lOMoARcPSD|28205643 2023 HESI BIOLOGY AND ANATOMY COMPLETE STUDY GUIDEBIOLOGY Taxonomy: is the classication of living and extinct organisms, otherwise known as biological classication or the hierarchic organizational system. -Kingdom -Phylum -Class -Order -Family -Genus -Species Cells: Organelles Nucleus: the cells command center, stores the cells DNA. Controls all of the cells activities, such as growth and metabolism, using the DNAs genetic information. Within the nucleus is a smaller structure called the nucleolus Nucleolus: houses the RNA (ribonucleic acid). RNA helps convey the DNAs orders to the rest of the cell and serves as a template for protein synthesis. Ribosomes: translates instructions to produce proteins, read RNA produced in the nucleus and translate instructions in order to produce proteins, Bound ribosomes can be found in the endoplasmic reticulum and Free ribosomes can be found in the cytoplasm Rough ER: are studded with ribosomes and are involved with protein manufacture. Smooth endoplasmic reticulum (SER) function involves manufacturing and packaging, including the synthesis of lipids and hormones which are used for the production of new cellular membranes. Golgi apparatus(post ofce of the cell) : responsible forpackaging proteins into vesicles and sending them out to the correct destinations within the cell, where the proteins