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calculate the amount of DNA present in your sample if the absorbance at 260 is .3 (remember that an absorbance of 1.0 at 260 means the sample has 50 ul/ml of double-stranded DNA?
What veins are most likely involved? What pathologic changes have happened in these veins, and what is the most probable cause in this patient's case.
Huntington disease is a rare dominant train auses neurodegeneration later in life. A man in his 30, who already has 3 children discoers his mother has huntingtons disease.
Assume y ou wish to use PCR to sequence a particular gene that you have isolated. The sequencing protocol suggests that you use 3.2pmole (pico moles) of your primer in a 2 micro liter volume.
Explain why are ripe fruits often colorful, fragrant and sweet? Determine the difference between pollination and fertilization in flowering plants?
How to calculate the resolution possible for a microscope given the wavelength and numerical aperture.
Explain the events that occur when epinephrine binds to a G-protein coupled receptor in the membrane of a cell. Begin with the binding of the epinephrine and end with the activation of adenylyl cyclase.
This one requires that you think about what limits the respiration rates in states IV, III, and in uncoupled mitochondria. Which of the following situations should produce the fastest rate of respiration? Let the substrate be the same in each case..
Which of the following hypotheses is consistent with the observed correlation between tRNA abundance and codon usage in highly expressed genes.
explain the feedback mechanism that maintain homeostasis and give two specific examples of what happen when homeostatic control systems do not function properly.
find examples of countries for each population growth model (rapid, slow, zero). Use examples other than the ones described in the text or the lecture. What evidence can you find to support your choices?
The effects of water loss on the water budgets of lactating female mammals in arid environments are not well understood. Specify a hypothesis regarding mechanisms by which females might prevent water losses in their milk from forcing them into neg..
The incidence of most cancers increases with age in a non-linear fashion. Assuming that the rate of mutation is constant throughout life, why do you suppose the incidence of cancer increases so dramatically with age?
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