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Q1. Explain why both copies of the tumour-suppressor gene must mutate but only one copy of the proto-oncogene.
Q2. If a flake of biotitic within a sedimentary rock (suck as sandstone) is radio metrically dated, the date obtained indicates when?
Q3. Animals always want to get the most from their resources by increasing the surface area throughout their organ systems. Please cite five examples and how it does this.
q1. ebv infects b cells and some epithelial cells. ebv enters via the cd21 part of b cell coreceptor.the atypical
Explain this dosage strategy in terms of the negative feedback control of cortisol secretion and receptor function in hormonal pathways.
Enzymes are typically required to catalyze reactions that would be very unlikely to occur on their own. Suppose that the activation energy, Ea, for the uncatalyzed cheese reaction at 20C is 18kcal/mol.
Construct a dichotomous key diagram with the following species of bacteria using gram stain and morphology?
Give 2 factors each, which have contributed specifically to the transition between the curves 1 and 2 and 2-3.
Assume that galactosemia, albinism, and total color blindness are all due to recessive? Assume that galactosemia, albinism, and total color blindness are all due to recessive alleles.
Compare & contrast the formation & function of the alpha-helix and the beta-pleated sheet with respect to.
From your text, lecture, or your experience list two medical examples og how ultraviolet light is used to control microorganisms?
Define frequency-dependent selection. Can it result in the stable coexistence of two or more alleles at the same locus over several generations ? If you answered yes, give an example and explain how the equilibrium is maintained; if you answered n..
A marine biologist has dredged up an unknown animal from the seafloor. Describe some of the characteristics she must look at to determine the phylum to which the animal have to be assigned.
What happens to the chromosome number comparing the beginning and end of meiosis, and why is this essential to the survival of sexually reproducing organisms
Most of us can't even imagine a world without oxygen. Though, as you learned earlier, chemically oxygen is a powerful oxidizing compound. What effect(s) would the increase in oxygen levels of atmosphere have on the organisms that existed at that time..
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