Reproductive isolation is a major way two new species can arise from two populations of organisms that started out as one species. Using complete sentences, give and explain FOUR ways that two populations could become reproductively isolated. Give two prezygotic barriers and two postzygotic barriers.

Treatment of cells with the BOBA drug induces apoptosis of cells and leads to DNA fragmentation.

A) (4pts) Describe the cellular mechanism that causes DNA fragmentation during apoptosis to occur. (4 sentence max)

B) (8pts) Describe an experiment, step by step, that can be used to determine how many hours after BOBA treatment DNA fragmentation occurs. (8 sentence max)

C) (4pts) One of your friends said they would use an Annexin V and PI staining technique to identify how many hours post BOBA treatment DNA fragmentation occurs. Why won’t this experimental method work to answer this experimental question? (4 sentence max)

Hepatitis C is a chronic liver infection that can be either silent (with no noticeable symptoms) or debilitating. Either way, 80% of infected persons experience continuing liver destruction. Chronic hepatitis C infection is the leading cause of liver transplants in the United States. The virus that causes it is blood borne, and therefore patients who undergo frequent procedures involving transfer of blood are particularly susceptible to infection. Kidney dialysis patients belong to this group. In 2008, a for-profit hemodialysis facility in New York was shut down after nine of its patients were confirmed as having become infected with hepatitis C while undergoing hemodialysis treatments there between 2001 and 2008.

When the investigation was conducted in 2008, investigators found that 20 of the facility’s 162 patients had been documented with hepatitis C infection at the time they began their association with the clinic. All the current patients were then offered hepatitis C testing, to determine how many had acquired hepatitis C during the time they were receiving treatment at the clinic. They were considered positive if enzyme-linked immunosorbent assay (ELISA) tests showed the presence of antibodies to the hepatitis C virus.

Health officials did not test the workers at the hemodialysis facility for hepatitis C because they did not view them as likely sources of the nine new infections. Why not?

Why do you think patients were tested for antibody to the virus instead of for the presence of the virus itself

What kind of reaction occurs when anti-tTG is bind to the tissue transglutaminase? What kind of biosensor can measure their reaction? How will the measurement be made for their reaction?

When allograft grafts are in the recipient, and the tumor cell is in the body,

explain the similarities and differences between the implant and the tumor cell. (Immunologically)

How can i answer this??

Consider the structures that are referred to as ‘ketone bodies’. A. What metabolic states can lead to their formation? B. What organ absolutely requires these structures as an energy source? And why? C. Outline their syntheses starting from acetylCoA. D. The formation of excess levels of ketone bodies (ketosis) is a bad thing for the organism? Why exactly? E. When a person is experiencing ketosis, it is sometimes mistaken for excess alcohol consumption. Why? There are 2 distinct reasons why this mistake may be made. What are they?

A gene is 8,001 nucleotides in length. Studies of this gene show that it encodes a protein only 400 amino acids long – far shorter than the 2,667 amino acids that were expected. This is best explained by the fact:

nucleotides often break off and are lost during the transcription process.

the genetic code is ambiguous (unclear).

in some cases, many nucleotides are used to encode a single amino acid.

many of the 8,001 nucleotides of the gene are ultimately noncoding.

Assuming that a diploid genomic locus has 3-alleles, A, C and G, in a population of N individuals, in generation “t”, such that the frequency of each of these alleles are p, q, and r respectively, derive the two tenets of Hardy Weinberg Equilibrium after one generation of random mating.

AcetylCoA is considered a high energy molecule because hydrolysis of the thioester bond is very exergonic (∆G is - ). In contrast, the analogous oxyester would not be nearly as exergonic. Why is that? Provide one free energy diagram to show hydrolysis of both a thioester and an oxyester. Also provide an explanation for the difference in stability between thioesters and oxyesters. Your explanation should include relevant electron configurations and orbital overlap considerations

6. You are wandering in the wilderness, naked, hungry, and cold. You find two caves of the same dimensions. In one cave there is 600 kg moose and in the other cave are 100,000 6-gram mice. Both species are very friendly and they have an unlimited supply of food.

a. Which cave would you enter to warm up quickly? (you cannot eat the animals!!). Why?

b. If you were to isolate mitochondria from the liver of the moose and livers of the mice, how would the State 4 respiration rates differ? How does this relate to your answer in question 6a? It is to your advantage to give as detailed an answer as possible because it will help you integrate the material from the subcellular to the whole-animal level.

Explain some problems and solutions to conserve for the Connecticut River Watershed in two paragraphs

Write an essay on the following topic “Should companies posess the right to patent genes in crops.” In this discussion please highlight clearly the advantages and disadvantages.

Must include references or citations

(unicellular vs metazoan), use no more than a few short sentences to speculate why one organism might encode the protein and another may not. Your reasoning should include reference to the type of protein and how it works in general terms.

read "why infectious disease research needs community ecology" and write a paragraph of at least 130 words each.

1c. Name some immune-related proteins you expect to be on the surface of RAW macrophages and the functions of them.

1d. Regardless of the species of origin, most cell lines are derived from some kind of cancer. Why is this?