A set of three-nucleotide-long "word" that specify the amino acids for polypeptide chains
What will be an ideal response?
Triplet Code
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In Griffith's experiments,
A. mice infected with live nonvirulent bacteria developed pneumonia and died. B. nonvirulent bacteria transformed the virulent bacteria into a nonvirulent variety. C. mice infected with heat-killed virulent bacteria and live nonvirulent bacteria developed pneumonia and died. D. mice infected with heat-killed virulent bacteria and heat-killed nonvirulent bacteria developed pneumonia and died.
Transcomplementation is a name sometimes given for a test to see whether a gene from one organism can "rescue" a loss-of-function mutant of a different organism with a homologous gene. To which of the following processes might this term apply?
A) replacement of a nonfunctional globin gene with a globin pseudogene B) substitution of a drought-resistant gene from potato plants with a drought-resistant gene from a cactus species C) introduction of a human WEE1 gene into a yeast culture with wee1- mutants D) replacement of a cdc25– with a cdc13+ gene to rescue a cell cycle dysfunction E) use of Drosophila heat shock gene promoters to regulate heat shock genes in fugu
A bacterial gene regulatory system is likely to have (check all that apply)
A. a motor. B. a coding sequence. C. an operator. D. a ribosome recognition site. E. one or more introns.
If, in a heterozygous individual, only one allele is expressed in the phenotype, that allele is
A) normal. B) haploid. C) recessive. D) potent. E) dominant.