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.
Homework Answers
In Meselson and Stahl experiment they grew the bacteria continuously in N15 media then transferred to N14 media, after one round of DNA replication, they found that new Double-stranded DNA molecules had the intermediate density, this shows the DNA replication is semiconservative, one heavy strand from the parental DNA is used as the template strand so that the newly synthesized double-stranded DNA has one heavy parental strand and one new light DNA strand.
so the answer is b After one round of replication, only mixed DNA molecules were present in the gradient.
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How did Meselson and Stahl distinguish between semiconservative
and conservative replication in their experiment?
a After...
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...
Briefly describe the Meselson and Stahl experiment that indicated that DNA replication is semiconservative. How would...
Briefly describe the Meselson and Stahl experiment that indicated that DNA replication is semiconservative. How would their results have differed if DNA replication was actually conservative in nature?
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...
The initial proposal for DNA replication is either conservative or semiconservative (not liberal). In the "most...
The initial proposal for DNA replication is either conservative or semiconservative (not liberal). In the "most beautiful experiment in biology", Meselson and Stahl proved it is one not the other. This is a seminal discovery that solidified the mechanism of DNA replication and transfer of genetic material. A) briefly describe the experiment and how the conclusion was reached; (2 points) B) What would the experimental result be if DNA replication is conservative? Describe for two rounds of replication starting with...
After one round of replication in 14-N media for the Meselson Stahl experiment, scientists could conclude...
After one round of replication in 14-N media for the Meselson Stahl experiment, scientists could conclude that: a) replication is semi-conservative b)replication is not conservative c)replication is not dispersive d)replication is neither dispersive nor conservative e) None of the above
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...
In a famous experiment, Matthew Meselson and Franklin Stahl grew E.coli cells in a medium containing...
In a famous experiment, Matthew Meselson and Franklin Stahl grew E.coli cells in a medium containing only the "her isotope of nitrogen, SN. These cells were then transferred to a medium with the "light" isotope of nitrogen, "N. The results of the experiment supported the hypothesis of semiconservative replication, which was proposed by Watson and Crick. Heavy DNA ('N DNA), hybrid DNA, and light DNA (N DNA) can be separated by centrifugation. If cells containing 1SN DNA are transferred to...
Matthew Meselson and Franklin Stahl performed an experiment using heavy isotopes and bacteria to determine which...
Matthew Meselson and Franklin Stahl performed an experiment using heavy isotopes and bacteria to determine which model DNA follows to replicate. Their results are evidence supporting which DNA replication model below? a. The parent DNA molecule is broken into its singular nucleotides from which new nucleotides are copied and then all nucleotides to come back together as one larger DNA molecule. b. The parent DNA is mixed into each of the daughter strands such that both daughter molecules contain a...
How did Meselson and Stahl demonstrate replication in E. coli takes place in a semi-conservative manner?
How did Meselson and Stahl demonstrate replication in E. coli takes place in a semi-conservative manner?
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 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 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...
The initial proposal for DNA replication is either conservative or semiconservative (not liberal). In the "most beautiful experiment in biology", Meselson and Stahl proved it is one not the other. This is a seminal discovery that solidified the mechanism of DNA replication and transfer of genetic material. A) briefly describe the experiment and how the conclusion was reached; (2 points) B) What would the experimental result be if DNA replication is conservative? Describe for two rounds of replication starting with...
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...
In a famous experiment, Matthew Meselson and Franklin Stahl grew E.coli cells in a medium containing only the "her isotope of nitrogen, SN. These cells were then transferred to a medium with the "light" isotope of nitrogen, "N. The results of the experiment supported the hypothesis of semiconservative replication, which was proposed by Watson and Crick. Heavy DNA ('N DNA), hybrid DNA, and light DNA (N DNA) can be separated by centrifugation. If cells containing 1SN DNA are transferred to...
How did Meselson and Stahl demonstrate replication in E. coli takes place in a semi-conservative manner?
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....
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