Like all gram-negative bacteria, it has a double membrane with a cell wall.

Pores of these protozoans are restricted to certain areas in the central capsule, which may be a single or double membrane in different groups.

Each chloroplast is surrounded by a double walled semi-permeable membrane.

The nucleus is spherical and separated from the cytoplasm by a double membrane called the nuclear envelope.

Together these form a double membrane, which functions to remove carbon dioxide and to replenish oxygen through the porous shell.

Like mitochondria, they have a double membrane and most proteins are delivered to them by a targeting sequence of amino acids.

Pericardium is a tough double layered membrane which covers the heart.

The nucleus is surrounded by a double membrane (commonly referred to as a nuclear envelope), with pores that allow material to move in and out.

This involves the formation of a double membrane around the organelle known as an autophagosome.

And since the roof is built as a double membrane, the air trapped between the fiberglass layers insulates the house.