Answer- Experiment performed by Taylor, Woods, and Hughes was based on radioactive thymidine and proved the semiconservative mode of DNA replication.
Here the possible result is shown if DNA replication is conservative-
It is clear that if DNA replication is conservative then two separate DNA bands must be obtained but this doesn't happened experimentally.
In actual experiment only one DNA band was obtained after one round of replication having one strand with radioactive thymidine, thus DNA replication is semiconservative.
29) a) (2 pts) Diagram the results that would have been expected from the Taylor, Woods and Hughe...
diagram the reuslts that would been expected from the taylor, woods and hughes experiment after two round of replication ( the first in the presence of radioactive thymidine and the second in the presence of non-radioactive thymidine) if the DNA of Vicia faba replicated dispeesively.
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...
1. If DNA polymerase III was going to attach a new nucleotide onto the DNA molecule shown to the right, where would it attach it? 2. Why are the ends labeled A and C different? a. The diagram is drawn incorrectly, they should be the same One is o pure onsa pyrimidine. c. One is a purine, one is a pyrimidine d. Double-stranded DNA is antiparallel. e. This is after DNA replication -before DNA replication, they look the same. 3....
4. In a lake governed by the food web shown in the image to the right, 500 brown trout are added from fisheries. Which of the following outcomes would most likely be expected? A. Tadpole population will increase B. Duck population will decrease C. Algae population will increase D. Lilly Pad population will decrease E. Caddis Fly larvae will increase 5. Which of the following pieces of evidence most strongly supports a common ancestor of all life on Earth? 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....
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...
QUESTION 11 Meselson and Stahl had obtained the resuk below, what would have been there conclusion First Generation Replication Replication N4 14 NINIS NAS N15 DNA replication is conservative DNA replication is semi-conservative DNA replication is dispersive None of the above QUESTION 12 If one strand of DNA Is CGGTAC in the 5-3 direction, what is the corresponding complementary strand of DNA in the 53' direction? GCCTAG ©GTACG TAACGT GCCATG CATGGA QUESTION 13 Which of the following statements regarding the...
You are interested in studying the expression of Neurogenesis-2 (NG-2), a protein that may have a role in neurogenesis in the brain. You know that neurogenesis slows/stops as mice age, so you hypothesize that it will be highly expressed in young mice compared to old mice. (NG-2 is a fake protein used for this test question). Please note that you are being asked to analyze NG-2 at the PROTEIN level. Select appropriate techniques and technologies. (20 pts total). a) Describe...
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...
(2 pts) You are studying lactose metabolism and have been culturing E. coliin different medias. One media has only glucose, one has only lactose, and a third has both glucose and lactose. (1 pt)You notice that some of the cultures grown in the presence of both glucose and lactose are metabolizing lactose. Which type(s) of mutation(s) could cause this to occur? (1 pt)You notice that some E. colicultures failed to grow in the presence of only lactose. You know that...