The nucleus is surrounded by the
A)nucleolus.
B)nucleoplasm.
C)nuclear envelope.
D)nuclear matrix.
E)nucleosomes.

Question

Quizplus · Accepted Answer

The nuclear envelope is the double membrane structure that surrounds the nucleus and separates it from the cytoplasm.

Answer: B
 The nucleoplasm is the fluid-filled region inside the nuclear envelope where the chromatin (DNA and associated proteins) is found.

Answer: A, D, E 
 The nucleolus is a dense structure inside the nucleus where rRNA is synthesized and ribosomes are assembled. The nuclear matrix is the network of protein fibers that supports the shape of the nucleus. Nucleosomes are the basic unit of chromatin structure, consisting of DNA wrapped around histone proteins. However, none of these structures directly surround the nucleus.

The Nucleus Is Surrounded by the