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A. You need to make a dilution of a stock solution of sodium chloride.
The stock solution on your shelf has a concentration of 1M. You need 100ml of a 0.1M dilution. Using C1V1 = C2V2, calculation how much stock solution and how much water you need to pipette to make your dilution.
B. You separate pigments A and B using paper chromatography.
• A travelled 4mm
• B travelled 2mm
• Solvent travelled 10mm
Calculate the Rf of pigments A and B.
You know the pigments have different solubility in the solvent. Which pigment (A or B) likely has higher solubility? Briefly explain why
A lab is working on drugs that disrupt cell division and have created drugs that inhibit DNA replication in tumor cells. You, being a curious grad student want to test each drug and figure out which DNA replication enzyme it targets.
Insulin increases glucose transport across the cell membrane of an adipocyte but not across the membrane of a liver cell. How can one hormone have two different effects?
Discuss the relative convenience of pour- and streak-plate techniques in culturing clinical specimens. Define a selective medium and describe its uses.
An enzyme and its substrate are combined in a test tube but no product is formed. Another molecule is added to the tube, and now the product is formed at the normal rate. Give 2 reasons.what type of inhibition is working on the substrate.
Next discuss two functions of mitochondria and why you believe each of these functions is important. Then explain two ways that the inability of mitochondria to perform their proper function can account for mitochondrial disease symptoms.
An 11-year-old boy presents to the emergency room (ER) with a 4-inch laceration on his right arm. He was with his friends doing bicycle stunts.
Describe how the liver participates in digestion.
What is the functional relationship between the nucleus and the rough endoplasmic reticulum?
Most people with Broca's aphasia suffer from partial paralysis on the right side of body. Most people with Wernicke's aphasia do not. Why.
Describe the roles of the different subunits of the E.coli RNA polymerase. How do each of them interact with the other polymerase subunits
What threat to internal validity negates the value of this finding, and what can you do to remedy the situation?
Can you describe the pathophysiology that contributes to low hemoglobin and hematocrit in a hemodialysis patient please?
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