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A particular cell type has an average of 2000 receptors of a specific type. You have a culture of these cells, which you expose to the specific ligand for the receptor in question. After an hour, you analyze the cells in culture and you find that the average number of receptors is now 1,200. What do you think happened to explain the decrease in the average number of receptors? Why would this occur?
The structure and composition of glycoproteins determines the A, B and O blood groups in humans. Explain how this happens and draw the structure of carbohydrates attached to the blood antigen O in the Haworth projection, showing the correct glycos..
Create the process of initiation of translation, keeping in mind the molecules needed for translation. What regulates the proper positioning of the ribosome during initiation of translation?
After learning the concepts of dry matter and as fed, you realize you have been spending a lot of money on canned dog food and want to switch to dry food for your pet.
Briefly explain why digester sludge accounts to 5-10 percent of the total flow but contains 25-30 percent of the organic nitrogen.
Hypothesize how recombination might adversely affect the functioning of an operon such as the lac operon or the trp operon. What might be the metabolic implications for an E. coli cell that experiences a disruption of one of these operons?
Using the respirometer-manometer, you observed the amount of oxygern being used by animals in a closed chamber. What happened to the carbon dioxide the animals produced while in the chamber?
In a separate piece of paper, make a simple family tree for a couple showing children, and lineages from two children showing grand children, great grandchildren, great great grandchildren, and great great great grandchildren.
What are the four major arthropod phyla living today? which one contains the insects,and which the spider,and which the centipedes?
Tay Sachs disease is inherited as an autosomal recessive. It is a devastating neurological disease that results from the lack of a normal enzyme "A" whose job is to metabolize lipids that are found in brain cells.
The new antibiotic cubicin works by creating a passive transport channel for H+. Obviously this would affect the PMF, but other cell processes may be disrupted as well. How would treatment with cubicin affect flagellar motility and chemotaxis.
What is the major morphological difference between mammalian red blood cells and avian red blood cells? Describe what is happening in plasmolysis when onion cells are placed in a hypertonic solution. Sketch a plasmolysed cell.
in Kansas, a farmer is growing a variety of wheat called TK138. He calculates the narrow sense heritability for yiels (the amount of wheat produced per acre).
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