All EXCEPT which of the following have
cartilaginous skeletons?
a. sharks
b. lampreys
c. perch
d. Manta rays
e. stingrays
Answer: c
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Bacteria use ______ attached TO the polymerase to direct RNA polymerase to promoters; eukaryotic cells use ______ that attach directly to the DNA first instead
A. sigma factors; transcription factors B. transcription factors; sigma factors C. ribosomes; sigma factors D. tRNA; rRNA
In using Agrobacterium tumefaciens to transfer genes into plants, what is transferred from bacterium to plant?
A) Ti plasmid B) T-DNA C) opines D) only the recombining sequence E) the entire bacterium
How is hemolytic disease of the newborn prevented?
A) immunizing a woman against Rh factor prior to pregnancy B) administering anti-IgG antibodies during pregnancy C) treating with cytokines to prevent B cell activation late in pregnancy D) administering anti-Rh IgG late in pregnancy and after pregnancy ends E) treating with glucocorticoids throughout pregnancy
A fastidious organism might be grown on which of the following types of media?
A. transport media B. reducing media C. enriched media D. differential media E. selective media