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What is the purpose of restriction endonucleases in prokaryotes ? how do these organisms protect their dna against the effect of their own restriction enzymes?
Propose a hypothesis to explain the current decline in Songbird numbers. Suggest an experiment that could test your hypothesis.
When you added primary antibody to the wells, what happened if your sample contained the antigen? What are the five basic processes of the digestive system?
What are DNA binding proteins? DNA binding motifs?
Give an example of what their theories might look like in a classroom today.
Assume you are studying a microorganism from a hot spring that uses organic carbon as an energy and carbon source.
How does aggregation occur in sickle-cell anemia? Place the steps in the correct order. Note that deoxyhemoglobin is generally in the T state; oxyhemoglobin is in the R state.
What are the similarities and differences in interphase, prophase, metaphase, anaphase, and telophase in mitosis and meiosis?
Considering an E. coli promoter that could be recognized by a ?70-containing RNA polymerase holoenzyme, which of the promoter elements are always present, and which can be missing or altered? How does this E. coli promoter compare to a typical euk..
It is thought that excess lipids in the cell are packaged into lipid droplets in the endoplasmic reticulum. Explain why lipid droplets bare surrounded by a phospholipid monolayer and not a phospholipid bilayer, like other vesicles that bud from the e..
Explain how adult stem cells can sense and respond to the nutritional status of an animal. Explain what kind of cues an adult stem cell can respond to, and where these cues are coming from.
Determine the initial osmotic pressure at room temperature of a cell if the only ions present are CaCl2 on either side of the membrane. Suppose the concentrastions for K+ and Cl- from Table 7.2.
Explain why is it necessary to introduce the concept of water potential in order to explain water movement from the soil, through the plant and finally to the atmosphere.
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