Biology 121 | 141 Exam Questions And Answers

Hiearchy of life order - ️️bio-eco-com-pop-organism-organ syst-organ-tissue-cell-organelle-molecule-atom /each step causes new properties to emerge as result of interaction among lower level components systems biology - ️️model dynamic behavior of a whole biological systems based on a study of interactions among systems parts reductionism - ️️complex systems broken down to simpler components that are more manageable to study Energy - ️️energy from sunlight-converted to chemical energy by producers-passed to consumers cell - ️️organisms basic unit of structure and function eukaryotic cells - ️️contain membrane-enclosed organelles including dna-containing nucleus prokaryotic cells - ️️lack dna containing nucleus or membrane DNA - ️️long linear polymer in the nucleus of cell formed from nucleotides and shaped like a double helix transfers heritable info from parents to offspring gene expression - ️️conversion of the information encoded in a gene first into messenger RNA and then to a protein genomics - ️️study and comparison of genomes within a single species or among different species