BIOLOGY 151 Study Guide - Midterm Guide: Cellular Respiration, Protein Structure, Cell Nucleus

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Tending to repel or fail to mix with water. Gene expression: transcription and translation: transcription: mrna copies gene sequence (replaces uracil with thymine), translation: ribosomes read mrna sequence and translate it into amino acid sequences (aug is the starting protein). The coded genetic information hard-wired into dna is transcribed into individual transportable cassettes, composed of rna (mrna); each mrna cassette contains the program for synthesis of a particular protein (or small number of proteins). Embryonic stem cells are derived from embryos, mostly from eggs fertilizes in vitro, not in a woman"s body. Cells whose job is to divide and create more cells and differentiate into cells with specialized functions. (differentiated cells cannot divide) How are embryonic stem cells stimulated to differentiate: If cells are grown appropriately, they remain unspecialized. If cells are allowed to clump, they differentiate (embryoid bodies). Change the chemical composition of the medium. Alter the surface of the culture dish.

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