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A cell's progression through the cell cycle requires the activity of several cyclin-dependent kinases. What are these cdks, how are they activated, how are they inactivated, when do you see their levels rise and what are their targets? How does this activity regulate the cell cycle? Explain in detail
The number density of atoms (mostly hydrogen) in interstellar space is about 10 per cm3, and the temperature is about 100K. a. Calculate the pressure of the gas in interstellar space, and express it in atmospheres.
Calculate the Ki for a competitive inhibitor whose concentration is 6.5x10-5M that increases the Km of the substrate
The ionization energy for sodium is 496 kJ/mol. The electron affinity for chlorine is -349 kJ/mol. Use these values and Hess's law to calculate the enthalpy for the following reaction: Na(g)+Cl(g) -> Na+(g) + Cl-(g)
Barium sulfate is a very insoluble compound. Please give reasons for compounds like barium sulfate or barium phosphate to be insoluble
The degree of ionization of a 0.1M bromo acetic acid solution is 0.132. Compute the ph of solution and the pKa of bromo acetic acid
Background: If aqueous NaOH is added to tert-butyl chloride acetone solution, initially the solution is basic due to the hydroxide ions from the NaOH.
Beta-carotene is organge. This means it absorbs blue lgiht. It has conjguated systme which allows the pi-electrons to delocalize over teh length of the molecule.
Will DNA replication process always create identical strands? Why or why not? What would the consequence of a "mistake" be?
At -12.0^degrees C (a common temperature for household freezers), what is the maximum mass of sorbitol (C6H14O6) you can add to 1.00 kg of pure water and still have the solution freeze? Assume that sorbitol is a molecular solid and does not ionize..
The normal boiling point of ether is 307.8 K. Calculate the temperature at which its vapor pressure is exactly half of that at its normal boiling point.
If 200 mL of 0.300 M Cr(NO3)3(aq) is added to 100 mL of 4.0 * 10^-4 M NaF(aq) at 25 degrees celcius, will a CrF3 precipitate form? For CrF3 in water at 25°C, Ksp = 6.6 * 10^-11.
Explain why is it important to maintain a constant temperature in this experiment. electrophilic aromatic substitution lab
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