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Q. A baby hamster kidney (BHK) cell has the surface area of 3,400 micrometres². Assume that the endocyte clathrin-coated pits account for 2 percent of this area and that surface area of a single coated pit is the same of that of a 100nm diameter clathrin coated vesicle that will be formed from it. If the cell surface has 100,000 transferrin receptors, around 70 percent are localised within coated pits, work out the follow-
If a transferrin receptor has a cross-sectional area of 50 Angstroms X 100 angstroms (5x10nm), and how many receptors could be accomodated in a 100nm clathrin-coated vesicle assume that only 50% of surface area can be occupied by proteins?
the area fraction associated with membrane protein in the RBC (diameter = 8 micrometer) membrane is roughly 23% while the lipids take up 77%.
What is a hypothesis for: How will increasing the number of yeast cells affect the rate of ATP production by the cells (in moles ATP/hr) if the sugar concentration in the experiment is held constant?
A bacterial operon encodes enzymes needed to synthesize ahypothetical protein, Snk. When a second gene, mck, is mutated, nosnk is transcribed even in the presence of inducer. In the thirdgene, ops, mutation leads to constitutive Snk production. Ho..
Discuss the purpose of the immune system is to recognize foreign bodies and respond with the production of immune cells and proteins.
How many distinct molecular mechanisms might be responsible for converting a proto-oncogene into a potent oncogene?
Discuss hemoglobin relative to its chemical structure, its function, and the color changes it undergoes during loading and unloading of oxygen.
Thiol proteases are a widely distributed group of proteases with a mechanism somewhat similar to that of the serine proteases (the family of enzymes which includes chymotrypsin).
sketch the chromosomes of the parents and the F1. analyse interference and say what you think of its significance.
Which of the following is NOT part of the extracellular matrix?
explain how an illness with a fever could affect the digestive system of a human, and why the body would produce a fever if there are negative side effects.
Describe the relationship between the amount of O2 consumed and time. Why is it necessary to correct the pea readings with the bead readings?
Many of the major waterways in the Tennessee River system are dam-controlled. That means the water level of each section of river may fluctuate significantly at different times of the year. This makes the deployment of Reef Balls in the Tennessee ..
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