BIOL 1201 : Test 1
Document Summary
Theory has no evidence as back up. Atmosphere: barely trace amounts of oxygen present, frequent storms with lots of lightening to start reactions, frequent volcanic eruptions, frequent meteor impacts, uv light from the sun because of no ozone. Earth is about 4. 6 billion years old: found out through dating of moon rocks. Boil water add gases from early atmosphere in a spark chamber. After a few days simple organic compounds like nucleotides and amino acids formed. Separate the living thing from the outside environment (cell membrane) Now: dna -> rna -> protein: need proteins to synthesize more dna. How did early cells do it: ribozymes: rna molecule that can catalyze reactions, especially those involved in synthesis and processing of rna, conclusion: earliest cells used rna to store information, ribozymes to catalyze reactions. Dna in eukaryotes is found in the nucleus. Dna not stored in nucleus of bacteria or archaea because they have no nucleus.
