Cell Theory
All living things are made of ________.
Cells
What organelle contains DNA and controls the cell?
Nucleus
What cell structure controls what enters and leaves the cell?
Cell Membrane
The diffusion of water through a membrane is called what?
Osmosis
Organisms made of a single cell are called ________.
Unicellular
Cells come only from ________ cells.
Pre-existing
Which organelle powers the cell by producing ATP?
Mitochondria
Everything inside the cell except the nucleus is called what?
Cytoplasm
Passive transport moves molecules from ______ to ______ concentration.
High to Low
Prokaryotic cells lack what structure?
A nucleus
True or False: Cell theory is a perfect model that never changes.
False
What organelle builds proteins?
Ribosomes
Plants have this rigid supportive structure; animals do not.
Cell Wall
Which type of transport requires energy (ATP)?
Active Transport
A group of similar cells working together is called a ________.
Tissue
Which idea incorrectly claimed tiny people were inside sperm/eggs?
Preformation theory
Which organelle stores water and maintains turgor pressure in plants?
Central vacuole
Chloroplasts and leucoplasts belong to which organelle group?
Plastids
A cell placed in a hypotonic solution will ________.
Swell
A group of organs working together is called an ________.
Organ System
Why is cell theory considered a scientific model?
It may change with new evidence.
What organelle ships and packages materials like UPS?
Golgi apparatus
In the lipid bilayer, which part is hydrophobic—heads or tails?
Tails
What process moves large molecules OUT of the cell using vesicles?
Exocytosis
Name two structures found in plant cells but not animal cells.
Any two: cell wall, chloroplasts, central vacuole, leucoplasts