Vitamin D is produced in the skin when 7-dehydrocholesterol reacts with UVB rays (ultraviolet B) having wavelengths between 270 nm and 300 nm. What is the energy range Emin < E < Emax of the UVB photons? Emin = Emax = J
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- Vitamin D is produced in the skin when 7‑dehydrocholesterol reacts with UVB rays (ultraviolet B) having wavelengths between 270 nm and 300 nm. What is the energy range ?min≤?≤?max of the UVB photons?A 75 kg person doing light work requires about 3000 kcal of food energy perday, 40% of which is actually used by the body’s cells. (The other 60% is lostas heat and in waste products.) Before being used by the cells, effectively allof this energy is stored in ATP, which is then cleaved into ADP and PO3−2 , with the release of 12.5 kcal per mole of ATP.(a) How many moles of ATP are turned over per day in this fashion? Whatmass of ATP does this correspond to? (The molecular weight of ATP is507 g/mol.)(b) The body actually contains approximately 5 g ATP. Estimate the averagerecycle time for an ATP molecule. You see that it is much more efficientto reuse ADP rather than to synthesize it de novo (from scratch).Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water that you drink may eventually be converted into sweat and evaporate. If you drink a 20-ounce bottle of water that had been inthe refrigerator at 3.8 °C, how much heat is needed to convert all of that water into sweat and then to vapor?? (Note: Your body temperature is 36.6 °C. For the purpose of solving this problem, assume that the thermal properties of sweat are the same as for water.)
- If we wipe Vitamin C on the skin and then (around 5 min.) wipe Niacinamide on the skin, what's bad result can be occurred on the skin (for example, it react together and cause Niacinamide in to Niacin form)Cyanide causes an irreversible inhibition of electron transport that prevents ATP synthesis, whereas the inhibitoryeffect of small amounts of dinitrophenol on ATP synthesisis reversible. Explain the difference.Which of the following is not produced by an animal muscle cell operating under anaerobic conditions? a. heat b. pyruvate c. PGAL d. ATP e. lactate f. oxygen
- A mitochondrion 1 μm long can travel the 1 meterlength of the axon from the spinal cord to the big toe in aday. The Olympic men’s freestyle swimming record for 200meters is 1.75 minutes. In terms of body lengths per day,who is moving faster: the mitochondrion or the Olympicrecord holder? (Assume that the swimmer is 2 meters tall.)One of the most significant sources of thepollutants that contribute to photochemicalsmog is exhaust from automobiles. Hydrogencell cars run on hydrogen and electricityand emit only water. Do you think thatthe government should provide strongincentives, such as tax breaks, for peoplewho pay extra for these cars?We have described the molecule ATP as the body’s energystorehouse. What do we mean by this designation? Howdoes ATP actually store energy and provide it to the bodyas needed?
- What should be the minimum specification of a spectrophotometer that will be used to determine the absorption maximum (???? ) of any compound? What could be possible outcomes if a compound is not measured in the wavelength of its ????? I'm having a hard time researching about this.Attached references are much appreciated.A vibration through a material medium that can carry energy but not matter it's aFor dinner you eat 2 slices of a 14" thick crust pizza. Each slice contains 311 Cal. How many minutes would you have to swim to burn the amount of calories in those 2 slices of pizza if you burn 500 kcal/hr swimming? Round your answer to the nearest tenths place.