Meiosis
What are the big ideas here? There are two cell divisions. Mitosis has one division and meiosis has two divisions. You still have to remember PMATI, but now you do it twice. You…
Mitosis
Eventually cells need to duplicate. There are two main methods of replication, mitosis and meiosis. This tutorial will talk about mitosis.The big idea to remember is that mitosis is the simple duplication…
The cell cycle
Actively dividing eukaryote cells pass through a series of stages known collectively as the cell cycle: two gap phases (G1 and G2); an S (for synthesis) phase, in which the genetic…
Microfilaments
You will find microfilaments in most cells. They are the partner of microtubules. They are long, thin, and stringy proteins (mainly actin) compared to the rounder, tube-shaped microtubules. We'd like to say you can…
Microtubules
Microtubules are usually discussed with microfilaments. Although they are both proteins that help define cell structure and movement, they are very different molecules. While microfilaments are thin, microtubules are thick, strong spirals…
Microfilaments – Stringy Proteins
You will find microfilaments in most cells. They are the partner of microtubules. They are long, thin, and stringy proteins (mainly actin) compared to the rounder, tube-shaped microtubules. We'd like to say you can…
What are actin filaments?
Actin filaments (F-actin) are linear polymers of globular actin (G-actin) subunits and occur as microfilaments in the cytoskeleton and as thin filaments, which are part of the contractile apparatus, in muscle…
What is Myosin?
An Introduction to the Myosin Superfamily of Proteins The most commonly described motor proteins belong to the Myosin superfamily. Different motor protein functions of the myosin family. A. Myosin I…
Cytoskeleton: Definition, Structure & Function
You probably already know the role your own skeleton plays in your life; it gives your body structure and helps you move. Without it, you would be more like a…
Membrane Models
The fluid-mosaic model was not the first scientifically accepted paradigm to describe membrane structure The first model that attempted to describe the position of proteins within the bilayer was proposed…
