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A protein has a molecular mass of 200 kDa as determined by gel filtration (=native molecular weight). When separated by SDS-PAGE (without a reducing agent present) only one polypeptide appeared with a mass corresponding to 100 kDa. When determined by SDS-PAGE in combination with a reducing agent (DTT) exactly two polypeptides appeared of sizes 40 and 60 kDa. What is the correct structure of the native protein?
Select one:
a. The native protein is made of one 40 kDA and one 60 kDA polypeptidesb. The native protein is made of two 100 kDa polypeptidesc. The native protein is made of two 40 kDA and two 60 kDA polypeptidesd. The native protein is made of two 100 kDa polypeptides, one 40 kDA and one 60 kDA polypeptidese. None of the answers is correct.
Identify sister taxa, then larger groups that share a common ancestor. Create an phylogenetic tree showing the evolutionary relationships among these ten species.
predict the effects of a drug that activates the sympathedic nervous system on blood pressure and heart rate. How would this drug affect the three factors that determin blood pressure?
Two species of garter snakes live in the same geographic area. One generally lives in water and the other mainly on land, so that they rarely encounter each other and do not interbreed. This is an example of what category of genetic isolation.
Recently, some researchers have discovered that having an extra copy of a certain very small region on the 16th chromosome leads to individuals with extremely low BMI (body mass index). Describe two different structural mutations that could lead t..
Our digestive and urinary systems process our food and body waste to remain our bodies nourished and functioning. Poor diet and hygiene can compromise our digestive and urinary systems,
Why is it important that an experiment include a control group.
With patient in a supine position, you asked him to lift his head. You noticed that the abdominal muscles contract. What do you think is the reason behind this motion?
In the F2 generation, how many genotypic classes are possible from a trihybrid cross of heterozygotes in Determine which the genes involved show complete dominance?
Briefly describe how the oxygen effect plays an important role in reducing the ability of a radiation oncologist to treat tumors with the high energy electron beams from accelerators in Radiation Oncology facilities.
Define partial pressure of a gas and identify 3 different units used to measure partial pressure. What is the PO2 of the atmosphere at sea level? Express in units of torr.
What two innovations are the most important in allowing the gymnosperms and angiosperms to become mores successful than earlier land plants?
What ethical arguments relating to human use of natural resources are relevant to the use of ecological calculators?
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