Want to start a small business but don’t want to work for someone else? Yeah, you’re in luck! I’m going to share some small business ideas that don’t require a lot of investment but offer high profits. No matter what you’re looking for, there are plenty of opportunities for you to explore and succeed, whether … Read more
Cell Nucleus Definition The cell nucleus is a large organelle in eukaryotic organisms which protects the majority of the DNA within each cell. The nucleus also produces the necessary precursors for protein synthesis. The DNA housed within the cell nucleus contains the information necessary for the creation of the majority of the proteins needed to … Read more
Lysosome Definition Lysosomes are specialized vesicles within cells that digest large molecules through the use of hydrolytic enzymes. Vesicles are small spheres of fluid surrounded by a lipid bilayer membrane, and they have roles in transporting molecules within the cell. Lysosomes are only found in animal cells; a human cell contains around 300 of them. … Read more
Heme Definition A heme is an organic, ring-shaped molecule. Due to its special structure, a heme is capable of holding, or “hosting” an iron molecule. A heme is made from 4 pyrroles, which are small pentagon-shaped molecules made from 4 carbons and 1 nitrogen. Four pyrroles together form a tetrapyrrole. If the tetrapyrrole has substitutions … Read more
Essentially, a solute is a substance that can be dissolved by a solvent to form a solution. There are many types of solutes. It can be a gas, a liquid, or a solid. Solvents break up solute molecules and distribute them evenly, thereby dissolving them. As a result, a homogeneous mixture, or solution, is created. … Read more
Cells of the brain can be divided into two main types; these are neurons and glial cells. The adult human brain is thought to consist of around 86 billion neurons and around the same number of glial cells. Neurons are the fundamental units of the brain and are responsible for receiving sensory information from the … Read more
Coenzyme Definition A coenzyme is an organic non-protein compound that binds with an enzyme to catalyze a reaction. Coenzymes are often broadly called cofactors, but they are chemically different. A coenzyme cannot function alone, but can be reused several times when paired with an enzyme. Functions of Coenzymes An enzyme without a coenzyme is called … Read more
Sucrose Definition Sucrose, commonly known as “table sugar” or “cane sugar”, is a carbohydrate formed from the combination of glucose and fructose. Glucose is the simple carbohydrate formed as a result of photosynthesis. Fructose is nearly identical, except for the location of a double-bonded oxygen. They are both six-carbon molecules, but fructose has a slightly … Read more
Prometaphase Definition Prometaphase is the stage of eukaryotic cell division that falls between prophase and metaphase. During prophase, the cell’s chromosomes have condensed and the cell’s centrosome, or microtubule organizing center, has divided and moved to opposite sides of the cell. During prometaphase, several key steps take place, including the breakdown of the nuclear envelope … Read more
Pinocytosis Definition Pinocytosis is the process by which a cell absorbs small particles from the outside and brings them inside. Pinocytosis means “drinking from cells” in Greek. During this process, the cell surrounds particles and then pinches off part of its membrane to enclose them in vesicles, which are small spheres of membrane. Extracellular fluid … Read more