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B6A1Intro - The Science of Life What are the...

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The Science of Life Heyer 1 BIOLOGY bios - Gr.: “way of life” logos - Gr.: “words” -logia: “ a collection of writings and speeches” “a body of knowledge” What are the “Characteristics of Life” n Complexity & Order n Regulation – Homeostasis n Respond to changes in environment – Physiology – Behavior – Evolution n Harness energy - metabolism n Growth and reproduction – Inheritance - DNA - “Gene Theory” n Cellular structure - “Cell Theory” Biochemical Complexity & Order n Basic metabolic pathways Beta-carotene Vitamin A (2 molecules) Living cells carry out millions of chemical reactions that rearrange matter in significant ways Biological molecules have many atoms bound precisely in complex forms. How does the right rearrangement of the right bond at the right time happen? Biochemical Complexity & Order n Molecular machines Emergent Systems Analysis : attempting to map all interactions within the holistic living complex CELL Nucleus Cytoplasm Outer membrane and cell surface A systems map of known interactions among 3500 proteins in a fly cell Fig. 1.12
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The Science of Life Heyer 2 Structural Complexity & Order n Cellular complexity Structural Complexity & Order n Organismal complexity Structural Complexity & Order n Structure correlates with function! What are the “Characteristics of Life” n Complexity & Order n Regulation Homeostasis n Respond to changes in environment – Physiology – Behavior – Evolution n Harness energy - metabolism n Growth and reproduction – Inheritance - DNA - “Gene Theory” n Cellular structure - “Cell Theory” Biochemical Complexity & Order n Basic metabolic pathways Each step tightly regulated in rate, time & location Fig. 1-13b
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