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What reaction is used to radioactivley label DNA?
The reaction used to radioactively label DNA is the random primer labeling reaction. This involves using short oligonucleotide primers that hybridize randomly to the DNA template, which are then extended using a DNA polymerase in the presence of radioactive nucleotides.
Why did Hershey and Chase choose to use viruses in their experiments?
Hershey and Chase chose to use viruses in their experiments because viruses are simple and can easily infect and replicate within host cells, making them ideal for studying the process of genetic material transfer.
Why was the experiment of James van helmont important?
The reason this experiment was important is because he wanted to find out if there was any other intake besides water and soil and there was and it was carbondioxide so it was important to find out carbondioxide.
Why is it important to control an experiment?
Controlling an experiment is important because it allows researchers to isolate and manipulate one variable at a time, ensuring that any changes observed can be attributed to the variable being studied. This helps to minimize confounding factors and increase the reliability of the results obtained. By controlling an experiment, researchers can establish cause-and-effect relationships between variables.
Why does charlie want to be in the experiment?
Charlie, in "Flowers for Algernon," wants to be in the experiment because he hopes it will make him smarter and help him understand the world better. He also desires to escape his current situation of low intelligence and improve his social and personal life.
Why Hershey chase experiment was important?
The Hershey-Chase experiment was important because it provided definitive evidence that DNA, not protein, is the genetic material responsible for transmitting hereditary traits. This experiment helped establish the central role of DNA in molecular biology and genetics. It also supported the theory that genetic information is encoded in the sequence of nucleotides in DNA molecules.
Why is hershey famous?
because he created the hershey bar,kisses,and the hershey school
Why is the Hershey factory famous?
Hershey uses
Why is there an apostrophe in Hershey?
Because anything with an apostrophe before the s shows possession (basic English language), and the person who "invented" the Hershey bar was named Hershey, not Hersheys, had he been named Hersheys instead of Hershey there wouldn't be an apostrophe.
How would the results of the hersheychase experiment have been different if protein were the genetic material?
The experiment would simple prove them wrong and prove that DNA is the genetic carrier.
Why did Milton Hershey make Hershey Park?
he created it because he loves chocolate
Why is Milton Hershey famous?
he became famous because he made the Hershey chocolate!
Evaluate Hershey and Chases's decision to use radioactive phosperus and sulfur for their experiments. Could they have used carbon or oxygen instead why or why not?
Hershey and Chase's decision to use radioactive phosphorus and sulfur was appropriate because these elements are found in DNA and protein, respectively, which allowed them to track the transmission of genetic material. Using carbon or oxygen would not have been effective as they are not prevalent in DNA or proteins and would not provide the same specificity in tracking genetic material.
Why did Hershey and Chase grow viruses in cultures that contained both radioactive Sulfur. What might have happened if they had used only one radioactive substance.?
Hershey and Chase used radioactive Sulfur to label viral proteins, as proteins contain sulfur. By growing the viruses in a culture containing both radioactive Sulfur and Phosphorus, they could differentiate between viral proteins (labeled with Sulfur) and viral DNA (labeled with Phosphorus). If they had only used one radioactive substance, they would not have been able to determine the specific molecule (protein or DNA) that the virus injected into the host cell.
When did Alfred Hershey make his discovery?
Alfred Hershey and Martha Chase did an experiment in 1952 confirming that DNA is genetic material instead of protein. It was previously proven by Griffith in 1928 and then by Avery, McCarty, and MacLeod, but lingering doubts remained because it was previously believed that DNA didn't have the diversity to be hereditary material (Levene, whose status in the science world at that time was akin to that of a rock star, hypothesized that the 4 nucleotides occurred in equal quantities, and repeated in this tetranucleotide pattern - and you don't question a rock star).Hershey and Chase's experiment utilized a bacteriophage (a type of virus that infects bacteria, whose name means bacteria-eater) called T2 in their experiment because it's basically made up of a bit of DNA (some viruses carry RNA) and a protective protein coat, which was what was previously believed to be the genetic material as previously mentioned. Also, they knew that T2 could quickly 'reproduce' through its host cell (Escherichia coli - the normal kind) and have many copies released.They used a radioactive isotope of sulfur to tag protein in one batch of T2 and a radioactive isotope of phosphorus to tag DNA in another batch (there was no sulfur in the DNA and likewise no phosphorus in the protein). They let each infect separate samples of E. coli - whatever T2 injected into E. coli had to be the genetic material because that's what was capable of 'reprogramming' the bacteria.They took the mixtures of T2 and E. coli and blended it to free the T2 leftovers from the E. coli's walls. They then centrifuged (spun it really fast to separate the substances by density) the mixtures. The T2 parts where lighter and thus would be suspended in the liquid, but the E. coli was heavier and would form a pellet on the bottom of the test tube. They would then measure the radioactivity of the liquid and pellet.They tested the radioactive sulfur (protein) experiment and found that, surprise surprise, the pellet was NOT radioactive, but the liquid was. This meant that it wasn't the protein that infected the E. coli.They tested the radioactive phosphorus (DNA) experiment and found that the liquid was NOT radioactive but the pellet WAS. This meant that DNA was the hereditary material, NOT protein.If that wasn't enough, Hershey and Chase went on and returned the radioactive-phosphorus-T2-infected E. coli to a culture medium of more E. coli and let nature run its course. They found that the E. coli released T2s that contained traces of radioactive phosphorus, even further indicating that DNA was the genetic material, not protein.They proved, at least for viruses, that DNA was the genetic material - a complete counter to the popular belief that protein was the genetic material. Then Chargaff came along and completely shredded Levene's tetranucleotide hypothesis. :)
Which candy sells the most Hershey bar or twix?
it would be hershey bars because there so good
Why are Hershey kisses called kisses?
It's called a Hershey Kiss because the machine makes a "smooching" or "kissing" sound when an individual Hershey Kiss is made.
