Cells only synthesize dna from the 5′ to the 3′ end, and since double-stranded dna is complementary, both strands cannot be replicated in the same way. how do cells handle this situation?

The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Polar zones are cold and tend to be dry because of a pressure system of cold. low high