1. The pK1, pK2, and pKR of the amino acid lysine are 2.2, 9.1, and 10.5, respectively.  The pK1, pK2, and pKR of the amino acid arginine are 1.8, 9.0, and 12.5, respectively.  A student wants to use ion exchange chromatography to separate lysine from arginine.  What pH is likely to work best for this […]

In some experiments I have been performing upon the inheritance of eye color in Drosophila, I have identified a new autosomal recessive mutation which results in the eye color being very dark, rather than the red color of normal wild-type eyes. I named this gene claret (symbol: ca). The X-linked […]

Write a 1,050- to 1,400-word paper that includes the following: Summarize the biology of B lymphocytes from origin to surface molecules. Summarize the biology of T lymphocytes from origin to surface molecules. Analyze the reactions of T and B lymphocytes with each other as well as with other cell types. […]

1. Much pharmaceutical research targets developing anti-cancer drugs that can effectively stimulate the methylation of DNA. Formulate a possible hypothesis to explain why DNA methylation might be an effective anticancer drug. 2. Both the human and the thale cress (a small plant) genomes contain about 25,000 genes. However, human beings […]