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1. Which of the following is true of the evolution of cell membranes?A) Cell membranes cannot evolve if proteins do not.B) The evolution of cell membranes is driven by the evolution of glycoproteins and glycolipids.C) An individual organism selects its preferred type of cell membrane for particular functions.D) As populations of organisms evolve, different properties of their cell membranes are selected for or against.E) Cell membranes have stopped evolving now that they are fluid mosaics.
2. Of the following functions, which is most important for the glycoproteins and glycolipids of animal cell membranes?A) facilitated diffusion of molecules down their concentration gradientsB) a cell's ability to distinguish one type of neighboring cell from anotherC) maintaining membrane fluidity at low temperaturesD) active transport of molecules against their concentration gradientsE) maintaining the integrity of a fluid mosaic membrane3. Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?
A) CO2B) an amino acidC) K+D) starchE) glucose
leucine has two dissociable protons: one with pKa of 2.3, the other with a pKa of 9.7. Sketch a properly labeled titration curve for leucine titrated with NaOH; indicate where the pH = pK and the region(s) in which buffering occurs. Draw which str..
How can altering ice nucleation protein production yield a bacterial strain useful to agriculture? Explain the logic and how this works.
What is the effect of carbon on temperature change and climate change ?
Syed is a body builder. He is concerned about his protein intake. If Syed weighs 200 pounds and consumes about 3600 Calories/day, 15% of which comes from protein, will his diet supply enough protein to meet the recommendation for strength athletes..
Describe the structure of eukaryotic chromatin and how this structure must be remodeled for transcription to occur. You must understand the role of histones, histone modifications, DNA modifications and DNA binding proteins.
Suppose that you have 1M stock solutions of NaCl, KCl, and CaCl2. If the ion concentrations in human plasma are 120 mM Na+, 12mM K+, and 2 mM Ca+.
In the oxidative phase of the pentose phosphate pathway, energy is extracted from glucose 6-phosphate to produce NADPH and yield ribose 5-phosphate.
In a population of 100 Walruses, 30 have short whiskers (the recessive trait). The rest of the walruses have long whiskers (the dominant trait) with 30 heterozygotes.
Determine the Surface Area (cm sq) and volume (cm cu) of the following three cubes.
In the signal transduction lecture, we established that the BCR-ABL translocation creates a membrane bound receptor with constitutive kinase activity. What defect is associated with this oncogenic mutation
q1. why is it that i feel so tired right after eating a big meal except have a bunch of energy about 2 hours after a
Explain how many kinetochores are there within the human cell at mitosis? Surprise, your boss has invited himself or herself to dinner! All you have is some wilted, day old lettuce.
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