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Ethanol in the body is oxidized to acetaldehyde by liver alcohol dehydrogenase(LADH). Other alcohols are also oxidized by LADH. For example,methanol, which is mildly intoxicating, is oxidized by LADH to thequite toxic product of formaldehyde. The toxic effects of ingestingmethanol (a component of many commercial solvents) can be reducedby administering ethanol. The ethanol acts as a competitiveinhibitor of methanol by displacing it from LADH. This providessufficient time for the methanol to be harmlessly excreted by thekidneys. If an individual has ingested 100 mL of methanol (a lethaldose), how much 100 proof whiskey (50% ethanol by volume) must beimbibed to reduce the activity of his LADH towards methanol to 5%of its original value? The adult human body contains ~40L ofaqueous fluids throughout which ingested alcohols are rapidly anduniformly mixed. The densities of ethanol and methanol are both0.79 g/cm3. Assume the KM values of LADH for ethanol and methanolto be 1.0 X 10-3 M and 1.0 X 10-2 M, respectively, and that Ki = KMfor ethanol.
In the year following the fires, wildflowers sprouted in all burned areas, closely followed in subsequent years by seedlings of the trees that normally grow in the area, such as aspens and lodge poles pines. What changes in the Ecosystem will take pl..
Organ transplant recipients are given immunosuppressive drugs post transplantation. This treatment continues for the rest of their lives to prevent organ rejection.
For a certain malformation, the recurrence risk in sibs and offspring of affected persons is 10%, the risk in nieces and nephews is 5%, and the risk in first cousins is 2.5%.
The mediam molecular weight of eukaryotic proteins is about 40,000 daltons. A few proteins are much larger, such as a muscle cell protein called titin, which has a molecular weight of 3,000,000 daltons.
Think about the nature of negative-feedback control and the function of the respiratory system, what effect do you predict that a decrease in CO2 in the internal environment would have on how rapidly and deeply a person breathes?
Import or export of solutes (chemiosmotic work) turning the flagellar motor (mechanical work) Synthesizing ATP via the F0F1 ATPase (chemical work; discussed next lecture) how is this energy generated or replenished.
The standard Gibbs energies of formation of gaseous cis- and trans-2-butene are 67.15 kJ mol^-1 and 64.10 kJ mol^-1, respectively.
what are some substances that move through the membrane through facilitated diffusion? what properties do they have in common?
Write a 200- to 300-word reflection describing brain lateralization and its role in language.
In 2004, 45% of the corn, 85% of the soybeans, and 76% of the cotton grown in the United States was from genetically modified (GM) seeds. According to The New York Times, most Americans have probably eaten some food derived from GM corn or soy.
angiosperms flowering plants are the largest phylum in the plant kingdom plantae. note that the phylum angiospermophyta
Imagine that you have been studying the population biology of ground squirrels on the UCSC campus for a number of years and have obtained the following information.
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