BI110 Lecture Notes - Lecture 6: Cell Nucleus, Lightning, Bacteriophage
Document Summary
Seven characteristics of life: they are emergent, require the cooperation of a combination of factors in order for the properties to become apparent or non-dormant. Is a virus alive: virus --> has a protein shell and some sort of nucleic acid within, bacteriophage --> attack bacterium durr , have some properties of life: The evolution of major forms of life: earth is thought to be 4. 6 billion years old, early earth was incredibly hot. Took an estimated 500 million years too cool down enough to potentially be able to support life. Oxygen atoms existed in water; oxygen gas was not abundant in the atmosphere. Primitive (early) earth w/o various biological molecules (i. e. macromolecules) Macromolecules: fundamental building blocks of life. Lipids: all, but lipids, are polymers (compound of smaller molecules, all are a product of metabolic pathways. Formation of biologically important molecules: oparin-haldane hypothesis. Organic molecules that form simple molecules could"ve been formed in conditions that prevailed on primitive earth.
