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Question: Suppose that a series of compounds has been discovered in Neurospora. Compounds A-F appear to be members of an enzyme pathway. Several mutations have been identified and strains 1-4 each contain a single mutation. Shown below are five possible pathways. Choose the pathway that best fits the data presented. [Growth in minimal media with supplements is shown by (+), no growth is shown by (o)]
media supplement
Strain
A
B
C
D
E
F
1
o
+
2
3
4
a. A ? B ? C ? D ? E ? F
b. A ? B ? C ? F ? E ? D
c. A ? B ? C ? D
|
E ? F
d. A ? B ? C ? D
e. A ? B ? C ? D
The resting potential of a neuron is approximately -60mV. Neurons maintain this electric potential by maintaining a balance of ions inside and outside the membrane. Which of the following is the most significant factor in determining this balance.
At what stage of the cell cycle are the chromosomes satisfactorily condensed that they FIRST become visible under the light microscope.
What do mean by RFLPs, VNTRs, and SNPs.
Describe the mechanisms through which input from GABAergic inhibitory neurons reduce action potential firing and neurotransmitter release.
A breaking buffer contains 10mM Tris, pH 8.0, 150mM Nacl. The elution buffer is breaking buffer that also contains 300mM imidazole.
Think about an enveloped virus fusing with the plasma membrane. If fusion can not be triggered by low pH because the plasma membrane is neutral,
Create a graph that shows the relationship between fitness and corolla length of a tobacco plant. I am given the corolla length of the parent.
Determine the unexpanded binomial and expanded binomialfor a trait consisting of 4 alleles?
How is a Scathard plot generated, and what measure of the inter-molecular interaction is used to find this?What is the proteasome.
Assume you were given a tube having 1 ml of frozen Staphylococcus epidermidis culture known to contain 5.3 x 103 bacteria/ml. You were told to thaw it by heating at 80°C for 20 min,
He says that the mere presence of DNA is not sufficient to prove the point: his cells may have adopted DNA as a useful molecule quite independently of all other known life forms. What would you do to convince him that he was wrong.
If you were asked to create a karyotype from the chromosome spreads you made from HeLa cells in Activity 4.2.1, list materials you would use and explain how you would make the karyotype.
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