Which of the following is one role of rna polymerase during transcription?
to switch uracil with thymine on the exposed gene
to build a molecule of mrna
to break down an already existing protein
to produce a start sequence

for those looking, the answer would be to build a molecule of mRNA.

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d