When a eukaryotic gene is cloned into a bacterium, the advantage of a complementary DNA (cDNA) gene being used instead of fragments of genomic DNA is that ________.
A. the introns have been removed from the cDNA gene but not from the genomic fragment
B. There is no advantage to using a cDNA gene rather than a genomic fragment
C. the cDNA is made with the nucleotides found in the prokaryote but not in the eukaryote
D. the promoter and terminator are found in the cDNA gene but not in the genomic fragment
Answer: A
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Which of the following is the correct order of the three lines of defense against pathogens?
a. barriers that exclude pathogens ? adaptive immunity ? innate immunity b. barriers that exclude pathogens ? innate immunity ? adaptive immunity c. innate immunity ? adaptive immunity ? barriers that exclude pathogens d. adaptive immunity ? barriers that exclude pathogens ? innate immunity e. adaptive immunity ? innate immunity ? barriers that exclude pathogens
Chemical signaling molecules that diffuse across a chemical synapse are called
a. neurotransmitters. b. enzymes. c. neurostimulators. d. neuron releasing factors. e. ion carriers.
Cardiac muscle cells are connected by special junctions called intercalated discs. Intercalated discs provide strength between cells of tissues which exhibit high mechanical stress, strong flexible connections between tissue cells, and electrical excitability between the cells. Using this information, which junctions are present in intercalated discs?
A. Tight, plasmodesmata, and desmosomes B. Adherens, tight, and gap C. Gap, desmosomes, and hemidesmosomes D. Gap, adherens, and desmosomes E. Tight, plasmodesmata, and adherens
Autoantigens are types of self-antigens that initiate an autoimmune response that can cause damage to host tissue.
Answer the following statement true (T) or false (F)