Culture flasks with growth medium consisting of salts

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Reference no: EM133199192

1. You are trying to culture a virus. You set up a series of culture flasks with a growth medium consisting of salts, amino acids, and carbohydrates that is designed to support the virus, transferred the virus to the flasks using aseptic (sterile) technique, and incubated them at the correct temperature. When you check the flasks after 24 hours, you detect no growth of the virus. What did you do wrong?

2. Allergies such as hay fever are caused by allergens interacting with ______________

a. natural killer cells

b. mast cells

c. neutrophils

d. cytotoxic T cells

3. Pathogenic strains such as EHEC (Enterohemorragic Escherichia coli) cause disease by expressing genes they acquired from another type of bacteria by means of a phage. The phage in this case would be classified as

a. Retroviral

b. enveloped

c. lytic

d. lysogenic

4. The first type of antibodies produced in the humoral immune response is

a. the IgG class

b. the IgE class

c. the IgM class

d. the IgF class

Reference no: EM133199192

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