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THE CELL
The cell theory
The _____ is the basic unit of all living things.
All ______________ are composed of one or more cells
All cells come from pre-existing _______.
Cell discovery
__________ __________ - discovered cells while looking at
cork cells. mid-1600s
__________ ______ ______________ - discovered life while
looking at pond water. mid-1600s
Mattias __________________ - all animals consists of cells. 1830s
Theodore _________________ - all plants consists of cells. 1830s
3 main parts of the cell:
1. Nucleus – The brain. The __________ is the control center of the cell.
It is the largest organelle in the cell and it contains the ______________ and
__________.
2. Cell membrane – Gives the cell shape and holds the _________________.
3. Cytoplasm – _______________ material that makes up most of the cell.
Most ___________ _____________ take place in the cytoplasm. All
organelles are suspended in the cytoplasm.
Nuclear membrane –

surrounds the ____________ and separates it from the rest of the cell.

allows ______________ in & out of the nucleus.
Nucleolus –
found within the nucleus and produces _______________.
Chromosomes –carries information that determines what
________ a living thing will have. Found within the _____________.
________(Deoxyribonucleic Acid) contains all the information for cells to live, perform their
functions and reproduce.
Cell membrane
The _____________ _____________ ______________
describes the structure of the plasma membrane.
The membrane is seen as a ____________ of phospholipids
in which protein molecules are embedded.
Fluid = ______________.
Mosaic = _____________ ______________.
Ribosomes
Found in the ______________, but most are attached to the _______________ _____________ (ER).
Ribosomes produce ______________.
Where are proteins needed? In the ___________ and exported elsewhere in the _____________.
Endoplasmic reticulum –
A network of membranes throughout the ________________.
Ribosomes are little factories that send proteins into the ____.
Transports materials in & outside the cell.
Below label the 3 main parts (nucleus, cell membrane & cytoplasm) and the nucleolus of the cell.
Also draw the smooth and rough Endoplasmic Reticulum to the left of the nucleus.
Mitochondria – organelle that converts
food molecules into __________(______).
Powerhouse of the cell. The process of
cellular _________________ occurs here.
Where are there more mitochondria, in skin cells or muscle cells?_______________
Vacuole – Liquid-filled space that stores ___________, _________ and ____________.
Vacuoles are _________ in plant cells.
Gives support - _____________ pressure.
Centrioles –
Helps with cell ________________.
Always found in _____________ next to the nucleus. Centrioles align _________ _______.
Chloroplasts
Found only in ____________ cells.
Contains green pigment (_______________),
that traps energy from the sun.
_______________ occurs here.
Cell wall
Found only in ____________ cells.
A thick covering outside the cell membrane.
The cell wall _______________ the cellular contents
& gives ____________ to the plant structure.
Lysosomes- (lysol)
contains ______________ ______________
to break down materials, such as worn out cells and bacteria.
Golgi bodies –
Receives proteins from rough ER. ________________ and delivers ____________ to needed areas.
Cytoskeleton
Made of microtubules, that give _____________ and _______________ to the cell.
Found within the cytoplasm.
Name one organelle that is found in an animal cell but not a plant cell: _________________.
Name two organelles that are only found in plant cells: ________________ & _______________.
List three differences between prokaryotic and eukaryotic cells.
1.
2.
3.