Cell Biology Concepts

Organisms that contain a true nucleus and membrane bound organelles.

• Prokaryote

• Eukaryote

• Virus

• Bacteriophage

The central membrane bound organelle that manages cellular functions and contains DNA.

• Mitochondria

• Ribosome

• Nucleus

• Endoplasmic Reticulum

Flexible boundary between the cells and its environment. Allows materials such as water and nutrients to enter and waste products to leave.

• Cell wall

• Cytoplasm

• Plasma membrane

• Nucleus

The idea that (1) all organisms are composed of 1 or more cells, (2) the cell is the basic unit of structure and organization of organisms and, (3) all cells come from preexisting cells.

• Cell theory

• Gene theory

• Evolutionary theory

• Homeostasis theory

An instrument that uses light and a series of lenses to magnify objects in steps; can magnify up to 1 500 times its original size.

• Compound light microscope

• Simple light microscope

• Electron microscope

• Digital microscope

Structural model of the plasma membrane where molecules are free to move sideways within the membrane.

• Fluid mosaic model

• Static bilayer model

• Rigid structure model

• Fixed mosaic model

Organisms that do not contain a membrane bound nucleus.

• Eukaryote

• Prokaryote

• Virus

• Fungi

Feature of the plasma membrane that maintains homeostasis within the cell by allowing some molecules into the cell while keeping others out.

• Selective permeability

• Passive diffusion

• Active transport

• Osmosis

Lipids with an attached phosphate group. Plasma membranes are composed of this with embedded proteins.

• Triglyceride

• Cholesterol

• Phospholipid

• Steroid

The basic unit of all organisms.

• Tissue

• Organ

• Cell

• Molecule