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Two Questions: What, if anything, is wrong with the following statement: "When NaCl is dissolved in water, the water molecules closest to the ions will tend to orient themselves so that their oxygen atoms point toward the sodium ions and away from the chloride ions."
The drug thalidomide was once prescribed as a sedative to help with nausea during the early stages of pregnancy. One of its optical isomers, (R)-thalidomide, is the active agent responsible for its sedative effects. It was synthesized, however, as a mixture of both optical isomers - a not uncommon practice that usually causes no problems. Unfortunately, the other optical isomer is a teratogen that led to a horrific series of birth defects characterized by malformed or absent limbs. On the structural formula in panel A, identify the carbon that is responsible for its optical activity (its chiral center) and sketch the structure of the teratogenic form of thalidomide.
Define blood pressure. Differentiate between systolic and diastolic blood pressure. What is "normal" blood pressure for a young adult?
The water appears to be contaminated with radioactive waste. This has resulted in a highly accelerated mutation rate of 1/100 "A" alleles mutating to an "a" allele every generation.
What is adaptive radiation? A) Evolution of diverse species from a common ancestor B) Evolution of diverse species on introduction to new environmental opportunities C) A species exploits many new environments leading to formation of many new spec..
The AB type toxin causes the paralysis of muscle by inhibiting the release of neuro transmitter at the synapse between the nerve cell and the muscle fiber a. Endotoxin b. Exotoxin c. All of the above
In malignant hyperthermia, a person develops a life threatening high fever after taking certain types of anesthetic drugs. DNA sequencing of individuals with the disorder showed that in position 33 A nucleotide is substituted by G, in 513 - C by T..
Assuming that the distance between the corneal surface and the retina is 5 cm in an ostrich and that the refractive power of the ostrich's lens is 5 diopters.
Chooses the statement that best describes a buffer. A buffer prevents pH of a solution from changing while an acid or base is added.
What is the role of water in promoting health? What are some health issues a person can develop from chronic dehydration? What is the long-term outlook for individuals on a fast-food diet in terms of longevity and quality of life? Why are micronutri..
Explain the function of acetylation on the histone tails. What do you think would happen if you mutated the lysine amino acid on the tail of a histone protein
consider two imaginary cells. both are cube shaped the same dimension in all directions. the first cell has a side
Why are direct gram stains ordered on clinical specimens? Why is a direct gram stain performed on all anaerobic cultures, even if it is not specifically ordered by the physician? Why is a gram stain performed on all CSFs?
Assume that, during biological research, it became possible to incorporate fully functional chloroplasts into the basal layer of our epidermal skin cells. Knowing the structure and function of chloroplasts, how will this influence our body.
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