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What do the bacteria kept at 15c how did population size change during the experiment?
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The facts collected during an experiment are called what?
Sample data, if the experiment only captures a portion of the total population and population data, if the experiment captures the entire population.
What did hershey and chase find through their experiment with virus-infected bacteria?
The idea of their experiment was to determine what kind of macromolecule was the genetic material, DNA or proteins. Bacteriophages, viruses that infect bacteria, were known to carry all of the information needed to make themselves, but using the genetic machinery of their hosts. Based on this, they were used as a simple system that should be governed by the same principals as the genetic information of the bacteria itself. At the time it was known that nearly all phosphorus in macromolecules is found in nucleic acid, and nearly all sulfur is found in proteins (methionine and cycteine). So if you grow cells in radioactive isotopes of phosphorus, the nucleic acids (e.g. DNA) become radioactive, and if you grow cells in radioactive sulfur, proteins become radioactive. Sorry, there's more. Folks studying infection of bacteria by phage found that most of the virus was a "package" that never entered the cell. So if they mixed phage with bacteria and waited 15 minutes and then put the mix in a blender for a few seconds, the packages that had been attached to the outside of the bacteria get ripped off and can be searated from the bacteria. While the packages are no longer attached to the bacteria, the bacteria are already infected, so the virus genes must already be inside. Now the experiment: Hershey and Chase infected bacteria with phage with racdioactive proteins (sulfur) or in a separate experiment radioactive DNA (phosphorus). The bacteria was mixed with virus for 15 minutes, then whoosh, frappe! They then separated the bacteria from the viruses that had not infected bacteria and empty packages, and asked what kind of radioactive macromoleules were able to get inside the bacteria following the short incubation. In the sulfur experiment , the bacteria were NOT radioactive so proteins appeared to not enter the bacteria during this short time frame. In the phosphorus experiment, the bacteria became radioactive after a short incubation, meaning the DNA of the phage had entered the bacteria in the same time frame as the genetic material. This was consistent with DNA being the genetic material of bacteriophage.
What did Griffith discover as a result of his experiments?
Frederick Griffith was a British bacteriologist. In January 1928, he reported what is now known as Griffith's Experiment, the first widely accepted demonstrations of bacterial transformation, whereby a bacterium distinctly changes its form and function.
What does bacteria do in the process of conjugation?
Bacteria exchange genetic material during the process of conjugation to ensure the rise of another offspring which is genetically different.
Why should you use a control during an experiment?
To show what would have happened under normal circumstances
The facts collected during an experiment are called what?
Sample data, if the experiment only captures a portion of the total population and population data, if the experiment captures the entire population.
A factor that does not change during an experiment is?
a constant
What variable did the researcher change during this experiment?
Control Variable
What is the variable that is expected to change during an experiment is the?
The Independent variable
Something that does not change during an experiment?
The answer to your question is the Control Group.
What is the factor that scientist change or manipulate during an experiment?
The variable.
The rate of heat loss from the hot cup change during the experiment answer?
The rate of heat loss from the hot cup decreased during the experiment.
Examples of constant variable?
A constant variable is one that does not change during an experiment. If your experiment includes a dozen cupcakes and that number does not change throughout your experiment, the dozen cupcakes is a constant variable.
A factor that changes during an experiment?
if any factor in an experiment changes, you have a brand new experiment. -A factor in an experiment that can change is known as a variable.
Why is it important to change double variable during an experiment?
becuase because
What does not remain constant during and experiment and is used to measure change?
Temperature.
How would the word change of state in a sentence?
During an experiment a substance may undergo a change of state.
