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Whether or not cigarette smoking adversely affects bone density in adolescents is an important research question because it would also increase their risk for osteoporosis later in life. Other important determinants of bone density are body weight, physical activity, hormones, and calcium intake. In your opinion, which one's of these factors (independent variables) will have a negative correlation with bone density and which ones will have positive correlation? Please explain the reasoning for your answer.
You have recovered a strain of E. coli with a null mutation of the gene for catabolite activator protein (CAP). Which of the following do you expect to be true regarding the expression of a completely wild-type operon?
Explain the reverse transcription reaction (what are the components of the reaction? What are the possible primers for the reaction and how do they differ from each other?)
The train company prides itself on always having its train to the station within a 3% error of the expected time. will the train company live up to its reputation on this trip?
How many proteins could you fit along a 2000 bp long piece of DNA? Assume that the protein is a 3.4 nm cube and that the distance between two base pairs in a sequence is 3.4 Angstroms.
Two aqueous urea solutions have osmotic pressures of 2.4 atm and 4.6 atm, respectively, at a certain temperature.
q1. you stir 10 grams of solid glucose and 10 ml of liquid phospholipids in a 500ml beaker that contains 200ml of
You want to test whether a particular allele of the interferon gene is responsible for an immune deficiency disease. Using an assay for a restriction fragment polymorphism present in the a3 allele and absent in other interferon alleles.
Albinism is an autosomal recessive disease. Dimples are autosomal and dominant to no dimples. A normal woman with no dimples marries a man normal man with dimples.
Maraviroc is a drug designed to block the interaction between HIV attachment proteins and the host cell receptor protein CCR5, thus blocking the initial stages of viral infection.
If the epidermis is wounded (cut), epithelial cells must migrate out on the ECM of the dermis to cover the wounded area. Epithelial cells migrate through the use of transient focal adhesions.
Explain why water forms nearly spherical droplets on the surface of a freshly waxed car. Why doesn't water bead on a clean windshield?
suppose you do a kirby bauer test on a hypothetical staphylococcus species with the antibiotics penicillin and chloramphenicol. you record zone identical diameters of 25mm for the chloramphenicol and penicillin disks.
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