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Chapter 5 Lesson 3 Information Organelles Mrs. Park 12/9/2015 Objectives • Identify the nucleus of a cell • Describe structures found in the nucleus • Explain the structure and functions of ribosomes • Discuss how the nucleus directs cell activities Vocabulary • • • • • • Nuclear envelope Pore Nucleolus Ribosome Genome Chromosome Organelles • Small structures in the cell • Have specific jobs • Have bilayer membranes The Nucleus • Largest organelle • Control center of the cell • Surrounded by a membrane called nuclear envelope. Nuclear Envelope • • • • Covers the nucleus Bilayer Has holes called pores Pores allow messages in and out Inside the Nucleus • Nucleolus – Ball of fibers – Makes an information organelle, the ribosome • Holds the DNA of the individual . DNA • Instructions to make proteins and another organism. • Complete strand is a genome. • A molecule of DNA is a chromosome • Gene is a specific sequence of DNA • It folds and coils to fit in the nucleus Ribosomes • Information organelle • Made from RNA and proteins • Make proteins • Found in the cytoplasm • Found on endoplastic reticulum • Help control cell activities Putting it together • Create a foldable or a web of the organelles. Added Practice • Go to http://www.biology4kids.com/ to practice • To test yourself, go to http://www.biology4kids.com/extras/quiz_cell organ/index.html
