Cell Biology

• Combined Science Biology Specification: Cell Biology
• Plant and animal cells (eukaryotic cells) have a cell membrane, cytoplasm and genetic material enclosed in a nucleus.

  Bacterial cells (prokaryotic cells) are much smaller in comparison. They have cytoplasm and a cell membrane surrounded by a cell wall. The genetic material is not in a nucleus. It is a single DNA loop and there may be small rings of DNA called plasmids.