A2.2.4 - Structures Common to All Cells Flashcards
Typical cells have DNA as genetic material & a cytoplasm composed mainly of water, which is enclosed by a plasma membrane composed of lipids. Students should understand the reasons for these structures.
1
Q
What are some cell components common to all cells?
A
- DNA as the genetic material
- Cytoplasm
- Plasma membrane
→ Associated w/ proteins & phosphorus
2
Q
Why is DNA important for cells?
A
- Contains the instructions needed for the cell to survive, mature & replicate
3
Q
Why is the cytoplasm important?
A
- Where many chemical reactions occur
- Contains many dissolved solutes (i.e. carbon compounds, nutrients, ions, inorganic compounds & waste products)
- Suspends other cell structures
4
Q
Why is the plasma membrane important?
A
- Separates the interior of the cell from the exterior environment
→ Controls interactions between a cell’s contents & the exterior
→ i.e. waste products transported out of cell
→ i.e. materials needed transported into cell - Membrane proteins helps provide identity properties
→ Helps engage in communication & transport between cells
5
Q
What is the cytoplasm & plasma membrane mainly composed of?
A
- Cytoplasm: Water (Cytosol)
- Plasma membrane: Bilayer of phospholipids
