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
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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.
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
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.
Which type of junction involves a connection to the actin cytoskeleton?
(a) adherens junctions (b) desmosomes (c) tight junctions (d) gap junctions