Eukaryotic ribosomes recognize and initially bind to what structure on the mRNA?
a. A Shine-Dalgarno sequence
b. The 7-methylguanosine cap
c. A TATA sequence
d. A CCAAT sequence
Ans: b. The 7-methylguanosine cap
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The plots that were staked out on the island were part of the:
A. applied research. B. basic research. C. experimental design. D. constructed model.
The nictitating membrane of sharks is used to:
a. protect the gills. b. line the mouth. c. enclose the internal organs. d. detect smells. e. cover the eye.
In phloem movement, which of the following cannot serve as a sink?
a. young leaves b. young roots c. developing fruits d. tulip bulbs after the plant has bloomed e. soil
In vertebrates, DNA methylation - the addition of a methyl group to DNA nucleotides - ensures that
A. the gene functions without interruption. B. once that gene is transcribed, the mRNA is saved and used over and over again. C. no errors will be made during transcription. D. once a gene is turned off, it will remain off. E. the nucleosome will quickly form, which assists in mRNA formation.