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?
Homework Answers
Results show that after one generation, the double stranded DNA is 1/2 heavy (from the parent) and 1/2 light (newly synthesized). This means that 100% of the strands are of intermediate density. After a second generation, one half of the new daughter strands are light (using 14N DNA as template and synthesizing 14N DNA) and one half are intermediate density (using 15N DNA as a template and 14N DNA for synthesis). This result is predicted by semiconservative replication.
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If DNA replicated in a conservative manner what results would
you expect after cells were grown...
If DNA was replicated via a conservative mechanism and you repeated the Meselson and Stahl experiment,...
If DNA was replicated via a conservative mechanism and you repeated the Meselson and Stahl experiment, what would you expect to see when the bacteria was allowed to replicate 3 times (60 min) in the N14 medium and DNA was extracted and centrifuged? Select one: a. several bands (uncountable) forming a smear across the tube b. Two bands one formed using only N14 and one formed by N15 c. it is impossible to determine given the information provided d. Two...
QUESTION 3 What were the actual results of the Meselson and Stahl experiment after two generations?...
QUESTION 3 What were the actual results of the Meselson and Stahl experiment after two generations? N14 N14 N14 N15 IT - N15 N15 A B C D Sample A Sample B Sample C Sample D
After Watson and Crick proposed the double helix model of DNA, three models for DNA replication...
After Watson and Crick proposed the double helix model of DNA, three models for DNA replication were proposed: conservative, semiconservative and dispersive. The following figures illustrate the Meselson and Stahl experiment, which demonstrated the correctness of the semiconservative model of DNA replication N15 N14 How would the results be if the correct model was the conservative or dispersive: 1. Conservative: 20 40 60 80 Time (min.) 2. Dispersive 20 40 60 80 Time (min.)
What would have been an appropriate conclusion if Gorbsky et al had seen the photobleached mark...
What would have been an appropriate conclusion if Gorbsky et al had seen the photobleached mark to move towards the centrosome? Select one: a. None of the statements could be concluded from that result b. Dyenin moves the chromosomes towards the poles of the spindle c. Microtubules shorten at the chromosome end during anaphase d. Microtubules shorten at the centrosome end during anaphase e. Kinesin moves the chromosomes towards the poles of the spindle If DNA was replicated via a...
Please explain which one I missed, I got a 8/10. Might be the last question that...
Please explain which one I missed, I got a 8/10. Might be the
last question that I missed!
ament Quiz -U01-202020 Fund of Biology | The Meselson-Stahl experiment demonstrated that DNA replication produces two DNA molecules each composed of _? Select one a One Old stand of nucleotides and One new strand of nucleotides b. A varying number of strands of old and new nucleotides Two strands of old and new nucleotides mixed d. Two new strands of nucleotides e....
Question 45 Which of the following body axis is determined by the sperm entry point in...
Question 45 Which of the following body axis is determined by the sperm entry point in the developing frog embryo? Not yet answered Points out of 2.50 Flag question Select one: O a. none of the body axis are determined by the site of sperm entry O b. Anterior - posterior O c. right-left O d. Dorsal - ventral Question 46 Not yet answered If DNA was replicated via a conservative mechanism and you repeated the Meselson and Stahl experiment,...
How did Meselson and Stahl distinguish between semiconservative and conservative replication in their experiment? a After...
How did Meselson and Stahl distinguish between semiconservative and conservative replication in their experiment? a After two rounds of replication, only mixed DNA molecules were present in the gradient. b After one round of replication, only mixed DNA molecules were present in the gradient. c After one round of replication, only heavy DNA molecules were present in the gradient. d After one round of replication, only mixed DNA strands were present in alkaline gradients.
Question 7 (1 point) Saved DNA replication occurs through the semi-conservative replication mechanism; what was observed...
