Solved by a verified expert:1) Rough endoplasmic reticulum and smooth endoplasmic reticulum differ:a) only by presence or absence of ribosomes.b) both in the presence or absence of ribosomes and in their function.c) only in microscopic appearance.d) in their distribution within a cell.e) none of the above.2) Which of the following cellular structures are lipid bilayer-bound compartment?a) a mitochondrion.b) the smooth endoplasmic reticulum.c) the golgi apparatus.d) the nucleus.e) all of the above are membrane-bound compartments.3) Substances move through biological membranes down concentration gradients via:a) simple diffusion.b) secondary transport.c) facilitated transport.d) both a and b.e) both a and c.