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In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. Which of the following crosses would produce offspring in the ratio of 1 red : 2 roan : 1 white? A. red × white B. roan × […]

1. Briefly present the most common side effects of cardiovascular drugs. Why some of them can cause electrolyte abnormalities, dysrhythmias or drug-drug interactions. Give some examples. 2. Present the rationale for clinical applications of renin-angiotensin inhibitors. What are the major side effects? 3. What is a difference between centrally acting […]

Although normal E.coli cells can synthesize all the amino acids, some mutants called amino acid auxotrophs, are unable to synthesize specific amino acids and require the addition of that amino acid to the culture medium for optimal growth. In addition to their role in protein synthesis, specific amino acids are […]

Q1. At the same time that you did the viable cell count of your bacterial culture (in problem 10), you also counted the cells in a Petroff-Hausser chamber; however, the cell count you obtained from Petroff-Hausser chamber is nearly double that obtained in the viable cell count. Based on this […]