Q1. The control centre for regulating body temperature is in a region of the brain called the hypothalamus. When the body is fighting an infection, the hypothalamus allows body temperature to climb higher than the normal value of about 380C. Explain how this procedure involves both positive and negative feedback. […]

Consider two hypothetical recessive autosomal genes a and b, where a heterozygote is testcrossed to a double-homozygous mutant. Predict the phenotypic ratios under the following conditions. For parts B, C, and D the mutations are in cis. Part A: a and b are located on separate autosomes. Part B: a […]

In an anaerobic bioacter converting sewage to methane, what would be the effects of the following treatments and the resulting effects on methane production and bioacter performance over the next few days. Briefly explain why would you expect these results.-Add an inhibitor of acetate utilizing methanogens-Add an inhibitor of hydrogen […]

1. THFA is an important contributor to the synthesis of both purines and a specific pyrimidine. Which pyrimidine? Why does a block in the enzyme dihydrofolate reductase (DHFR) have negative consequences on nucleotide biosynthesis? What other negative consequences does this have: i.e. what other pathways might be influenced? Why?2. What […]