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Clostridium perfringens causes gas gangrene and has a very rapid generation time of only nine minutes. Suppose a patient had a wound with a single contaminating Clostridium perfringens bacillus. How many C. perfringens bacteria would there be in the wound after just 9 hours of multiplying. (since each generation time or doubling time is 9 minutes long and there are 60 minutes in an hour, 9 hours would contain 60 divisions or doublings)
You have two true-breeding tomato plants. One is tall (T) with a bristly stem (B) and white flowers (r). The other is short (t) with a smooth stem (b) and red flowers (R).
Color-blindness is a recessive, sex-linked condition. A woman with normal vision, whose father is color-blind and whose mother is not color-blind, marries a man who is not color-blind.
A 4 year old boy falls on a rusty nail and punctues his skin. The wound is cleaned and covered with sterile gauze. Which of the following is the initial events in the healing process.
In Drosophila, a cross was made between 2-mutant flies, one homozygous for the recessive mutation bent wing and the other homozygous for the recessive mutation eyeless.
In the four cell stage C. elegans embryo the P1 blastomere induces endoderm formation in the posterior daughter of the EMS blastomere.
All of the following are characteristics of eukaryotic organisms EXCEPT: a. Most are multicellular b. Their cells have DNA c. Their cells have plasma membranes d. Their cells are small compared to prokaryotes e. They include plants
What is the possibility that they will have a daughter that has the disease. Vitamin-D resistant rickets is a sex-linked dominant trait.
Explain how the cell regulates the transition from G1 phase to S phase. Describe the functions of the major regulatory proteins (which can include tumor suppressors).
For each of the four major themes of animal evolution used in this course, describe the advantages and disadvantages of the trait. Next, list the major groups each major theme produced, and comment on the number of species and individuals in those..
Release kinetics. The equilibrium constant K for the binding of oxygen to myoglobin is 10?6 M, where K is defined as.
How would anaphase be disrupted if a key protein in the kinetochore was inactivated?
Assume you review a young patient in the emergency room who is complaining of ankle pain following a soccer game. The patient shows to you that an accident resulted in his foot being forced into an excessively inverted position.
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