Honors Biology Chapter 7 Section 2 Eukaryotic Cell Structure.
SC B -2.2: Summarize the structures & functions of organelles found in a eukaryotic cell(including the nucleus, mitochondria, chloroplasts, lysosomes, vacuoles, ribosomes, endoplasmic reticulum [ER], golgi apparatus, cilia, flagella, cell membrane, nuclear membrane, and cytoplasm
Portion of the cell including everything inside cell membrane except nucleus
Cytosol: liquid portion of cytoplasm
chromatin: DNA bound to proteins (called histones)
Chromatin condenses into chromosomes when cell starts cell division
Considering the function of ribosomes…. What types of cells do you think would have an abundance of ribosomes in them?
Internal membrane system
Smooth ER (SER)
Rough ER (RER)
So… considering the functions of SER……what types of cells can you predict might have an abundance of SER?
“rough” because outer membrane is studded with ribosomes
proteins made & released into RER where they are modified (sugar groups added making a glycoprotein)
most of proteins made here are destined for export out of cell
What type of cell do you think would have lots of RER?
stack of curved membranes
usually found between ER and cell membrane
Function: modify, sort, & package material received from ER storage in cell or export out of cell
In what types of cells do you think there would be an abundance of Golgi bodies?
membrane bounded storage facility
Protists (one-celled organisms) put food particles in a food vacuole until need the nutrients
plant cells have distinctive large central vacuole that stores water and some nutrients and helps plant maintain turgor when all cells have a filled central vacuole
Made of proteins
made of actin
supports cell shape
used by protist for movement
used to move organelles around cytoplasm
shaped like hollow straws with units that spontaneously come together or fall apart
used to move organelles, chromosomes
made in centrosomes