Which of the following prokaryotic transport systems does not require the use of cellular energy to bring compounds into the cells?
a. group translocation
b. endocytosis
c. abc transport
d. sidetrophores
e. facilitated diffusion

e. facilitated diffusion

Explanation:

Facilitated diffusion is one of the types of passive transport where the molecule moves from higher concentration to the lower concentration. Since the movement is along the concentration gradient, it does not require cellular energy.

It is called facilitated because some special proteins aid in the process. Many big and polar molecules can not cross the membrane easily despite the concentration gradient being present so they need the help of special proteins for movement. For example, water molecules are sometimes transported across the membrane using aquaporins.

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