CAS BI 108 Chapter Notes - Chapter 1: Homeostasis, Eukaryote, Null Hypothesis

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3 Feb 2014
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Bi108 chapter 1 notes: the study of life. All life has a common ancestry: nearly universal genetic code (common set of amino acids) Life arose from non-life via chemical evolution: complex biological molecules arose through random physical association of chemicals, appearance of nucleic acids: crucial step for evol/life; molecules reproduce themselves (templates for synthesis of proteins) Cell structure evolved in common ancestor: complex proteins/bio molecules enclosed by membrane (compact internal environment, fatty acids can"t dissolve in water; membranous films. Biological info in genetic lang. common to all organisms. Genome: sum of all the dna molecules contained in each of its cells. Dna: long sequences of four different subunits (nucleotides sequence of four contain genetic info) Genes: specific segments of dna that encode the info the cell uses to create amino acids and form them into proteins. Population: group of individuals of the same type of organism (species)

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