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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 degrees C.
We inoculate equal amounts of cells (1 ml of each starter culture whose population is 1 x 10^6 cfu/ml) into each of two separate 1 liter volumes of LB broth at time=0. One of the flasks is incubated at 37 degrees C, one at 27 degrees C.
Assuming constant exponential growth (i.e. no lag phase, and no exhaustion of nutrients), answer each of these questions:
1) After 6 hours of growth, what is the final concentraion of each strain in each flask?
2) What fraction of the total population is Strain A and Strain B in each flask?
3) How long would each flask need to go for one strain to become 90% of the population?
Explain a species using criteria that are used to determine if two populations are the same species along with a discussion of the procedure of speciation with instance.
What distinguishes reversible inhibitors from irreversible inhibitors - There is an equilibrium between bound and unbound reversible inhibitor. There usually is little back reaction for the binding of an irreversible inhibitor.
Four sisters beign attending your school. one has brown hair and brown eyes. another has brown hair and blue eys. the third has blue eyes, but blonde hair. the fourth has blonde hair too, but she has brown eyes. explain how the princple of indepen..
A 22 year old woman suffered a fracture of the femur in an automobile accident. Two weeks later, the bone defect contains vaxularized, fibrous tissue and newly formed, irregular bone spicules. Which of the following terms best describes this repai..
Which person would tend to have a higher proportion of slow-twitch than fast-twitch muscles: a weight lifter, a sprinter, or a long distance runner?
When does cell division become a factor to consider as we think of the challenges of control of cancer?
What are the effect of discharging primary treated sewage on the biochemical oxygen demand (BOD) and dissolved O2 (DO) of the receiving body of water? What is the effect of a secondary treated sewage on the BOD and DO.
In Tomatoes, the allele for red fruit is dominant over the allele for yellow fruit. The allele for tall plants is dominant over the allele for short plants.
Why are the protists a paraphyletic group, and what would need to change for them to be a monophyletic group?
Explain how phosphate limiting conditions for photosynthesis.
Why is the rocky intertidal such a great place to advance ecological understanding of interspecific interactions ? I just need several main reasons, do not give me a such long paragraph.
Are the shape and size of bonsai trees the result of natural selection or are the shape and size the result of the manner in which they have been managed?
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