Which organelle's structure allows for only certain things to come in and out of the cell?
O a. Organelles
O b. DNA
O c. Membrane
O d. Chromatin

Which codon is the code for the amino acid histidine (his)?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d