A baby born without a thymus:a
would not have an antibody mediated immune response.
b. would not produce lymphocytes.
c. would not produce immunocompetent T cells.
d. will lack the ability to mount an immune response.
e. will lack antigen presenting cells.
c
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Several new materials have been developed for use in the microbiology lab. These materials must be sterilized before use, but cannot withstand a temperature over 60oC and can't be exposed to water. Which method of sterilization would be applicable?
A. Oven-dry heat B. UV radiation C. Steam autoclave D. Ionizing radiation
________ is the organelle associated with the functions of steroid biosynthesis, carbohydrate metabolism, and drug detoxification.
Fill in the blank(s) with the appropriate word(s).
Which of the following is the gene from which bacteria has been introduced into many plant genomes to confer the ability to produce toxic crystals that kill many insects?
a. Agrobacterium tumefaciens b. E. coli c. Y. pestis d. Bacillus thuringiensis
Suppose that Joe Scientist fuses a mouse cell and a human cell, and then treats the cell with specific antibodies covalently linked to fluorescent dyes (antibodies linked to mouse proteins are green; antibodies linked to human proteins are red). Forty minutes later, Joe Scientist looks at the fused cell. What will Joe Scientist observe?
a. The red and green labels will be distributed in intermingled patches. b. The red and green fluorescent labels will be uniformly distributed across the entire membrane. c. The red and green labels will flash intermittently. d. The cell will be half red and half green.