I need to determine if the gene for a particular protein is the same length in frogs, humans, and trees
Which method or methods will be most helpful to me?
a. PCR and agarose gel electrophoresis
b. DNA cloning and DNA hybridization
c. cDNA library construction and agarose gel electrophoresis
d. genomic library construction
e. agarose gel electrophoresis alone
A
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A cell with a Barr body is_____
a. a bacterium b. a sex cell c. from a female mammal d. infected by Barr virus
Understanding the role of telomerase has helped scientists understand the number of times a cell can divided. If scientists could control the telomerase activity in specific cells, they could potentially stop
A. the formation of cancer. B. aging of cells. C. All of the answer choices are correct. D. meiosis. E. aerobic respiration.
Birds differ from earlier vertebrates by
a. their lack of scales. b. producing land eggs. c. the ability to maintain a relatively constant body temperature. d. the ability to fertilize eggs internally. e. their possession of a dorsal nerve cord.
The environmental contribution to bipolar disorder is most likely, at least in part, based on
_____________. A. prenatal exposure to toxic chemicals B. overexposure to UV light C. mutagens that damage DNA repair enzymes D. epigenetic changes involving methylation and demethylation E. childhood abuse