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A microbiologist inoculates a growth medium with 200 bacterial cells/ml. If the generation time of the species is 1.5 hours. How many generations will it take for the culture to contain more than 6,000 cells/ml? How long, in hours, will it be before the culture contains more than 6,000 cells/ml? Show your calculations.
In our population there are 300 red sea stars, 200 pink sea stars and 500 White Sea stars. How numerous total alleles for sea star colour are in this population.
Eukaryotic RNA polymerases lack sigma factors. What proteins bind TATA promoters in eukaryotes.
A 78 year old women has a mean arterial pressure of 120 mmHg and a heart rate of sixty bpm. She has a stroke volume of 50 mL, cardiac output of 3000 mL/min and a right atrial pressure of 0 mmHg.
What is the difference between background selection and a selective sweep? How can the two be distinguished based on analysis of DNA sequences.
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?
What is the significance of adenine, thymine, guanine, and cytosine in the structure of a DNA molecule.define how these four nucleotides bond.
Ribozymes have various catalytic activities with reactions that follow classical enzyme kinetics other than with low catalytic rate.
An alpha helix of twenty to twenty-five amino acids is needed to span the plasma membrane of cells. Based on the dimensions of an alpha-helix, calculate the range in width of the membrane?
Explain where do cells obtain their main macronutrients including C, N, H, and O, write down the general microbial cell formula.
In interrupted mating experiments using an Hfr strain in E. coli, you find that two genes, bio and arg, are transferred at about the same time. A third gene, pab is transferred slightly later.
What characteristics of beets make them useful as experimental models for studying cellular membranes?Why is the biologically important.
Describe why extinction is necessary aspect of evolution. What would happen if nothing died and there were no extinction?
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