Biology – 2.1 Cell structure | e-Consult

Plant and animal cells are both eukaryotic cells, meaning they have a nucleus and other membrane-bound organelles. However, there are key structural differences reflecting their distinct functions.

Cell Wall: Plant cells possess a rigid cell wall located outside the cell membrane. This wall is primarily composed of cellulose, providing structural support, protection, and maintaining cell shape. Animal cells lack a cell wall.

Cell Membrane: Both plant and animal cells have a cell membrane, a phospholipid bilayer that regulates the passage of substances into and out of the cell. It maintains the cell's internal environment and allows for communication with other cells.

Nucleus: Both cell types contain a nucleus, which houses the cell's genetic material (DNA) in the form of chromosomes. The nucleus controls cell activities and is essential for cell division.

Cytoplasm: The cytoplasm is the gel-like substance filling the cell, surrounding the organelles. It's where many metabolic reactions occur. Both cell types have cytoplasm.

Chloroplasts: Plant cells contain chloroplasts, organelles responsible for photosynthesis. Chloroplasts contain chlorophyll, which captures light energy to convert carbon dioxide and water into glucose. Animal cells do not have chloroplasts.

Ribosomes: Both plant and animal cells have ribosomes, which are responsible for protein synthesis. They can be found free in the cytoplasm or attached to the endoplasmic reticulum.

Mitochondria: Both cell types have mitochondria, the powerhouses of the cell. They carry out cellular respiration, converting glucose into energy (ATP).

Vacuoles: Plant cells typically have a large central vacuole that stores water, nutrients, and waste products. It also helps maintain cell turgor pressure. Animal cells may have smaller vacuoles, primarily for storage.

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