The Nucleus of a Cell ________

Question

The nucleus of a cell ________.
A) is completely enclosed with no way in or out
B) contains only the DNA
C) is surrounded by a double layered membrane
D) it contains large proteins that form the chromosomes and are the genetic material for the cell
E) has all of these attributes

Accepted Answer

The nucleus of a cell is surrounded by a double layered membrane, called the nuclear envelope, which separates it from the cytoplasm. This membrane has pores that allow certain molecules to pass in and out of the nucleus. The nucleus contains the genetic material of the cell, which includes the DNA organized into chromosomes, as well as proteins and RNA. Therefore, options A, B, and D are incorrect.