Select the correct answer from each drop-down menu.
The trp operon in E. coli regulates genes that code for enzymes required for synthesis of the amino acid tryptophan. The trp operon is a
repressible operon. When tryptophan is not available in the environment, the trp repressor protein is
. Therefore, RNA
polymerase can bind to the
to begin transcription.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!

answer///africa and asia;

answerparathyroid gland;