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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 how Dendritic cells and T regulatory cells affect immune tolerance. And what woulld happen if there is too much immuno tolerance ?
For lunch, Joe, a college freshman, has a smoothie made with blended fruit and juice. His friend has a burger, fries, and a milkshake. Whose stomach will empty faster? Why.
E. coli glutamine synthatase is covalently modified by adenylylation(the addition of an AMP group) to specific Tyr resideus. More than one Tyr can be adenylylated on the enzyme, and the number of adenylylated Tyr residues is called the degree of a..
What is meant by energy coupling? Which molecule is most commonly used in energy coupling? Discuss enzyme and catalyst
The ability of urea diffusing across membranes of red blood cells. I was told that urea can easily penetrate the membrane as they are not present in high concentration inside the cell.
What type of cells emphasizes mainly glycolysis for ATP production. What is the biochemistry of acidic and alcoholic fermentation?
Who is the story about? What is he or she trying to do. What happens while he or she tries to do it? What happens in the end.
A Drosophila cross is carried out with a female that is heterozygous for both the y and bb mutations. Both genes are located in the X chromosome.
Madagascar, Indonesia and the Amazon basin have some of the greatest numbers of different species concentrated in a single area. What kinds of environments do you think encourage greater biodiversity.
A man and a woman who each have wild type phenotypes have a son with Klinefelter syndrome who has hemophilia. Determine the genotypes of the parents?
A seven cm potato sliced is placed into an unknown solution. After the slice is immersed for one hour, the potato slice now measures six cm.
Recalling a significantly emotional past event or feeling can elicit the same physiological response as the original event.
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