BIO 1140 Study Guide - Midterm Guide: Endoplasmic Reticulum, Cell Membrane, Golgi Apparatus

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Size varies from egg yolk to tiny bacteria. Cells are small due to surface area to volume ration. The greater the surface are the easier it is for the cell to maintain an adequate nutrient- waste exchange. If sa too large it is difficult to maintain internal cellular activities (lack of v) Produce/use basic forms of energy(atp) same form of cell wall/ plasma membrane. Name the different organelles and the roles/functions for each. Nucleoid- no membrane, where genetic material is located (highly folded mass of dna) Dna is a single circular molecule that unfolds when released from the cell. Dna encode the information required to make proteins. Ribosomes- use information in mrna to assemble amino acids into proteins. Prokaryotic ribosome consists of a small and large subunit, formed from a combination of ribosomal rna (rrna) and prokaryotic ribosomes contain three types of rrna copied from dne and more than 50 proteins. Cell wall- rigid external layer surrounding the plasma membrane.

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