Which of the following require physical contact between two bacterial cells for DNA transfer?
Answer: Conjugation
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Cloning a gene involves all of the following except
A. introducing ligated DNA into E. coli cells. B. insertion of the gene into an appropriate vector. C. expression of the vector and the gene in a cell-free environment. D. isolating the fragment of DNA containing the desired gene.
Each strand of the DNA molecule serves what function during DNA replication?
a. source of amino acids b. source of bases c. enzymatic function d. DNA unwinding e. DNA template
Biomass is the total amount of ________ an ecosystem
A) organic matter tied up in the consumers of B) organic matter tied up in the producers of C) chemical elements recycled by the detritivores of D) living organic material in
One of the most powerful new techniques for analyzing gene expression en masse is that of microarrays
How can this method be used to ascertain all the changes in gene expression that occur in normal breast tissue and tissue taken from a breast cancer tumor? What will be an ideal response?