BIO 101 Lecture Notes - Lecture 4: Tubulin, Nucleoid, Globular Protein
Document Summary
A cell is the smallest unit of a living thing. Cells are the basic building blocks of all organisms. Tissue: consists of several cells of one kind that interconnect with each other and perform a shared function. Organ: the combination of several tissues (ex. stomach, heart, brain) Organ system: composed of several organs (ex. digestive system, circulatory system: organism: composed of several organ systems that function together. Cell theory (established by schleiden and schwann): all living things are composed of one or more cells, the cell is the basic unit of life, new cells arise from existing cells. All cells (eukaryotic + prokaryotic) share four common components: 4. 2 prokaryotic cells: plasma membrane: an outer covering that separates the (cid:272)ell"s i(cid:374)terior fro(cid:373) its environment, cytoplasm: jelly-like cytosol in which cell components are found, dna: the genetic material of the cell, ribosomes: synthesize proteins. Prokaryote: a simple, mostly single-celled organism that lacks a nucleus and membrane-bound organelles.
