Structure of a Cell

Look for cell wall, then check for a true nucleus, then identify organelles, then decide whether the cell is plant, animal, prokaryotic, or eukaryotic.

Use separate labelled diagrams of a plant cell, animal cell, and simple prokaryotic cell to show nucleus and cell wall differences.

Calling a bacterial cell eukaryotic because it has DNA is wrong; the key point is whether the DNA is enclosed in a true nucleus.

A cell has a basic plan with an outer boundary, living cytoplasm, and genetic material, arranged differently in different types of cells.

A cell has a basic plan with an outer boundary, living cytoplasm, and genetic material, arranged differently in different types of cells. Basic cell plan: boundary + cytoplasm + genetic material. Plant cells have cell wall outside the plasma membrane; animal cells do not. An onion peel cell has a cell wall, cell membrane, cytoplasm, and nucleus, while a bacterial cell has genetic material without a true nucleus.

In many eukaryotic cells, the cell membrane surrounds cytoplasm and a well-defined nucleus. Plant cells also have a cell wall outside the membrane. Prokaryotic cells do not have a true membrane-bound nucleus, while eukaryotic cells have a nucleus and membrane-bound organelles. Basic cell plan: boundary + cytoplasm + genetic material. Plant cells have cell wall outside the plasma membrane; animal cells do not. If a diagram shows a nucleus, mitochondria, and cell membrane but no cell wall, identify it as a eukaryotic animal cell rather than a plant cell. Students may be asked to label a cell diagram or distinguish prokaryotic and eukaryotic cells in a table. Calling a bacterial cell eukaryotic because it has DNA is wrong; the key point is whether the DNA is enclosed in a true nucleus.