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For fusion of a vesicle with it's target membrane to occur. The membranes have to be brought to within 1.5 nm so the two bilayers can join. Assuming that the relevant portion of the two membranes at the fusion site are circular regions 1.5 nm in diameter, calculate the number of water molecules that would remain between the two membranes ( water is 55.5 m and the volume of a cylinder is πr^2h). Given that an average phosphlpid occupies a membrane surface of 0.2nm^2, how many phospholipids would be present in each f the opposng monolayers at the fusion site? Are there sufficent water molecules to associate with the hydrophillic head groups of this number of phospholipids (10 phospholipids associate with each headgroup)?
Describe why an anaerobic indicator strip in an anaerobic environment will revert to blue if it gets wet.
Assume you have an unknown DNA that you know is phage DNA - It is either T7 or lambda. You perform a restriction enzyme digest and run the results on a gel.
A young man was brought to the hospital suffering an unknown disease. Unfortunately, the young patient did not make it. Upon examination of his liver cells it was determined that the liver cells were extremely unhealthy.
Provide examples of the following prezygotic barriers to reproduction: Temporal isolation, Habitat isolation, Behavioral isolation, Mechanical isolation, and Gametic isolation.
Determine which of the following correctly describes how myelination alters the passive properties of the neuronal membrane?
The calculation of interaural time difference (ITD) is often modeled as a cross correlation. Re-write the cross-correlation equation in terms of ITD.
Think about a cross between two strains of peas that differ at all seven of the traits that Mendel used (a heptahybrid cross)? Among the F2 offsprings:
1) What is the general purpose of photosynthesis? 2) describe the anatomy of a chloroplast and where they are found. 3)What are the sources of carbon, oxygen, and hydrogen in the photosynthetic reaction?
Assume you remove your test cultures from the incubator and notice that one of them- a know fermenter- has a gas bubble in the Durham tube.
What is the central dogma? And what are it's three main molecular components?
Consider three characteristics in the hypothetical animal, the zeebog from Madagascar. In the population, Madagascar zeebogs are either hairy (H) or hairless (h); crazy (C) or sane (c); and mischievous (M) or innocent (m).
Difference between a hereditary germline cancer, such as those caused by BRCA1 mutations, and cancers that result from two somatic mutations in the same gene in the same cell.
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