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1. Normal cells greatly slow their rates of cell division after filling a culture dish with a layer one cell deep (a monolayer). If a circular group of cells is removed from the middle of the filled culture dish, the cells on the edges of the "wound" will begin to divide, fill the space and then stop dividing again. How does the behavior of transformed cells differ? 2. You look at two slides in the microscope. The first contains cells displaying nuclear irregularity and a scant and disorganized cytoskeleton. The second contains cells with a normal chromosomal number and a well-organized network of microtubules, microfilaments and intermediate filaments. Which, if any, contains cancer cells? Explain your selection. 3. You grow some cells in culture and measure their growth rate. You then add serum with growth factors in it to the culture medium and once again measure the growth rate. The growth rate increases only slightly. What kind of cells are these likely to be and why do you think so?
Explain how osmotic pressure and hydrostatic pressure regulate theexchange of fluid and solutes across capillaries. Why does the cell need both mRNAand tRNA in order to synthesize a protein like hemoglobin? Why does the cell need both mRNAand tRNA in..
Explain the "midgut barrier hypothesis" in mosquito borne arborviruses that accounts for different transmission rates or "competencies" among mosquito borne-viruses.
Suppose you're watching your favorite soap opera. After one ofthe main charactors is thrown from a galloping horse, she suffersfrom amnesia. What type of amnesia is she most likely experiencing?
what's the genetically based phenotypic ratio that should be hypothesized to explain the F2 data and what is the number for the degrees of freedom and what is the critical value? Round to two decimal places.
Which of the following can affect human cells? Explain whyor why not. The level of exercise that increases body's core temperatureto 39 degrees Celsius
The blood calcium level of 12mg% tends to induce. When a triglyceride molecule is broken down to glycerol andfatty acid
Some amino acids are post-translationally removed from the C-terminal end of the b-lactamase enzyme from B. imaginarium after translation and release from the ribosome.
What triggers your body to take a breath? Explain what part of the brain stimulates breathing and what aspects of body chemistry are important in controlling the rate and depth of your breathing.
A flower breeder analyzed that a cross between true-breeding red tulips and true-breeding white tulips makes all red-flowering F1 offspring.
Why do plant cells have mitochondria, but animal cells don't have chloroplasts? Give a phylogenic explanation.
Discuss how the unique physical and chemical properties of water contribute to the importance of water for life on Earth to survive. Explain the role so called "accidental" discoveries played in the history of science.
Explain how the reproductive variability of aphids might be an adaptation that allows them to survive very aggressive predation.
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