Assume that a given plasmid vector to be used in a cloning experiment contains 4000 base pairs of DNA
Assume also that the restriction endonuclease Cuj cuts this plasmid at the following sites (starting from an arbitrary zero point): 1000, 1500, and 3000. Given complete digestion of the plasmid with the endonuclease so that only linear fragments are produced, what sizes of DNA are expected?
500 bp, 1500 bp, and 2000 bp
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Place the five steps of digestion in most animals with a digestive tube in the proper order
a. absorption ?enzymatic hydrolysis ?mechanical processing ?secretion of enzymes ?elimination b. absorption ?mechanical processing ?enzymatic hydrolysis ?secretion of enzymes ?elimination c. mechanical processing ?absorption ?secretion of enzymes ?enzymatic hydrolysis ?elimination d. mechanical processing ?secretion of enzymes ?enzymatic hydrolysis ?absorption ?elimination
e. mechanical processing ?secretion of enzymes ?absorption ?enzymatic hydrolysis ?eliminationIn the life cycle of bryophytes and seedless vascular plants, meiosis takes place in the
a. gametophyte. b. sporangium. c. archegonium. d. zygote. e. antheridium.
Humans can be accidental intermediate hosts for some tapeworms
Indicate whether the statement is true or false
What do tapeworms eat?
A) intestinal bacteria B) host tissues C) red blood cells D) intestinal contents E) plant matter