Question

question 7
the smooth endoplasmic reticulum:
a has ribosomes attached
b all of these
c none of these
d lacks ribosomes

Explanation:

The smooth endoplasmic reticulum (SER) is characterized by the absence of ribosomes on its surface. Ribosomes are attached to the rough endoplasmic reticulum (RER), not the SER. Since option A is incorrect (as SER does not have ribosomes attached) and option B (all of these) is wrong because A is incorrect, and option D (lacks ribosomes) is correct. So option C (none of these) is wrong as D is correct.

Answer:

D. lacks ribosomes