Final answer:
Lipid membranes are B) found in both cells and viruses.
Step-by-step explanation:
Lipid membranes are found in both cells and viruses. In cells, the lipid membrane is known as the plasma membrane or cell membrane. It forms the physical boundary of the cell and separates the inside of the cell from the outside environment. The lipid membrane in cells is composed of a phospholipid bilayer that is selectively permeable, allowing certain molecules to enter or leave the cell.
In viruses, the lipid membrane is called a viral envelope. Some viruses can surround themselves with a portion of the host cell's membrane, such as the outer membrane or internal membranes like the nuclear membrane or endoplasmic reticulum. The viral envelope is studded with proteins coded for by both the viral genome and the host genome, but the lipid membrane and any carbohydrates present come entirely from the host cell.
Examples of enveloped viruses include the influenza virus, HIV, and the varicella zoster virus. Therefore the correct answer is B) found in both cells and viruses.