The consensus coding sequence of homeotic genes is called a _______
A. TATA box
B. Pribnow box
C. homeobox
D. parasegment
C
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Secondary disinfection of drinking water is necessary to
A) maintain sufficient residual in the water distribution system to inhibit microbial growth. B) prevent the formation of biofilms on pipes in the water distribution system. C) neutralize taste- and odor-producing organic compounds. D) kill Cryptosporidium and other resistant pathogens.
The iron-response element (IRE) is a(n)
A) insulator element that binds IRE-binding protein in the absence of iron. B) transcriptional promoter that directly binds iron to prevent transcription of nearby genes. C) long noncoding RNA that binds iron and regulates transcription of multiple genes. D) sequence in the 5? untranslated region of mRNA that forms a hairpin loop, preventing translation of the mRNA by binding to IRE-binding protein in the absence of iron. E) example of a prokaryotic riboswitch that causes early termination of transcription in the presence of iron.
Which lineage includes living members that are jawless vertebrates called hagfishes?
a. Myxinoidea b. Urochordata c. Cephalochordata d. Petromyzontoidea
Which of the following statements does NOT describe a function of the cell walls of bacteria?
A. They avoid disintegration in water with low concentrations of salt. B. They protect against other bacteria. C. They protect against viruses. D. They maintain cell shape. E. They prevent horizontal gene transfer.