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Using a five step protocol, you have purified an enzyme to the point where the specific activity remains constant when you perform any additional purification steps. When you run the purified enzyme on a gel filtration chromatography column, you find it has a molecular mass of 50 kD. However, when you run the purified enzyme on a SDS-PAGE gel, you obtain two different sized peptides one 30 kD and the other 20 kD. What could be the possible explanations for this result?
Satellite and attached male horseshoe crabs do not have the same reproductive success. why hasnt sexual selection eliminated the low-payoff.
A storm brings two formerly separated populations of beetles together. They look very similar. Under the biological species concept, which would show that the two populations are different species.
Discuss the five main types of histone proteins, and describe what role each of them plays in the nucleosome. Based on what you know about them,
Why is oral administration of a medication the most desirable route? Why can some medications not be given orally? What medications can be divided for doses? What medications should not be crushed for administration?
Utilize the words mesoglea, epidermis, gastrodermis, polyp, medusa, and gastrovascular cavity to describe the differences between the two forms of phylum cnidaria.
If you generated a mutation that sped up rate at which the node moves toward the posterior, what effect would it have on somite formation?
Life arose in water. Explain w hy do you think colonization of land represented a major evolutionary step in the history of life?
It is the accumulation of acetyaldehyde that results in flushed face, dizziness, and light headedness responses that are associated with ethanol intoxication.
Blood glucose was monitored weekly for all mice. After five weeks, there was no change in average body weight between groups.
Assume your friend Charles D., is a forty-five year old male who is newly divorced and is living by himself in a new home. He has told you about some health issues including weight loss.
Explain why is it important to use animals that are the same sex and approximately the same age in experiements?
Complete each of statements given below to identify whether the solution inside each bag washypertonic, hypotonic or isotonic.
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