IgE antibody, which is associated with allergic responses,
A) encourages mast cells and basophils to release chemicals such as histamine and leukotrienes.
B) can be found bound to B cells.
C) is resistant to destruction by stomach acid.
D) is usually found circulating in the bloodstream.
E) is passed from mother to child through breastfeeding and may prevent the development of allergies in the child.
Answer: A
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The type of RNA that physically interacts with a ribosome, providing the sequence information for a specific protein, is abbreviated:
A. rRNA. B. siRNA. C. mRNA. D. snRNA. E. tRNA.
The natural habitat of Mycoplasma spp., which causes infectious disease in humans, can best be described as the:
a. mucous membranes of humans. b. aquatic environment. c. natural environment. d. genitourinary tract of animals.
Which of the following choices best describes the genetic engineering used to prevent rejection of xenotransplants?
1.Transgenic pigs carrying human genes donate organs to patients who also receive bone marrow transplants from the donor pig. 2.Hyperacute rejection of MHC proteins from animal donors is prevented by the use of cloned animal tissues lacking MHC markers. 3.Transgenic pigs carrying human genes donate organs to patients who also receive bone marrow transplants from the donor pig, resulting in chimeric immune systems. 4.A bone marrow transplant from the human patient to the donor pig affects MHC proteins on the pig organs, reducing the severity of xenotransplant rejection.
In rabies, spasms of muscles for swallowing lead to a fear of water.
Answer the following statement true (T) or false (F)