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Why is it important that an experiment include a control group?
A) It is the group in which the researcher predetermines the nature of the results.
B) It provides a reserve of experimental subjects.
C) It is required for the development of a hypothesis.
D) A) Without it, there is no basis for comparison of results.
Long ears in some dogs are an autosomal dominant trait. Two dogs mate and produce a litter in which 75 percent of the puppies have long ears. Of the dogs with long ears in this litter,
Suppose You want to add PMA to 15mL of HL-60 cells so that you have a concentration of 5nM. Your stock solution is 1uM. What is the volume of the stock solution you require?
Would a false positive from the reaction between the inoculating loop and hydrogen peroxide be caused by poor specificity or poor sensitivity of the test system? Explain.
In a gene expression experiment for determining biochemical pathways in Serratia marcescens, are the mutant strains utilized in this experiment true auxotrophs? Why or why not?
A patient has been brought to you who is thought to have a mutation of the DVL1 gene, a human homologue of the Drosophila Disheveled gene.
What are ten - twenty possible variables that may affect seed germination? Make a table for your data, including title, units, and any other useful information.
Justify the hypothesis of early microorganisms were chemolithotroph and why phototrophic organisms that came after had pigments that absorbed maximally at UV and IR radiation
Assume you have isolated a decapeptide called fighting illini which has anticancer activity. Determine the sequence of the peptide from the data.
Develop a dilution scheme to show how you might prepare 250 mL of a solution of twenty mM NaCl from the stock solution.
The phosphorylation and dephosphorylation of proteins is a vital means of regulation. Protein kinases attach phosphoryl groups, whereas phosphatases remove phosphoryl group from the target protein. What is the energy charge of this kind of covalen..
Discuss how temperature affects the hemoglobin saturation curve and how does temperature affect the delivery of oxygen to the tissues?
Assume you have achieved your dream and are now a prominent immunologist. One afternoon, while pondering which direction your research should take, you vividly remember the pain that the rusty nail incident caused.
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