Which chemical carries the DNA's instructions for synthesizing a particular protein from the nucleus to the cytoplasm?
A) RNA transcriptase B) messenger RNA C) transfer RNA D) ribosomal RNA
Answer: B
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Which of the following describe a role that ethylene plays in plant physiology. Check all that apply.
_____ Retarding stem and root elongation. _____ Hastening the ripening of fruit. _____ Inhibition of leaf abscission. _____ Inhibition of lateral bud growth. _____ Accelerates the loss of damaged fruits.
Which of the following would most likely diffuse across a synapse?
a. insulin b. NO c. histamine d. acetylcholine e. prostaglandins
When the catabolite activator protein binds to its binding site in DNA, it ________.
A. bends the DNA B. promotes the assembly of other transcription factors at the promoter C. displaces repressors D. eliminates the need for a sigma factor on the part of RNA polymerase
When doing SSU (small subunit ribosomal RNA) of a mixed population of microbes from an environmental sample, specific ________ are identified.
A. genotypes B. phylotypes C. phenotypes D. unknown microbes