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Which of the following statements concerning prokaryotic and eukaryotic cells is not correct?a. prokaroytic cells contain small membrane-bound organelles.b. eukaryotic cells contain a membrane-bound nucleus.c. DNA is present in nucleous of eukaroyotic.c. DNA is presented in both prokaryotic and eukaroytic cells.d. prokaryotic cells lack a membrane-bound nucelus.
Consider a culture into which two E. coli strains are inoculated. Strain A is normal with g=21 min at 37 degrees C, and 42 mins at 27 degrees C. Strain B has a temperature-sensitive mutation, such that g=55 mins at 37 degrees C, and 39 mins at 27 ..
At 45C, the vapor pressure of water for a glucose solution in which the mole fraction of glucose is 0.080 is 65.76 mmHG. Calculate the activity and activity coefficient of the water in the solution.
Eastern hognose snakes are dietary specialists feeding almost exclusively on toads of the genus Anaxyrus. If you conducted a study of these species at Rock Bridge State Park would you expect the number of snakes in your study area to be large, sma..
In most cells, there are electrochemical gradients of many ions across the plasma membrane even though there are usually only one or two electrogenic pumps present in the membrane. What mechanisms do plants use to load sucrose produced by photosynt..
Compare the effects of the destruction of the spinal nerves dorsal root ganglion and the destruction of the ventral roots.
What is the function of a DNA binding protein and the operator andhow do these regulate an operon (the operon is repressible)?
Two closely related species of wolf spiders live together in northern California. However, meadow wolf spiders are only observed in meadows and forest wolf spiders are only observed in the forest. Both species are found near forest-meadow edges.
A girl with a defective heart receives a new heart transplanted from another child who was killed in an accident. The patient is given an antilymphocyte serum containing antibodies against her lymphocytes. The transplanted heart is not rejected, b..
Discuss the differences and similarities between bacteria and fungi. Include a comparison of size, cell type, reproduction, mode of deriving food, and good versus bad effects on other organisms and the environment. Be sure to give specific example..
name at least three scientists whom you think made the most significant contributions in the study of the cell.justify
Describe how one media can identify both the selective and differential nature of the organism. What components of PCRs require to be changed in order to identify genetically modified meats or milk? Generally give details why those changes need to be..
Set up the suitable two-by-two table and determine a measure of association between current smoking and myocardial infarction. Determine a measure of the excess risk of myocardial infarction in cigarette smokers that is attributable to their smoking.
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