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Why would predator population growth lag behind prey population growth? If the predator population is removed and the prey population growth continues on the same boom and bust cycle, how would you explain this?
A student attempts to transform a population of E. coli with a pBluescript plasmid. How do you advise him to identify cells that have the plasmid? Answer Plate the cells on a medium containing X-gal.
Determine which do you think would have the most serious effect, and why: a 5 mEq/L increase in the plasma concentration of sodium, potassium, chloride, or calcium?
Describe the structure of a typical operon. How many genes are found in an operon?
Using the Nernst equation (V=58 log [C1] [C2]) and assuming solution 1 is 100 mM and solution 2 is 33.3 g/mol, determine the membrane potential V.
Explain how the number of glucose carrier proteins in the membrane in PhysioEx exercise 1 activity 2 affected the rate of glucose transport. Why does this occur.
A patient with hypothyroidism presents with low T3 and T4, and elevated TSH & antibodies to thyroglobulin. The thyroid is infiltrated with lymphocytes that have replaced large part of thyroid.
A class of environmental science students decided to determine the composition of trees in a forest next to their campus. The students decided to conduct a point-quarter survey.
Lysozyme was assayed at bacterial cell wall, = 2.5x10-8 g. The Km for the substrate = 6x10-3g. At the end of one minute 2.5% of the cell wall hydrolysed.
What ethical issues might arise when a drug company funds trials of a new drug it has developed to treat a genetic disorder?
How is the lifestyle of many radially symmetrical animals different from that of bilaterally symmetrical animals? Explain how the body plan complements the lifestyle using two animals as examples.
Which compartments of a cell is associated with each of the following: clathrin, calcium ions in a skeletal muscle cell, dolichol phosphate, ribonuclease and lipase, digitalis, LDL receptors, COPI proteins, COPII proteins, unbound SRPs.
Red blood corpuscles do not have a nucleus, but they are eukaryotic cells. Discuss the possible reasons as to why they lack a nucleus and the merits and demerits of this adaptation.
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