The ability to mount an efficient secondary antibody response depends on
A. All of the choices are correct
B. Memory T and B cells
C. Cross-linking of IgM antibodies
D. High concentrations of IgA antibody
E. Class switching to IgD production
Answer: B. Memory T and B cells
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The term 'recombinant organism' refers to
A. genetically engineered cells, but not those that have new genes as a result of horizontal gene transfer. B. an organism that has genes passed down from the parent cell to the daughter cells during binary fission. C. an organism that has recombined its genes. D. an organism that expresses proteins coded for by genes that originated in a different organism.
Which of the following conclusions is best supported by the data?
(A) Bicoid protein inhibits translation of caudal mRNA. (B) Bicoid protein stabilizes caudal mRNA. (C) Translation of bicoid mRNA produces caudal protein. (D) Caudal protein stimulates development of anterior structures.
The "one gene-one enzyme" hypothesis states that
A) the synthesis of each gene is catalyzed by one specific enzyme. B) the synthesis of each enzyme is catalyzed by one specific gene. C) the function of an individual gene is to dictate the production of a specific polypeptide. D) the function of each polypeptide is to regulate the synthesis of each corresponding gene.
The process of introducing a needed normal gene into human cells is called DNA mapping.
Answer the following statement true (T) or false (F)