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If a lipid raft is typically 70 nm in diameter and each lipid molecule has a diameter of 0.5 nm, about how many lipid molecules would there be in a lipid raft composed entirely of lipid? At a ratio of 50 lipid molecules per protein molecule (50% protein by mass), how many proteins would be in a typical raft? Explain. (Neglect the loss of lipid from the raft that would be required to accommodate the proteins).
A. 19,000 lipid molecules, and 380 proteins.
B. 38, 000 lipid molecules and 760 proteins.
C. 9,500 lipid molecules, and 190 proteins.
D. 72,000 lipid molecules, and 1520 proteins.
What is/are true of the polymerase chain reaction? a. PCR permits scientists to target a single copy of a single gene among millions of other sequences. b. PCR cannot be used to clone DNA of unknown sequence.
Are the shape and size of bonsai trees the result of natural selection or are the shape and size the result of the manner in which they have been managed?
Describe why it may be too simplistic to label disease-causing alleles as "bad" and corresponding "normally" functioning alleles as "good."
Do you think that using recombinant DNA technologies to change the genetic composition of human egg cell is ever justified? If so, what restrictions have to be placed on such a use.
as both starch and cellulose are chemically identical chains of glucose, what is the structural difference between the two polysaccharides?
What step in the RT mechanism controls the rate at which RT can proceed at incorporating the dNTPs.
Metallic magnesium has a hexagonal close-packed structure and a density of 1.74 g/cm 3 . Suppose magnesium atoms to be spheres of radius, r.
A mutation occurs in the lac repressor protein such that it can no longer bind to allolactose. What effect will this mutation have on expression of proteins of the lac operon in the presence of lactose?
Name the technique used to increase a quantity of DNA?
You have a constitutive mutant, but you are not sure if it is constitutive due to a repressor mutation (i-) or an operator mutation (o^c). What would be a good experiment to determine whether the phenotype is due to a defective repressor (i-) or t..
Why should you always include antibiotics in the medium when cultures are grown for plasmid isolation?
Filling out two Punnett squares for a cross between a male with blood type B and a female with blood type AB. Build two Punnett squares and answer the following questions about them.
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