Monoclonal antibodies:a
have been linked as causative agents in some types of cancer.
b. are only produced by harvesting B cells from mice exposed to particular antigens.
c. include hCG, a component of commonly used home pregnancy tests.
d. are very specific for their target antigen, but are somewhat difficult to purify.
e. are produced by millions of genes.
C
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Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. lysing virus-infected cells and preventing further propagation of the pathogen. B. stimulating components of the immune system through the release of cytokines. C. blocking or reducing the inflammation response in mucous membranes. D. stimulating the production of specific antibodies. E. recruiting macrophages to the nasal epithelium.
Individuals with the genotype Gg Hh Ii Jj will produce how many different kinds of gametes?
a. 2 b. 4 c. 6 d. 8 e. 16
What group was likely ancestral to land plants?
A. multicellular green algae found in marine habitats B. multicellular brown algae found in terrestrial habitats C. multicellular green algae found in freshwater habitats D. multicellular brown algae found in marine habitats
Movement of molecules down their concentration gradient can drive the movement of a different molecule against its concentration gradient.
Answer the following statement true (T) or false (F)