What is untrue of Yersinia pestis?
What will be an ideal response?
it produces Enterotoxin
* this is untrue
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Typically ________ of ORFs in a genome cannot clearly be assigned a function. These ORFs are usually assigned and predicted to encode hypothetical proteins
A) < 1 % B) 5 % C) 30 % D) 90 %
Which site on the ribosome is never occupied by a tRNA linked to a nascent polypeptide chain?
A. the A site B. the P site C. the E site
Steroid hormones can trigger gene expression in a select number of cells because
a. only target cells allow the steroid hormone to cross the plasma membrane. b. nontarget cells have a steroid hormone response element encoded in their DNA. c. only target cells have the correct receptor in their cytosol to bind to the hormone. d. nontarget cells lack the genes found in target cells. e. only target cells have the genes that steroid hormones activate.
The host DNA is usually degraded during which stage?
a. Biosynthesis b. Assembly c. Penetration d. Release e. Attachment