meselson and Stahl experiment was used to compare the conservative, semiconservative and dispersive models of DNA replication. They cultured E. coli cells for several generations in a medium containing heavy nitrogen, 15 N. They then transferred the bacteria to a medium containing a lighter nitrogen isotope, 14 N. Samples were taken after the first round of DNA replication; another sample was taken after the second round of replication. They extracted DNA and centrifuged each sample. Explain (in...
In mammalian cells, genes that are expressed in a particular
cell are reported to undergo replication during the first half of S
phase, and genes not expressed in that cell are replicated in the
latter half of S phase.
Briefly describe an experiment that could lead to this
conclusion. You might consider approaches that involve
5-bromouracil incorporation.
Rank from the first step to the last step. To rank items as
equivalent, overlap them.
Selectively isolation early-replicatingLabeling with 5-bromodeoxyuridine genes by...
Mismatch repair requires all of the following EXCEPT: Requires information from a nearby homologous chromosome Uses information on the parental strand to identify the error. Is tightly associated with new replicated DNA Makes use of ligase. Requires the use of a repair DNA polymerase. Question 12 Which of the following is NOT necessary for homologous recombination to occur? O nucleases 5' DNA strand overhangs 3' DNA strand overhangs ligase a long stretch of sequence similarity Which of the following apply...
would you please help me filling the blanks!
The methyl group in thymidine has been replaced by an iodine atom 12.3.1 Nucleoside analogues Antiviral therapy is aimed at preventing viral DNA from being replicated within the host cell. The strategy is to use molecules which resemble natural nucleosides but which are modified to make them nonfunctional. These are called mucleoside analogues. Idoxuridine HOCH If you would like to remind yourself about the structure of DNA and the functioning of these...
ANSWER ALL!!
Refer to the graph below showing data from the camouflage experiment we studied previously. These data are from the light-colored soil enclosure. What is the dependent variable? 40 Light coat Dark coat Number of mice caught 15 10 5 0 Full moon No moon A: Light-colored soil the color of the soil the number of mice caught the mouse coat color the presence or absence of moonlight Consider the amino acids along the a helices of a membrane...
In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" nitrogen (^15 N) and then transferred the bacteria to a medium containing^14 N ("lighter" nitrogen) and allowed some of the the bacteria to undergo one round of replication and some bacteria to undergo two rounds of replication. They then performed density gradient centrifugation and looked to see where the DNA settled in the test tube. In the diagram below, draw bands indicating the density of the...
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