3.2 cell organelles topic: cell organelles objective: identify the functions of the major cell...
DESCRIPTION
3.2 Cell Organelles Cells have an internal structure. The cytoskeleton has many functions. – –“cyto” means cell….” – –supports and shapes cell – –helps position and transport organelles – –provides strengthTRANSCRIPT
3.2 Cell Organelles
Topic: Cell OrganellesObjective: Identify the functions of the major cell
organelles.
3.2 Cell Organelles
EUKARYOTES VS PROKARYOTES
--Eukaryotic (EU sounds like DO) cells have a nucleus “kary” means kernel or nucleus
--Prokaryotic cells (PRO sounds like NO) do not have a nucleus.• Prokaryotic cells do not have membrane-bound organelles either
3.2 Cell Organelles
Cells have an internal structure.• The cytoskeleton has many functions.
– “cyto” means cell….”– supports and shapes cell– helps position and transport organelles– provides strength
3.2 Cell Organelles
Several organelles are involved in making and processing proteins.• The nucleus stores genetic information
3.2 Cell Organelles
Several organelles are involved in making and processing proteins.• Endoplasmic Reticulum (ER) assists in transportation
through the cell• There are two types:
– rough endoplasmic reticulum
– smooth endoplasmic reticulum
3.2 Cell Organelles
Several organelles are involved in making and processing proteins. (continued)• Ribosomes link amino acids to form proteins
• Golgi apparatus processes, sorts, packaGes and delivers proteins
3.2 Cell Organelles
Several organelles are involved in making and processing proteins. (continued)• Vesicles are membrane-bound sacs that hold materials.
3.2 Cell Organelles
Other organelles have various functions.• Mitochondria supply energy to the cell
3.2 Cell Organelles
Other organelles have various functions.• Vacuoles are fluid-filled sacs that hold and store materials
like food and water – WAY BIGGER IN PLANT CELLS!WAY BIGGER IN PLANT CELLS!
3.2 Cell Organelles
Other organelles have various functions.• Lysosomes contain enzymes to digest material
3.2 Cell Organelles
Other organelles have various functions.• Centrioles are tubes
– Centrioles help divide DNA.
– Only in ANIMAL CELLS
3.2 Cell Organelles
Plant cells have cell walls and chloroplasts.• A cell wall provides rigid support-
– Only in PLANT cells and some bacteriaOnly in PLANT cells and some bacteria
3.2 Cell Organelles
Plant cells have cell walls and chloroplasts.• Chloroplasts convert solar energy to chemical energy
(photosynthesis). Only in PLANT cells.