ATI TEAS 6 EXAM Science Study Guide 2023(2024) Revisions Cell ➢ Cell: basic organizational unit of all living things. One thing in common is they all have membranes (phospholipids). ➢ Cell structure organization: All cells contain DNA, and RNA & can synthesize proteins. Consists of nucleic acids, cytoplasm, and cell membrane. o Tissues: Cells that are grouped together o Organs: Tissues that are grouped together o Systems: Organs that are grouped together o Organism: A complete individual ➢ Nuclear parts of a cell o Nucleus: contains chromosomes, & regulates DNA of the cell. Defining structure of eukaryotic cells (they all have nucleus). Passes genetic traits between generations. Contains nuclear envelop, nucleoplasm, nucleolus, nuclear pores, chromatin, & ribosomes. o Chromosomes: thread like rods of DNA. Short deoxyribonucleic acid, DNA is the genetic material that stores information about the plant/animal. o Chromatin: DNA & Protein makeup chromosomes o Nucleolus: Proteins, small/round doesn’t have membrane. Protein synthesis, synthesizes & stores RNA. o Nuclear envelope: Encloses structures within nucleus. Made of lipids. o Nuclear pores: Exchange materials between the nucleus * cytoplasm o Nucleoplasm: Liquid like cytoplasm, within nucleus. Cell Membranes