Protein Synthesis Answers

Only the proteins that the bacteria Escherichia coli (E. coli) needs are synthesized at any given time. For example, when lactose is available in the environment, E. coli will express the lac genes that allow it to break down lactose to obtain energy. When lactose is not present, these genes are not expressed.Which prevents the lac genes in the DNA of E. coli from being expressed most of the time?

The study of Escherichia coli (E. coli) led researchers to new experimental designs for studying operons. Which experimental design did the scientists use?

Which describes a promoter?

Which summary below correctly describes what occurs during transcription?

Which molecule brings amino acids to the ribosomes to be assembled into proteins?

Which nucleic acid provides the master code for protein synthesis?

Which occurs during transcription?