Some proteins of the plasma membrane function serve as receptor proteins, sensing the external environment of the cell. About 3.3x b. About 100x 47. Some viruses have an RNA genome. Viruses are incapable of reproducing on their own.
Some viruses contain a phospholipid membrane envelope.
Some viruses infect bacteria. They harvest light energy. They convert carbon dioxide to sugar. They contain membranes called cristae. The grana of chloroplasts contain chlorophyll.