Question

question 30
lipids are synthesized by ___.
a rough er
b smooth er
c lysosomes
d ribosomes
e nucleus
question 31
what organelle produces proteins in prokaryotic cells?
a rough er
b cell membrane
c cell wall
d ribosomes
e smooth er

Explanation:

For Question 30, the smooth endoplasmic reticulum (smooth ER) is responsible for lipid synthesis. Rough ER is mainly for protein synthesis, lysosomes are for digestion, ribosomes make proteins, and the nucleus contains genetic material.
For Question 31, in prokaryotic cells, ribosomes are the organelles that produce proteins. Prokaryotes lack a rough ER and smooth ER as they are membrane - bound organelles not present in prokaryotes. The cell membrane and cell wall do not produce proteins.

Answer:

Question 30: B. smooth ER
Question 31: D. ribosomes