The material inside the cell membrane of a bacterium is called the ________________

The material inside the cell membrane of a bacterium is called the ________________

• A. Cytoplasm
• B. Nucleus
• C. Nucleoid
• D. Ribosome

Answer: (A)

Inside a bacterium, the cytoplasm fills the cell and includes the cytosol and all the cellular components suspended in it. Bacteria are prokaryotes, so they don’t have a membrane-bound nucleus; their DNA sits in the nucleoid region inside the cytoplasm. The nucleus is a feature of eukaryotic cells. Ribosomes, the machines that make proteins, are also found in the cytoplasm, but they are just part of it, not the entire interior. Therefore, the material inside the cell membrane is cytoplasm.

Inside a bacterium, the cytoplasm fills the cell and includes the cytosol and all the cellular components suspended in it. Bacteria are prokaryotes, so they don’t have a membrane-bound nucleus; their DNA sits in the nucleoid region inside the cytoplasm. The nucleus is a feature of eukaryotic cells. Ribosomes, the machines that make proteins, are also found in the cytoplasm, but they are just part of it, not the entire interior. Therefore, the material inside the cell membrane is cytoplasm.