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The osmotic pressure of a 0.9 weight percent solution of sodiumchloride (NaCl) is equal to the osmotic pressure of a 5 weightpercent solution of non-dissociating molecule X. What is themolecular weight of molecule X? The molecular weight of NaCl is58.5 g/mole (assuming 100% dissociation of NaCl in solution). Thewater density is 1 g/ml.
while short necked giraffes have an average of 2 young. WHat are the relative fitnesses of these two types of giraffes?
The UV absorption in proteins at 280 nm is largely due to tryptophan residues. The molar extinction coefficient of tryptophan is 5380 M-1cm-1. Exactly 0.25 g of a protein is dissolved in 200 milliliters of a neutral buffer.
Compare and contrast the mechanisms of transcription initiation in prokaryotes and eukaryotes. Suppose you were to count one coliform colony produced from a 10 ml water sample.
Lysozyme was assayed at bacterial cell wall, = 2.5x10-8 g. The Km for the substrate = 6x10-3g. At the end of one minute 2.5% of the cell wall hydrolysed.
In plant communities today, leaf morphology is correlated with mean annual temperature, so paleobotanists use fossil leaf morphology to estimate the mean annual temperature of paleoclimates.
For vegetarians, acquiring essential amino acids is important in preventing protein deficiency. What is the difference between essential and nonessential amino acids? How can vegetarians combine protein from different food sources to ensure the..
Through fruit fly studies, geneticists have discovered a segment of DNA called the homeobox which appears to control: a. Sex development in the flies b. Life span in the flies c. Final body plan development in the flies.
Determine which of the following groups can be involved in hydrophobic interactions?
Which parts of atoms can interact (react) to form chemical bonds? a.) valence electrons b.) protons c.) the nucleus of each atom d.) the orbitals.
The physical process through which water and solute move through a membrane when hydrostatic pressure gradient exists across the membrane is the process of?
All neurons are neural tissues, but not all neural tissues are neurons! Identify and discuss the roles of our different neural tissues, giving practical examples with respect to location and function as you go!
The CAP activator protein and the Lac repressor both control the Lac operon. You construct cells that are mutant in the gene coding for the Lac repressor.
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