In the 1860s, a Swiss chemist, Friedrick Miescher, isolated an acidic substance from cell nuclei. What was the name of this substance, and what was its significance?
What will be an ideal response?
nuclein, contains DNA
Biology & Microbiology
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Organisms that are indifferent to the presence of oxygen and do not use it are
A. aerotolerant anaerobes. B. facultative anaerobes. C. obligate aerobes. D. microaerophiles.
Biology & Microbiology
Nanophytoplankton is
a. 2.0 to 20 microns. b. 20 - 200 microns. c. 2 - 20 mm. d. 20 - 200 cm. e. 20 - 200 mm.
Biology & Microbiology
A cell may meet the demand for large quantities of a specific protein by:
a. blocking transcription of the gene that encodes the protein. b. decreasing the half-life of the mRNA that specifies the protein. c. adding methyl groups to the gene that encodes the protein. d. gene amplification e. inhibition of DNA synthesis
Biology & Microbiology
Aseptic technique is no longer as important after a cell line is established.
a. true b. false
Biology & Microbiology