For each of the following statements, indicate if it is true of the rough ER only, of the smooth ER only, of both rough and smoo
th ER, or of neither. a. has ribosomes attached to outer (cytosolic) surface
b. is site for biosynthesis of secretory proteins
c. site for folding of membrane-bound proteins
d. consists of flattened sacs
e. involved in detox of drugs
f. involved in breakdown of glycogen
g. tends to form tubular structures
h. contains less cholesterol than rest of membrane
i. visible only thru electron microscope
For H, I know that the smooth ER synthesizes cholesterol. Apparently, the endoplasmic reticulum as a whole has less cholesterol than other cellular membranes. So, I'm not 100% sure about H.
As Earth orbits the Sun, this same principle is used by astronomers to determine the distance to nearby stars. ... Parallax is the first "inch" on the yardstick with which astronomers measure distances even further to objects.
