An autoimmune disease characterized by pain and progressive destruction of the joints, weight loss, morning stiffness, and presence of an antibody directed against IgG best describes:
A.) hemolytic anemia.
B.) lupus.
C.) hemolytic disease of the newborn.
D.) rheumatoid arthritis.
Ans: D.) rheumatoid arthritis.
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The incorporation of a single strand of donor DNA into a recipient DNA duplex so that the donor strand replaces one of the strands or the recipient duplex generates ________ DNA.
A. unstable B. heteroduplex C. aberrant D. heterogeneous
Which of the following statements is true regarding T cell receptors? Select all correct
A. They recognize antigen-MHC complexes. B. They contain variable and constant regions. C. They are composed of two heavy (H) chains and two light (L) chains. D. They are formed by the rearrangement of V, J, C, and D gene segments. E. They can be found in the bloodstream independent of T cells.
Which of the following statements is false about the
nest-decorating behavior of starlings? a. It deters bloodsucking mites. b. It increases the survival of nestlings. c. It promotes reproductive success of the parent birds. d. It is a learned behavior. e. None of these..
Joining small molecules (monomers) together to form longer chains (polymers) requires a process called
A. a hydrolysis reaction. B. a dehydration reaction. C. disassembly. D. emulsification. E. monomerization.