What do many of the different kinds of allergies have in common?

A) They contribute to autoimmune disorders. B) All allergens are living things.
C) They cause histamine release. D) They result in high blood pressure.


Answer: C

Biology & Microbiology

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Plasma cells

A. produce antibodies. B. kill infected cells. C. mature in the thymus. D. remain present in the body at low levels after an infection. E. secrete cytokines.

Biology & Microbiology

Achondroplasia, a hereditary form of dwarfism, is an autosomal dominant disorder; however homozygous dominant

individuals either die before birth or very shortly thereafter. The homozygous recessive condition is normal. A dwarf couple decide to have children. Use this information to answer the following question:Of the children of this couple who survive, what is the probability that they will be normal?

a. 0 b. ¼ c. 1/3 d. 2/3 e. ½

Biology & Microbiology

__________ acts on the uterus and milk ducts. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

A particular haploid strain of yeast contains a temperature-sensitive mutation in its cdc2 gene resulting in no functional Cdc2 protein at the nonpermissive temperature

At the nonpermissive temperature, each of the following events would fail to occur at the appropriate cell cycle stage except A) replication of DNA. B) fragmentation of the nuclear envelope. C) condensation of chromosomes. D) appearance of the mitotic spindle. E) prevention of fusion of chromosome ends.

Biology & Microbiology