Probes used for detecting genetic sequences are frequently composed of
A) agarose.
B) synthetic nucleic acids and labeled conjugates, such as fluorescent dyes.
C) restriction enzymes.
D) silicon chips.
E) nitrocellulose.
B
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The practice of cells turning on the production of some enzymes and turning off others in response to a changing environment is called
A. compromise. B. metabolism. C. nutritional metabolism. D. adaptation.
Males who tend to be taller than average may have a chromosomal composition of
a. XXY. b. XYY. c. Turner syndrome. d. Down syndrome. e. XXX.
Black and brown guinea pigs are bred together. Assuming their color is determined by one gene, and that there is a dominant and a recessive allele, how would you determine which allele is dominant? How could you determine the genotypes of the parents? Explain.
What will be an ideal response?
Which of the following accurately describes transcriptional control of gene expression in eukaryotes?
a. Activators trigger sequences of DNA transcription factors to be expressed b. Dependent on interactions of mRNA sequences with ribosomes c. Promoters help transcription factors bind to RNA polymerases d. Transcription factors help RNA polymerase bind to promoter sequences