A. none of the answers are correct
28. Which of the following statements are accurate?
A. none of the answers are correct
B. An effective humoral immune response typically requires both T cell and B cell activation.
C. T cells activation does not usually require antigen presentation by an antigen presenting cell.
D. Viruses can avoid activating the adaptive immune system if they do not change their surface antigens once they have been recognized by T and B cells.
E. People who were affected with the smallpox virus before cowpox virus were naturally immune to the smallpox virus because the viruses shared some common antigens and the memory cells that recognized cowpox antigens responded to smallpox antigens as well.
F. Helper T cells can kill cells that are infected with viruses and Cytotoxic T cells are known to activate B cells.
Answers: 1
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During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid
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Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.
Answers: 2
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Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis
Answers: 1
28. Which of the following statements are accurate?
A. none of the answers are correct
A. none of the answers are correct
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