EEMB 3 Lecture Notes - Lecture 3: Radiocarbon Dating, Thomas Cech, Metastability
18 Apr 2019
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Q: which of the following is true: dna is known to carry out enzymatic activity, proteins are generally self replicating, most rna is double stranded, all are true, none are true. Dna transcription mrna translation protein (polypeptide) Ribozymes catalyst & information carrier catalytic rna. Protocell that acts like a biotic cell. Led to discovery of the rna world. 4) membrane formation changes internal chemistry, allowing new functionality. 5) rna codes both dna & protein. Dna becomes master template; proteins catalyze cellular activities. More diverse proteins = organism can adapt to change & respond more effectively. Dna is extremely stable cells with dna were naturally selected for dominant way of passing down information. History of life: dating - biostratigraphy: fossils, stratigraphic relationship, can determine relative ages of fossils. Similar types of fossils found within strata in widely separated parts of the earth: major changes in fossil types in the rock strata used to define time periods.
