Which is an example of a recombinant DNA molecule?

A) a single-stranded RNA hybridized to a single-stranded DNA
B) a genomic fragment of human DNA ligated into a bacterial plasmid vector
C) a bacteriophage chromosome in a bacterial cell
D) a bacterial plasmid cut with a restriction enzyme and then resealed using ligase


B) a genomic fragment of human DNA ligated into a bacterial plasmid vector

Biology & Microbiology

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In subarctic saltmarshes, the addition of phosphorus has no effect on productivity but additional nitrogen will increase productivity. In this example, nitrogen is a

A. stimulant of evapotranspiration. B. precursor to phosphorus. C. biomagnifying factor. D. limiting factor. E. lipid solvent.

Biology & Microbiology

The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies

a. True b. False Indicate whether the statement is true or false

Biology & Microbiology

When cells stop responding to normal controls over

growth and division they a. begin to form a tumor. b. produce a malignancy. c. start to die. d. kill surrounding cells. e. produce scar tissue.

Biology & Microbiology

Which type of junction involves a connection to the actin cytoskeleton?

(a) adherens junctions (b) desmosomes (c) tight junctions (d) gap junctions

Biology & Microbiology