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To do molecular biology studies of DNA, one must develop methods to extract it. The extraction of DNA can be very complicated because of the structural and chemical complexity of cells.
CA2+, IP3, and cAMP have all been described as second messengers. In what ways are their mechanisms of action similar? In what ways are they different.
A batch animal cell culture has a productivity of 1.8 g/L*day, with a MUmax=0.5 days, a 10% inoculums and a turnaround time of 5 hours. If a continuous culture could operate at a dilution rate of 90
If I had a body mass of 56 kg how would I get an estimate of my total body weight? I need a full calculation and what the method is called. Also, I have read that D2O IS used in some experiments to
A friend of yours has just received a new dietary supplement purchased online.
Carbonic anhydrase of red blood cells, which has a molecular weight of 30,000, is among the most active known enzymes. It catalyzes the reversible hydration of CO2, which is important for the transp
Calculate the change in G value for the reactions: (include change in Energy in the answer).
A deep space probe is traveling at a velocity of 18.8km/s. What is its velocity in miles/minutes.
In one day the average person secretes about 2.5 litres of gastric juice into the stomach. The pH of the cells in the stomach lining that perform the secretion is about 7 (the same as for all cells)
A major difficulty in investigating the properties of pancreatic serine proteases is that these enzymes, being proteins, are self digesting. The problem is less severe for solutions of chymotrypsint
In order to determine the major pathway of glycine degradation, you devise an experiment in which mice are fed 13C(alpha)-labeled glycine.
Estimate the amount of energy a mammal can obtain from the oxidation of palmitate, in the liver under conditions of ketosis, relative to the amount obtainable under conditions of a balanced diet wit
When bacteria growing at 20 degree celsius are warmed to 30 degree celsius, are they more likely to synthesize membrane lipids with.
A bacterium is in the process of acclimating to a lower temperature environment. How would you expect the fatty acid complement in the bacterial membrane to change in response to the lower temperatu
What is the purpose of ferementation after glycolysis.
Patients in shock experience decreased delivery of oxygen to tissues, decreased activity of the pyruvate dehydrogenase complex, and increased anaerobic metabolism. Excess pyruvate is converted to la
Suppose that the Nernst potential (across a neurons plasma membrane) for Mg(2+) is a 100+ mv. Calculate the fold concentration gradient for magnesium and explain in which direction it lies across th
What are the clinical scenarios. What are the clinical scenarios.
The amino acid sequence shown below represents a portion of a peptide bond obtained from a large protein.
What Intracellular second messenger is the primary regualator of the physiological response of photoreceptors to stimulus.
explain the impact of cycle on typical resting membrane potential.
Which non covalent interactions are most likely to be important in protein-protein interactions in aqueous environment.
what are the 6 atoms that are coplanar due to the resticted rotation about the peptide bond.
If I had 1L of a 1.0M solution of glycine at the isoelectric pH (6.02) and I added 0.3 mol of HCL, what would be the new pH? What would be the pH if I added 0.3 mol of NaOH instead of the acid.
what fraction of these groups will be protonated in a dilute solution of lysine at pH9.5