Phages are viruses that can infect
A. farm animals.
B. humans.
C. bacteria.
D. plants.
E. insects.
Answer: C
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Bioluminescence is controlled by the gene regulatory mechanism called quorum sensing, wherein the
A) depletion of oxygen is detected by an inducer molecule which activates transcription of the lux operon. B) accumulation of an inducer molecule activates transcription of the lux operon. C) absence of light activates an inducer molecule which activates transcription of the lux operon. D) host tissues produce an autoinducer molecule which activates transcription of the lux operon.
A woman goes to the doctor and is diagnosed as having rheumatoid arthritis. What factors led to her development of this disease? Select all correct choices
A. Some of her T cells were not positively selected. B. Some of her T cells were not negatively selected. C. Some of her T cells are recognizing and responding to her normal self antigens. D. Some of her T cells are not recognizing and associating with her MHC proteins.
After the action of the helicase, single-stranded binding proteins keep the parental DNA strands from reforming a double-helix
Indicate whether the statement is true or false
Place these genes in their temporal order of expression from earliest to latest during Drosophila development.
A. Bicoid, Gap, Homeotic B. Homeotic, Gap, Bicoid C. Homeotic, Bicoid , Gap D. These genes are not expressed at different times during development. They are expressed at the same time, but in a different spatial order. E. Kruppel, gooseberry, even-skipped