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Eukaryotic Cells

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IB Biology SL III Ryan Martucci Topic: 1 - Cells Date: 9-25-02 Period: 4th Sub-topic: 1.3 - Eukaryotic Cells 1.3.1 1 Draw a diagram to show the ultrastructure of a generalized animal cell as seen in electron micrographs. This drawing is located at the end of this sub-topic. 1.3.2 1 State one function of each of these organelles: ribosomes, rough endoplasmic reticulum(ER), lysosome, Golgi apparatus, and mitochondrion. Pervading most of the cytoplasm is the ER, a labrybnith of membranes forming flattened sacs and tubes that segregate the contents of the ER from the cytosol. The ER takes two forms, rough and smooth. ...read more.


Topic: 1 - Cells Sub-topic: 1.3 - Eukaryotic Cells Page: 2 1.3.3 2 Compare prokaryotic and eukaryotic cells. Prokaryote cells have ribosomes and a cell membrane made out of plasma and do not have a nucleus. Its DNA is concentrated in a region called the nucleoid, but no membrane separates this region from the rest of the cell. In contrast eukaryotic cells has a true nucleus enclosed by a membranous nuclear envelope. The entire region between the nucleus and the membrane bounding the cell is called the cytoplasm. It consists of a semifluid medium called the cytosol, in which are located organelles of specialized form and function, most of them absent in prokaryotic cells. ...read more.


The animal cells have structures, which the plant cells do not have also and they are centriole, glycogen granules, and pinocytas. 1.3.5 1 State the composition and function of the plant cell wall. The plant cell wall is one of the features that makes a difference from the animal cells structures. The cell wall protects the plant cell, maintains its Topic: 1 - Cells Sub-topic: 1.3 - Eukaryotic Cells Page: 3 shape, and prevents excessive uptake of water into the cell. The cell walls in plants are much thicker and the chemical composition of the wall varies from species to species, but the basic design of the wall is consistent. Microfibrils made of other polysaccharides and proteins. This combination of materials, strong fibers in a matrix, is the same basic design found in reinforced concrete. ...read more.

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