BIOL10004 Lecture Notes - Lecture 2: Meiosis, Resting Spore, Anoxygenic Photosynthesis
30 Jul 2018
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Lecture 2- structure & function of prokaryotic cells. Generates atp in similar process to eukaryotes. Chromosome replication using dna polymerase: significance of cyanobacteria to the evolution of life on earth? radiation, first inhabitants of earth, photosynthetic cyanobacteria= oxygen, less co2, ammonia, methane , cyanobacteria contain chlorophyll photosynthesising & release o2. 2 billion years for earth to build-up free o2 change earth"s atmosphere. Ozone layer allowed life to move onto land from the ocean great. Huge numbers of anaerobic organisms died/retreated to areas with low. Prokaryotes: cell wall semi rigid (antibiotics target this cell wall) Gives structure, allows them to take on a wide range of shapes. Allows cells to accumulate things that it needs but prevents unneeded material from entering: cytoplasm- interior of cell, plasma membrane semi permeable, dna linear. Cytoplasm contains circular dna in nucleoid. Use sequence of nucleotides code protein synthesis. Bacterial ribosomes can attach directly to mrna molecules: ribosome.
