Cell Theory Flashcards
Fun Fact: I love mommy
4 rules for Cell Theory
Cells…
are the basic unit of life
all living things are made of cells
Cannot spontaneously generate from non-living matter
Pass on genetic info to their devised offspring (cell division)
What are the exceptions to cell theory.
The first cell
Mitochondria + Chloroplast have DNA + reproduce on their own.
Viruses have their own genetic material that can reproduces in host cell.
What are Eukaryotic Cells
They have a true nucleus-membrane and membrane bound organelles (ex. Golgi, vacuoles, mitochondria etc.)
What are Prokaryotic Cells.
Not true nucleus w/membrane and no organelles (ex. bacteria)
Endosymbiotic theory
Answers the question “Where did mitochondria and chloroplasts come from?”
What is the answer?
They may have been Prokaryotic organisms engulfed by Eukaryotic Cells.
What is the purpose of a cell membrane?
It regulates the movement of materials in and out of the cells.
IF IT DIDN’T :)
It wouldn’t be able to maintain homeostasis.
What is the cell membrane made of?
A phospholipid bilayer.
Tell me about the cell membrane lipid molecule (phospholipid).
Phospholipids are made up of a hydrophilic head (water-loving) and two tails that are hydrophobic (water-fearing: repelled by water).
What does connect a phospholipid’s head and tail?
By glycerol.
What is a lipid bilayer?
function?
It is a fluid double-layered sheet that forms a barrier around the cell.
What is embedded in the lipid bi-layer.
Hint:”Channels and pumps formation.”
Different types of proteins that can float among the lipids. Some of those proteins can extend all the way thru the lipid bilayer and forms channels and pumps.
What is attached to the proteins and lipids in the lipid bi-layer.
Carbohydrate molecules and they extend beyond the cell membrane outside the cell.
What does the fluid mosaic model describe.
Describes the cell membrane with the lipid bilayer in which proteins and other molecules are embedded.
Is the cell membrane selective?
Yes ma’am, it is selectively permeable.
What is selectively permeable?
A property that allows certain matter to pass through a membrane but block others.
What does that do.
It helps maintain homeostasis a balanced internal environment.
