Which of the following is a feature of the nuclear envelope?
ASingle membrane studded with ribosomes only
BTriple membrane like Gram-negative bacteria
CSingle membrane with no pores
DDouble membrane with nuclear pores
Answer & Solution
Correct answer: D. Double membrane with nuclear pores
The nuclear envelope is a double membrane (the outer membrane is continuous with the rough ER). Nuclear pores formed by nucleoporins regulate exchange of macromolecules between nucleus and cytoplasm.
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