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Q1. Suppose after washing your hands, you leave ten bacterial cells on the new bar of soap. You next decide to do a plate count of the soap after it is left in the soap dish for 24 hours. You dilute 1g of the soap 1:10 and plate it on a standard plate count agar. After 24 hours of incubation, there are 168 colonies. How many bacteria were on the soap? How did they get there?
Q2. Some photosynthetic bacteria (for example purple sulfur bacteria) have photosystem I but not II, while others have both PSI anxd PSII. Which is the might this observation implies?
Data indicate that we are currently in the sixth mass extinction event in the history of the earth. The first five mass extinction events are known from fossils of hard-bodied animals that lived in shallow seas. Why is so much about what we know a..
Determine how many atp equivalents can be obtained by the complete aaerobic ocidation of 5 molecules of glucose? Suppose 1 complete cycle of the CAC per entry point metabolite
describe what is meant by a "genetic switch". give a known example or design one yourself.
How could you determine whether a bacterium fermented the following carbohydrate: mannitol, sorbitol, adonitol, or arabinose?
q1. while breathing underwater with scuba equipment gas is supplied by tank at higher than atmospheric pressure to
In a particular squash plant, white fruit is dominant to yellow fruit.A white fruited plant is crossed to a yellow fruited plant.Whe the seeds from this cross are planted.
Two dominant alleles in mice both affect the appearance of the tail. Shorty (S) produces mice with short tails and hairy produces mice with hairy tails.
Some enzymes have a very flat pH profile, i.e. they have nearly the same activity over a very broad pH range. What might this flat pH profile suggest about the amino acids in the active site of the enzyme?
Usually in solving a crystal structure, the known amino acid sequence is built into the electron density. Mistakes in the protein sequence can be discovered by the X-ray crystallographers.
What are the the five different methods of transporting molecules into cells. Describe each of the methods.
The surface area of lungs in humans is about seventy square meters. Discuss how can this be if the lungs are located in the small space of the and Find name of the large cartilage of the anterior larynx?
what are the peptide bonds joining the amino acids leucine, alanine, phenylalanine, and glycine?
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