Cell Theory
State one principle of cell theory.
All living things are made of cells OR cells come from other cells OR cells are the basic unit of life
What organelle controls the cell?
Nucleus
The membrane is made of __________________.
Phospholipid bilayer
Which microscope did early scientists use?
Light microscope
A cell in hypotonic solution will…
Swell
Why were cells not studied before microscopes?
They were too small to see.
Which organelle produces energy for the cell?
Mitochondria
Define diffusion
movement from high concentration to low
What does magnification mean?
How much larger an image appears
A cell in hypertonic solution will…
shrink
Compare prokaryotic and eukaryotic cells.
Prokaryotic have no nucleus; eukaryotic have a nucleus.
What organelle packages proteins?
Golgi apparatus
What is selective permeability?
Only some things can pass through
Total magnification: 10x eyepiece and 40x objective.
400x
What happened to food coloring in hot water?
Spread faster
Explain how cell theory changed science.
It proved all living organisms share a basic structure and origin.
What organelle breaks down waste?
Lysosome
What does cholesterol do in the membrane?
Prevents tails from sticking together
Why are microscopes important for biology?
They revealed cells
What is Osmosis
water movement across a membrane
How did advancements in microscope technology contribute to the development of modern cell theory
You can see the cells to develop cell theory.
Plants have chloroplasts and a large… what?
Vacuole
What is the difference between passive and active transport?
Passive requires no energy; active requires energy (ATP)
Which microscope shows more detail, light or electron? Why?
Electron, because it uses electrons for higher resolution
Explain why cold water slowed diffusion.
Less kinetic energy, slower particle movement