How do skin cells form different types of tissues? a. information in the dna of the nucleus can tell skin cells how to develop and perform special functions, which causes a group of these cells to perform similar functions and become skin. b. information in the rna of the nucleus can tell skin tissues how to develop and perform special functions, which causes a group of these cells to perform similar functions and become skin.

You are studying several alleles of an e. coli helicase gene. one allele, called rsr, confers resistance to rs2014, an antibiotic that works by inhibiting helicase activity. bacteria with the rss allele are sensitive to rs2014. another allele, called ts-, produces a temperature sensitive mutation of the helicase. in bacteria with the ts- allele, helicase is inactivated at 42 °c but functions normally at 37 °c. helicase functions normally at both temperatures in bacteria with the ts allele. you obtain the following data while testing four strains of e. coli at different temperatures and doses of rs2014. each number represents the percentage of maximal dna synthesis. based on this data, assign the appropriate genotype to strains a–d in the spaces provided