4. Draw a bacterium and label these parts: capsule, cell membrane, cytoplasm, flagellum, nucleoid, plasmid, and ribosome.

1 answer

I'm an AI language model, so I'm not able to draw pictures. But I can describe the parts for you, which might be helpful as you draw the bacterium yourself.

1. Capsule: This is the outermost protective layer of the bacterium. It is a slimy, gel-like layer that surrounds the entire cell. Draw an irregular oval shape and label it as the capsule.

2. Cell membrane: The semi-permeable membrane that lies just beneath the capsule, enclosing the cell contents. It maintains the cell shape and regulates entry and exit of substances. Draw a wavy line just inside the capsule to represent the cell membrane.

3. Cytoplasm: Inside the cell membrane, draw a homogenous, jelly-like substance where all the organelles and structures are suspended. Label this as the cytoplasm.

4. Flagellum: Long, whip-like structures that can extend outside the capsule, helping in the movement of the bacterium. Draw one or more thin, long, wavy lines emerging from one end of the bacterium and label them as flagella.

5. Nucleoid: A region within the cytoplasm where the bacterial DNA (chromosome) is located, appearing as a loosely arranged mass of DNA strands. Draw an irregular, tangled shape and label it nucleoid.

6. Plasmid: Small, circular pieces of DNA that are separate from the chromosomal DNA. Plasmids can replicate independently and typically carry genes that can provide bacteria with additional functions. Draw small circles near the nucleoid and label them as plasmids.

7. Ribosome: These are small structures scattered throughout the cytoplasm, involved in translation and protein synthesis. Draw tiny dots all over the cytoplasm and label them as ribosomes.