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Describing the Hershey-Chase Experiment

Describe the Hershey-Chase experiment. Explain in your own words, as if you were talking to someone with no genetics background, how they used radioactive isotopes to demonstrate that DNA, not protein, is the genetic material. Be sure to include details of the experiment in your explanation.

parasites: organisms that can cause parasitic diseases in the human being

Discuss at least four types of organisms that can cause parasitic diseases in the human being. Explain three laboratory techniques that can be used to identify an intestinal parasitic infection. What are the different routes that pathogenic protozoans can use to enter the host cells? Why were some contact lens sol

data and analyze factors

Using the Internet to gather statistical data and related background information on your chosen disease. Compile information on the following: Populations affected by the disease Historical outbreaks of the disease Typical progression of the disease discussing your findings and analyze factors

Hershey-Chase Experiment Proving DNA as the Genetic Material

Hershey and Chase intended to see if it's the viral DNA or the viral protein coat that enters bacteria upon infection with bacteriophage (virus infecting bacteria). By determining this they could tell which component of virus actually carries the genetic information and results in formation of more viruses with in the bacterium

Determination of the Titer of B-D-Galactosidase Using the ELISA

The purpose of the experiment that took place was to determine the titer of B-D-galactosidase using the enzyme-linked immunosorbent assay. given the results of the experiment, how do you determine the titer, and what do these results mean? The raw data (results obtained from the plate reader) are attached in the excel file. I fo

How retroviruses cause cancer

A number of tumors from inbred animals such as mice and chickens show associated retroviruses. How do you think they affect gene expression in these animals such that it results in cancer? Propose experiments to test your hypothesis.

Features of a perfect pathogen

If you were to create a hypothetical perfect pathogen, identify four features of the pathogen that help to maximize its survival and spread within a host population. For each feature described, provide a named example of a real pathogen that uses a similar feature.

HIV Pandemic

Human Immunodeficiency Virus (HIV) is described as being a pandemic already, but does this disease have the potential to explode into one of the greatest health care threats during this century

Foodborne Viral Infections

What species is the most common source of virus in foodborne disease and what measures might be taken to reduce the risk of viral transmission from this source?

Viral Foodborne Disease

1.) Which group of viruses is the most common cause of viral foodborne disease? Note: Most be a least 3 paragraphs and please site references used.

Shigella And Yersinia

1.) Discuss in some detail the set of effectors developed by Yersinia sp. To ensure their survival in the human host. Note: Please cite references


1.) What virulence factors are important in establishing a Salmonella infection? Note: Please make responses at least 3 paragraphs and cite references.

Bacteriophages and Lysogeny

I) Why might have virology developed more slowly without the use of Chamberland's porcelain filter? ii) How are viruses classified? Give a complete account of the characteristics used in this process? iii) Describe the lytic and lysogenic life cycles of a bacteriphages. Include in your answer comparisons a

Lymphatic System

Identify the organs of the immune system and their respective functions.

Parvovirus B19-Associated Conditions

2. Three siblings are exposed to Parvovirus B19, a virus that commonly infects children, infecting and destroying erythrocytes (RBCs) and in rare cases causes a transient anemia but usually is cleared with no long term affects. They responded as follows: -Brother #1, age 14, develops a high fever and general malaise 8 days a

switching from Th1 to Th2 responses

This solutions describes circumstances where it may be desirable to convert a patients' CD4 T cell response from a Th1-dominated to a Th2-dominated response or vice versa. The solution describes, using examples, diseases associated with these responses, and why each type of immune response may be damaging to the host.

Immune response in the outcome of schistosomiasis

The type of T cell-mediated immune response has a key impact on the outcome of several parasite infections. This solution uses schistosomiasis as an example to explain how different types of T cell response can have different effects on the control of the parasite.

Designing antiviral drugs

Antiviral drugs must be designed in a different way to that used for antibiotics or other anti-infective agents. This solution details the considerations that must be taken into account when developing antiviral drugs, and gives examples of different classes of antivirals.

Th1 and Th2 immune responses in immunity to infections

The CD4 T cell response can develop into either Th1 or Th2 responses, characterized by production of different cytokines. These two different responses have evolved to deal with different types of infections. The solution details which infections are most effectively controlled by each type of response, and details the underly

Questions about vaccines

I can not figure this problem out. Subunit vaccines can be made by genetic engineering of yeast cells. A side effect of this kind of vaccination might be_______. the disease a yeast infection duet to extraneous material that the vaccine doesn't provide immunity none of the above Which enzyme does not make sticky en