Which of the following must occur for a malignant tumor to form?
1.proto-oncogene converted to oncogene
2.failure of tumor suppressor gene
3.both proto-oncogene converted to oncogene and failure of tumor suppressor gene
4.none of the choices
3
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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
Activators are cis-acting sequences that increase transcription from a promoter
Indicate whether the statement is true or false
Gigantism is caused by hypersecretion of ________ hormone during childhood and adolescence
Fill in the blank(s) with correct word
Endospores can be killed by
A. glutaldehyde for 8 or more hours. B. ethylene oxide for 3 or more hours. C. incineration. D. dry heat at 170°C for 2 hours. E. All of these choices are correct.