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The coreceptor depends on the tropism of the virus.  HIV R5 strains are [10a] tropic and bind to [10b] receptors primarily found on [10c] cells and HIV X4 strains are [10d] tropic and bind to [10e] receptors primarily found on [10f] cells.

The mRNA that encodes for this gene… (choose all that apply)

Answer questions 12-22 using the prompt below.   You are a research scientist studying a new strain of Ebola from a recent outbreak in Western Africa.  Since you discovered this new strain you name it Steds Ebola. You are concerned because it appears that Steds Ebola is more easily transmitted from chimpanzees to humans and between humans.  You launch an intensive research program to better understand the virus.

Answer questions 1-11 using the prompt below.   You are a doctor in Amsterdam that specializes in the treatment of Human Immunodeficiency Virus and volunteers at the Amsterdam Center for Sex Workers (ACS), a government funded clinic that works to improve health care for sex workers.

Ebola virus structure is due to [DP1] forming a [DP2] capsid.

In addition you know that an active, unphosphorylated ___ protein is required for transcription to occur.

Control of gene expression_________.

In order for transcription to be initiated

Suppose you have midterms in economics and astronomy tomorrow and you only have four hours left to study.  The accompanying table provides the combinations of time spent studying economics and astronomy and your expected exam score   Hours spent studying Economics Economics Exam Score Hours spent studying Astronomy Astronomy exam score 0 60 4 92 1 80 3 90 2 90 2 87 3 95 1 83 4 98 0 70 a) what is the opportunity  cost of studying 3 hours for your economics exam,  rather than 2?   b) if your goal is to maximize your average score for both exams,  which combination should you choose? c) If you decide to major in astronomy,  would that change the numbers of hours you would allocate to each course?  Explain in terms of marginal benefits and marginal costs.

The proteins necessary for the use of lactose in E. coli are collectively called the