BIO 1140 Chapter Notes - Chapter 1: Ribosomal Rna, Microvillus, Cell Membrane

• School: University of Ottawa
• Department: Biology
• Course: BIO 1140
• Professor: Caroline Petit- Turcotte

Document Summary

The study of life revels common themes: reductionism=zooming in at ever-finer resolution which reduces complex systems to simpler components that are more manageable to study. Lack membrane enclosed organelles: eukaryotes=all other forms of life, membrane enclosed organelles, nucleus. Life"s processes i(cid:374)volve the expressio(cid:374) a(cid:374)d tra(cid:374)s(cid:373)issio(cid:374) of ge(cid:374)etic i(cid:374)for(cid:373)atio(cid:374: dna=genetic material and is found in chromosomes, dna the genetic material. In cells about to divide chromosomes are visible using dye. Life requires the transfer and transformation of energy and matter. Life organisms use energy to (cid:272)arry out life"s a(cid:272)ti(cid:448)ities: producers=plants and organisms that use photosynthesis to make their own food, consumers=organisms that feed on producers and other consumers. From molecules to ecosystems, interactions are important in biological systems: molecules: interactions within organisms, feedback regulation=output or product of a process regulates that very process (negative/positive feedback, e(cid:272)osyste(cid:373)s: a(cid:374) orga(cid:374)is(cid:373)"s i(cid:374)tera(cid:272)tio(cid:374)s (cid:449)ith other orga(cid:374)is(cid:373)s a(cid:374)d the physi(cid:272)al e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)t. Ionic bonds: more electronegative atom strips an electron completely away from its partner.