Grade 9 - Unit 1 - Cell Theory & Cell Types and Structures Flashcards
Chem is way better than Bio
What is Cell Theory?
The idea that all living things are made up of at least one cell.
What are the 3 Parts of Cell Theory?
- All Living Organisms are composed of one or more cells
- The Cell is the Basic Unit of Life
- All Cells are produced from other cells
What are cells made up of?
Cells contain various parts called “Organelles”. These organelles make the cell function, and each has a different purpose
E.g. The mitochondria is the powerhouse of the cell
What do cells carry?
Cells carry DNA that is passed on from cell to cell.
What is the Energy Flow that occurs in cells called?
Metabolism
What is a cell?
A cell is the smallest functioning part of a multicellular organism, or a whole organism if its unicellular.
What is the Organization of Life?
Atoms > Molecules > Organelles (Means “small organ”) > Cells
Describe Prokaryotes
- Bacteria
- Unicellular
- Are small, simple cells
- Do not contain nuclei
Describe Eukaryotes
- Includes, plants, animals, fungi and protists
- can be unicellular or multicellular
- Do contain nuclei
- Are larger and more complex
- Have many organelles which have their own membranes
- Are highly specialized for their function
Both Prokaryotic and Eukaryotic cells have…
Both:
- have DNA
- have a Cell membrane
- have ribosomes (to make protein)
Only Prokaryotic Cells are…
Small, Simple, Unicellular Bacteria with no nucleus
Only Eukaryotic Cells are…
Complex, uni- or multicellular with many organelles like cytoplasm, lysosomes and a nucleus
What are Cell Walls?
Cell Walls are the outermost layer in Plant Cells. They exist as a sort of replacement for bones, while also protecting the cell
What is the Cell Membrane?
Plasma membrane, in most cells. Usually located within the Cell Wall. It controls what goes in and out of the cell
What is the Purpose of the Cell Membrane?
Control the materials entering & leaving the cell
Supports the cell