Question 7 (1 point) Saved DNA replication occurs through the semi-conservative replication mechanism; what was observed in the Meselson and Stahl experiment, in which DNA purified from E. coli growing on 14N-medium was centrifuged in a density gradient tube, by the third generation of DNA replication? One band representing "light" DNA OTwo bands: a light density band and a faint hybrid density band Three bands: one each of light density, hybrid density, and high density bands One band representing "heavy"...
please explain in details the answer I Q.9. (5 points) What result would Meselson and Stahl have obtained if the re...
please explain in details the answer
I Q.9. (5 points) What result would Meselson and Stahl have obtained if the replication of DNA were conservative? Give the expected distribution of "heavy", "light" and "hybrid" DNA molecules after 1.0 and 2.0 generations for conservative replication.
I Q.9. (5 points) What result would Meselson and Stahl have obtained if the replication of DNA were conservative? Give the expected distribution of "heavy", "light" and "hybrid" DNA molecules after 1.0 and 2.0 generations for...
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 was replicated via a conservative mechanism and you repeated the Meselson and Stahl experiment, what would you expect to see when the bacteria was allowed to replicate 3 times (60 min) in the N14 medium and DNA was extracted and centrifuged? Select one: a. several bands (uncountable) forming a smear across the tube b. Two bands one formed using only N14 and one formed by N15 c. it is impossible to determine given the information provided d. Two...
QUESTION 3 What were the actual results of the Meselson and Stahl experiment after two generations? N14 N14 N14 N15 IT - N15 N15 A B C D Sample A Sample B Sample C Sample D
After Watson and Crick proposed the double helix model of DNA, three models for DNA replication were proposed: conservative, semiconservative and dispersive. The following figures illustrate the Meselson and Stahl experiment, which demonstrated the correctness of the semiconservative model of DNA replication N15 N14 How would the results be if the correct model was the conservative or dispersive: 1. Conservative: 20 40 60 80 Time (min.) 2. Dispersive 20 40 60 80 Time (min.)
What would have been an appropriate conclusion if Gorbsky et al had seen the photobleached mark to move towards the centrosome? Select one: a. None of the statements could be concluded from that result b. Dyenin moves the chromosomes towards the poles of the spindle c. Microtubules shorten at the chromosome end during anaphase d. Microtubules shorten at the centrosome end during anaphase e. Kinesin moves the chromosomes towards the poles of the spindle If DNA was replicated via a...
Please explain which one I missed, I got a 8/10. Might be the
last question that I missed!
ament Quiz -U01-202020 Fund of Biology | The Meselson-Stahl experiment demonstrated that DNA replication produces two DNA molecules each composed of _? Select one a One Old stand of nucleotides and One new strand of nucleotides b. A varying number of strands of old and new nucleotides Two strands of old and new nucleotides mixed d. Two new strands of nucleotides e....
Question 45 Which of the following body axis is determined by the sperm entry point in the developing frog embryo? Not yet answered Points out of 2.50 Flag question Select one: O a. none of the body axis are determined by the site of sperm entry O b. Anterior - posterior O c. right-left O d. Dorsal - ventral Question 46 Not yet answered If DNA was replicated via a conservative mechanism and you repeated the Meselson and Stahl experiment,...
Question 7 (1 point) Saved DNA replication occurs through the semi-conservative replication mechanism; what was observed in the Meselson and Stahl experiment, in which DNA purified from E. coli growing on 14N-medium was centrifuged in a density gradient tube, by the third generation of DNA replication? One band representing "light" DNA OTwo bands: a light density band and a faint hybrid density band Three bands: one each of light density, hybrid density, and high density bands One band representing "heavy"...
please explain in details the answer
I Q.9. (5 points) What result would Meselson and Stahl have obtained if the replication of DNA were conservative? Give the expected distribution of "heavy", "light" and "hybrid" DNA molecules after 1.0 and 2.0 generations for conservative replication.
I Q.9. (5 points) What result would Meselson and Stahl have obtained if the replication of DNA were conservative? Give the expected distribution of "heavy", "light" and "hybrid" DNA molecules after 1.0 and 2.0 generations for...
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...
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