Biology & Organic Chemistry: Video Series

Phosphorous is an essential component of life because it is a major component of ATP, which is how cells store energy. Learn about the role of phosphorous as an essential component of DNA and RNA with help from a science teacher and field biologist in this free video on biology.

Chlorophyll is the green pigment inside of the leaves of plants that captures sunlight, and its function is to pass down excited electrons to a reaction center. Learn more about the process of photosynthesis with help from a science teacher and field biologist in this free video on biology.

Protozoans are usually unicellular eukaryotes, and their function can be to consume bacteria, fungi and microinvertebrates. Discover how some protozoans are used as major decomposers with help from a science teacher and field biologist in this free video on biology.

Metabolism refers to all of the chemical reactions that take place inside of organisms to allow life to occur. Learn about the categories of metabolism, such as catabolism and anabolism, with help from a science teacher and field biologist in this free video on biology.

The nitrogen cycle refers to the way that nitrogen moves through the environment, a process that begins in the atmosphere and moves as nitrogen is changed into a usable form. Learn about the process of fixation with help from a science teacher and field biologist in this free video on biology.

The equation of cellular respiration shows that when oxygen is by itself, it forms six carbon dioxide, six water and energy, which is the key component of the process. Discover how cellular respiration turns glucose into a usable form of energy with help from a science teacher and field biologist in this free video on chemistry.

Nitrogen fixation is the process of turning nitrogen gas into forms that are usable by plants, and this process can occur in three ways. Learn about nitrogen fixation's occurrence in lightning, industrial factories and bacteria with help from a science teacher and field biologist in this free video on biology.

Gregor Mendel is often referred to as the father of modern genetics, and he is most famous for his studies of pea plants and their series of inheritance. Discover how Mendel used meticulous methods to perform his experiments with help from a science teacher and field biologist in this free video on modern genetics.

A substance is a limiting nutrient when it runs out first, meaning that it is needed in a chemical reaction, but isn't present in sufficient quantities to allow the reaction to occur. Test for limiting nutrients in a controlled manner with help from a science teacher and field biologist in this free video on chemistry.

The principles behind salt dissolving in water are the types of bonds that exist in the molecules and the interactions that these bonds have. Find out how water pulls apart salt molecules and ionic bonds with help from a science teacher and field biologist in this free video on chemistry.

Heat is a catalyst because it increases temperature and makes molecules move faster, a reaction that automatically increases the amount of energy involved. Discover why heat makes molecules run into each other more frequently with help from a science teacher and field biologist in this free video on chemistry.

Hydrogen has three isotopes, which are H1, deuterium and tritium. Learn about the makeup of the isotopes of hydrogen with help from a science teacher and field biologist in this free video on chemistry.

Physical traits that are inherited by individuals come from their parents, but these individuals have their own genome, which is made up of DNA, the genetic blueprint. Discover how DNA provides the instructions for how everything should be put together with help from a science teacher and field biologist in this free video on biology.

Enzymes are biological catalysts whose main purpose is to speed up the rate of a chemical reaction by decreasing the activation energy that is needed. Find out why enzymes are important for the majority of chemical reactions with help from a science teacher and field biologist in this free video on biology.

The function of cellulose is to provide the strength and structure of plant leaves, but it can also be used to make paper and explosives. Discover how cellulose gives strength to cotton with help from a science teacher and field biologist in this free video on biology.

Cellulose is a long chain of glucose molecules, and it is found in the cell walls of plants, serving as their system of rigidity and support. Learn about the formation of microfibral clusters with help from a science teacher and field biologist in this free video on biology.

Climate refers to the average weather for a specific area over a long period of time, and this should be viewed in contrast with current, immediate phenomena. Discover how climates can impact what kind of plants can grow in an area with help from a science teacher and field biologist in this free video on biology.

Nitrogen is a basic building block that is used in the formation of different complex organic molecules, and it is used in amino acids. Find out about nitrogen's importance in RNA and DNA with help from a science teacher and field biologist in this free video on organic chemistry.

Carbon is important to life because it is the fourth most abundant element in the universe, and the second most abundant element in the human body. Learn about how carbon is used as the basis for organic chemistry with help from a science teacher and field biologist in this free video on organic chemistry.

The energy that forms as a result of cellular respiration is used in all kinds of chemical reactions that take place in the body, and these are called metabolic reactions. Find out how ATP is used for chemical reactions with help from a science teacher and field biologist in this free video on biology.

The genetic code refers to the order of nucleotides that make up a person's DNA or RNA, and this provides the blueprint for life, as well as a set of instructions for how to create proteins. Discover how genetic encoding results in the creation of physical traits with help from a science teacher and field biologist in this free video on biology.

The fuel used in cellular respiration is ATP, and two ATP are used in the first step of respiration, which is glycolysis. Learn about the protein gradient as a fuel for oxidative phosphorylation with help from a science teacher and field biologist in this free video on biology.

Cellular respiration takes place in the cell cytoplasm, inside the mitochondria and across the mitochondria crystae. Learn more about the different areas in which cellular respiration takes place with help from a science teacher and field biologist in this free video on biology.

A sampling interval is the amount of time between data points and how often a person is recording data. Find out how a sampling interval can be referred to as a frequency about observation with help from a science teacher and field biologist in this free video on sampling intervals.

The lower left quadrant of the human body holds several major organs, including the small intestine, the colon, the left ureter and several parts of the female reproductive system. Learn about different parts of the colon that exist in the lower left quadrant with help from a science teacher and field biologist in this free video on biology.