What is LogD?
a) LogD indicates the distribution of the drug in the cell
membranes
b) LogD describes the drug as ionic and non-ionic
water solubility of the form
c) LogD is the ionic and non-ionic form of the drug
Partition coefficient between fat and aqueous phases
d) LogD is the same as LogP but declares
partition coefficient at a given pH.

What is LogD? a) LogD indicates the distribution of the drug in the cell membranes b)...
Steroids are considered to be lipids because they: a) are essential components of cell membranes b) are not soluble in water c) are made of fatty acids d) are hydrophilic compounds e) contribute to atherosclerosis
2. The weak base B (Kb = 1.0 * 10-5) equilibrates between water (phase 1) and benzene (phase 2). (a) Define the distribution coefficient, D, for this system. (b) Explain the difference between D and K, the partition coefficient. (c) Calculate D at pH 8.00 if K = 50.0,(d) Will D be greater or less at pH 10 than at pH 8? Explain why.
2. The weak base B (Kb = 1.0 * 10-5) equilibrates between water (phase 1) and benzene (phase 2). (a) Define the distribution coefficient, D, for this system. (b) Explain the difference between D and K, the partition coefficient. (c) Calculate D at pH 8.00 if K = 50.0,(d) Will D be greater or less at pH 10 than at pH 8? Explain why.
(A) Name and (B) draw the head-group of the primary constituent of cell membranes. (C) What is this head group charged at physiological pH? (3 pts) 2) Explain how single nucleotide insertions and deletions could be used to provide evidence that the genetic code is a triplet code. (2 pts)
1. )An aqueous drug solution was prepared in a hospital pharmacy and the shelf-life is known to be 7 days when the solution is stored at room temperature (25oC). By using rule of thumb, estimate the shelf-life when the solution is stored at 15oC (cold room) (a) 17 days (b) 14 day (c) 5 days (d) 18 days (e) None of the above 2.) You have the assignment to prepare a water soluble injectable of atropine sulfate (pKa = 4.35)....
1. The fluid mosaic model describes cell membranes as consisting of A) a phospholipid bilayer with embedded carbohydrates B) two layers of phospholipids with protein sandwiched between them C) a protein bilayer with embedded phospholipids D) carbohydrates, proteins, and phospholipids that can drift in the membrane E) individual proteins that can drift in a phospholipid bilayer 2. When a poison, such as Paraderil found in flea dip, blocks the electron transport chain, the citric acid cycle soon grinds to a...
Toxicology
1) The toxicants pass through the cell membranes by what is known as, "passive diffusion" which depends on (a) pore size (b) concentration gradients across the membrane (c) lipid solubility (d) the diastolic and systolic blood pressure in the individual 2) In toxicokinetics the rate of elimination of administered substances is measured from the area plots of concentrations versus time. Among the following substances which one would you expect to be excreted out at the slowest rate? (a) glucose...
SOLUTIONS 22. Non-polar compounds are soluble in ionic compounds b) electrolytes c) polar solvents d) non-polar solvents 23. Which of the following would increase the solubility of gaseous O2 in water? (there is more than correct answer, mark them all!) Decreasing the temperature of the solution Increasing the temperature of the solution Decreasing the pressure of the solution Increasing the pressure of the solution 24. Which of the following describes an unsaturated solution? A solution that has less than the...
Which statement is not true? A) Lipids are found in cell membranes. B) Lipids are soluble in organic solvents. C) There are many different types of lipids. D) All lipids contain fatty acids. E) Some hormones are lipids. The overall three-dimensional shape of a protein is determined by its ___and is known as the _ structure of a protein. 1. a) amino acid residues/primary 2.b) amino acid residues/tertiary 3.c) isoelectric point/secondary 4. d) hydrogen bonding/secondary Which is a means that...
Glycoproteins and glycolipids on the surface of cell plasma membranes determine interactions between cells. What type of chemical bond is most probably used to connect the carbohydrate molecules to the protein or lipid molecules? a. peptide bond b. glycosidic bond c. ester bond d. hydrogen bond e. amide bond