Cell Theory/Theory vs Law
What is a scientific law?
Describes what happens in nature
What are the two election microscopes we discussed in class?
Transmission Electron Microscope & Scanning Electron Microscope
True or False. Prokaryotes have a nucleus.
False
What are the four basic macromolecules?
Carbohydrates, Lipids, Nucleic Acids, Lipids
True or False. Both plant and animal cells have chloroplasts.
False.
What is a scientific theory?
What adjusts light on a compound microscope?
Diaphragm
True or False. The smooth ER has ribosomes attached to it.
False.
What is cohesion?
Cohesion is the attractive force between molecules of the same substance, such as water molecules sticking to each other
What is the cytoplasm?
The cytoplasm is all the cellular material inside the plasma membrane, consisting of a jelly-like substance called cytosol and containing all the cell's organelles.
Why is "the cell theory" a theory?
It explains WHAT cells do and WHY.
How do we calculate total magnification?
Multiply the eyepiece and the objective lens you are using. (ex: 10X x 4X = 40X)
Define a hypotonic solution.
The concentration of solute molecules outside the cell is lower than the concentration of solutes inside the cell.
Which macromolecule has a phosphate group in their structure? (Remember CHO, CHO, CHON, CHONP)
Nucleic Acids
True or False. Osmosis is the passive net movement of particles.
False. Osmosis is the natural movement of WATER from a place with more water to a place with less water.
What are the three tools scientists use to understand the world?
Observations, Experiments, Models
What scientists came up with the word "cells"?
Robert Hooke
What model is used to describe the nature of membranes in cells?
The Fluid Mosaic Model
Which macromolecule has long chains of C-H bonds?
Lipids
What is the purpose of the mitochondria?
Cellular respiration
What are the three statements of the cell theory?
1. All organisms are composed of cells
2. Cells are the basic unit of life
3. All existing cells are produced by other living cells
Which electron microscope is used to visualize surfaces of object?
Scanning electron microscope
These describe what structure?
• Is a boundary between a cell and the outside environment
• Controls the movement of materials into and out of the cell
• Double layer of phospholipids
Cell membrane
What is the purpose of water having a high specific heat?
Resist and regulates temperature change.
What organelle creates turgor pressure to give strength and support plant cells?
The central vacuole.