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In the Meselson and Stahl experiment, E. coli cells were grown in heavy (15N) nitrogen, and then switched to light nitrogen. After two generations, there was 50% light and 50% half heavy DNA. What would the results have been if the conservative model had been correct?
Below, put the expected percentages of each type of DNA after two generations according to the conservative model:
Heavy ______%
Half heavy ______%
Light ______% (5 points)
Briefly describe how a retroelement moves to a new location?
What is the spontaneous generation hypothesis? Explain in detail.
At equilibrium, where DG=0, the equations can be rearranged to the more familiar form known as the Nernst equation, What is the maximum concentration gradient that can be achieved by the ATP-driven active transport into the cell of an uncharged molec..
Why are phosphate compounds so often used to store energy? Why dothey have high energy bonds? Why does an enzyme capable of hydrolyzing glu-alpha-1,4-glu bonds nothave the ability to hydrolyze beta bonds?
Which of the follwing is a malignant tumor.
1.nbspnbspnbspnbsp explain the hierarchy of plant structure using the stem as an example organ and follow it through
How does the structure of DNA (double helix) determine how the genetic information is passed on? How does the cell use the information contained in the DNA to construct proteins (transcription and translation)? How is gene expression regulated (give ..
explain why the internal solute concentration should be different from their marine plant cells.
Using examples, discuss types of genetic mutations that result in faulty proteins and disease,
Compare and contrast DNA and RNA. Discuss why humans did not evolve with one central repository of DNA, but rather it is replicated throughout the body?
Explain the study of hypothesis? Specify the outcome variables and also state how they were measured? Explain the study factors (exposures) and how were they measured?
One of the advantages of some newly developed rapid identification tools i that pure cultures are not needed. Why is pure culture necessary for biochemical tests such as the enterotube but not for DNA probes?
Describe the developmental program of a T cell, including positive and negative selection and changes in phenotypic markers
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