BIO 101 Lecture Notes - Lecture 7: Prokaryote, Eukaryote, Mitochondrion
7 Nov 2016
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Document Summary
The cell: the smallest unit of life that can function independently and perform all the necessary functions of life, including reproducing itself. Robert hook was the first person to talk about cells. A cell is a 3d structure, in which many of the essential chemical reactions of life take place. Nearly all cell contain dna (deoxyribonucleic acid) Prokaryotic cells are structurally simple, but there are many types of them. Plasma membrane: encloses cell contents: dna, ribosomes, and cytoplasm. Ribosomes: in cytoplasm, concerts genetic information into protein structure. Dna: 1 or more circular loops containing genetic info. Cell wall: protects and give shape to the cell. Pili: hair like projections that help cells attach to other surfaces. Flagellum: whip like projections that aids in cellular movement (only human cell that has it is sperm) Endosymbiosis theory: developed to explain the presence of 2 organelles in eukaryotes, chloroplasts in plants and algae, and mitochondria in plants and animals.
