BIOL 2303 Lecture Notes - Lecture 2: Lipid Bilayer, Cell Membrane, Nuclear Membrane

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Some features distinguishing prokaryotic and eukaryotic cells are. Bounded by a nuclear membrane having pores connecting it with the endoplasmic reticulum. Contains one or more paired, linear chromosomes composed of dna associated with histone proteins. Usually but not always contain one circular chromosome composed of dna associated with histone-like proteins. No nucleus, but contain a similar body called a nucleoid. Cytoplasmic membrane and is a fluid phospholipid bilayer containing sterols as well as carbohydrates. Capable of endocytosis (take things inside) and exocytosis (take things outside) Cytoplasmic membrane; is a fluid phospholipid bilayer without carbs and usually lacking sterols, Many bacteria do contain sterol-like molecules called hopanoids. Ribosomes composed of a 60s and 40s subunit. (ribosome= macromolecule, not an organelle, function is to make proteins) Internal membrane- bound organelles such as mitochondria, endoplasmic reticulum, golgi apparatus, vacuoles, and lysosomes are present.

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