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Assume that a spherical cell, with a diameter of 24 ?m, has spherical mitochondria, each with a diameter of 0.24 ?m. If mitochondria occupy 13.7% of the volume of the cell, how many mitochondria are there?
How might 32 P and 35 S be used to demonstrate that the transforming principle is DNA? Briefly outline an experiment that would show that DNA rather than protein is the transforming principle.
Top and bottom homologs both have 5 repeats. A cut is made in the middle of the top homolog (bottom homolog intact), after strand invasion and recombination the top homolog contains 7 repeats.
A 70-year old woman presents with a one hour history of crushing substernal chest pain. Shortly after admission, the patient expires.
Within an essay response, discuss the next concepts: an antioxidant's function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery system for vitamin C, and precautions for use of vitamin C.
For each of the following mutagens, indicate what type of mutation will be induced. Also, explain how the mutagen induces the damage.
Based on the Nernst equation, the equilibrium potential for any ion distributed across a membrane is dependent on the internal and external concentrations of the ion,
Two highly inbred strains of mice are crossed, and the FI generation has a mean tail length of 5 cm and a standard deviation of 1.5 cm. The F2 generation has a mean tail length of five cm and a standard deviation of four cm.
Just before a physiology exam her ventilation increases to 18 breaths per minute from nervousness. Now what is her total pulmonary ventilation? Assuming her anatomic dead space is 120 mL, what is her alveolar ventilation in each case?
The molecular weight of "Y" is two hundred. I use 10g of "Y" in 10mL of water. What is the molarity of this solution of "Y"? What percentage solution of "Y" is it?
Carbon cycles through the ecosystem between the atmosphere, organisms (such as producers, herbivores, and carnivores), and decomposers.
What happens to the post-synaptic cells' membrane potential at an inhibitory synapse?define why the coupling of the import of amino acids.
If an individual was unable to make the enzyme alcohol dehydrogenase they would be more susceptible to the effects of alcohol - what is the main reason a person would be born without the ability to make alcohol dehydrogenase?
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