The nuclear envelope is composed of ______.a double membranecarbohydratesDNAchromatin

The nuclear envelope is composed of a double membrane.

Explanation

The nuclear envelope, also known as the nuclear membrane, surrounds the nucleus of eukaryotic cells and consists of two lipid bilayer membrane layers: an outer membrane and an inner membrane. These membranes serve to protect the genetic material within the nucleus and regulate the movement of molecules in and out of the nucleus via nuclear pores. The outer membrane is continuous with the endoplasmic reticulum, which plays a role in protein and lipid synthesis. This double-membrane structure is essential for maintaining the integrity of the nucleus and facilitating the complex processes of gene expression and replication, contributing to the overall function of the cell. Other options, such as carbohydrates, DNA, and chromatin, play roles within the cell but are not structural components of the nuclear envelope.