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A student wants to determine the density of a pine cone. He weighs the cone and prepares to find its volume. He submerges the pine cone in a graduated cylinder filled with water and records the water level. He realizes he forgot to record the initial water level of the graduated cylinder. Because he wants to get done with the lab, he removes the pine cone and records the water level. He uses this water level as the initial water level when he calculates density. Will his calculated density differ from the true density? If so, how and why?
Identifying modes of thermoregulation.
The mitochondria a of mutant yeast strain is discovered to oxidize NADH even in the absensce of ADP. How would the P/O ratio of this mutant compare to the wilfe type?
State the rate of growth of population of bacteria? State the initial population at time t = 0 hours?
Suppose that the cells grow to about 10^5 cells per squre cm and contain about 10pg RNA per cell, determine the theoretical yield of RNA from one of your samples.
Calculate the heat necessary to convert 10.0 grams of solid benzene at its melting point to vapor at its boiling point. The specific heat of liquid benzene is 0.580 cal.
If your grandfather is a carrier for a rare recessive disease called biology and you know your grandmother and mother, who have married in to your family are NOT carriers,
If the total free energy of the system X+Y X-Y at 37 C is +6700 J/mol and the total entropy change is -125 J/mol K, what is the total enthalpy change? Also, is the problem endothermic or exothermic and endergonic or exergonic.
The alarm calls produced by an individual female Belding's ground squirrel result in a 50 percent reduction in its survivorship due to increased predation risk.
Describe how nucleic acid hybridization studies are carried out using membrane-bound DNA. Why might one wish to vary the incubation temperature during hybridization?
explain How will the net charge of a typical protein change.The table below indicates approximate values for these at 25C. For reference, the delta H(ionization) for Tris is 47kJ/mole.
A 20-year-old female presents to your emergency service with severe head trauma from a fall. An MRI reveals swelling of her brain, but no sign of hemorrhage.
From a bacteria stock you serially dilute 1/100 two times, then serially dilute 1/10 two times. From this last tube you plate 100 ul, which produces 156 colonies the other day.
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