In bacteria, transcription termination is partly controlled by?
a. the -10 and -35 sequences in the promoter
b. hairpin loops in the RNA
c. the polyA tail
d. the translation start site
Ans: b. hairpin loops in the RNA
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What evidence would support the hypothesis that larger cells evolved in part by engulfing other, smaller cells?
What will be an ideal response?
Which group of plants lack true leaves and roots?
A. liverworts, hornworts, and mosses B. ferns, club mosses, horsetails, and whisk ferns C. ginkgo, cycads, conifers, and gnetophytes D. monocots and eudicots E. All plants lack true leaves and roots.
Specialized cell junctions include all of the following EXCEPT
A) tight junctions. B) phospholipases. C) gap junctions. D) desmosomes.
Stretches of a gene that code for protein products are known as what?
a. mRNA b. intron c. exon d. codon e. None of the above