The Krebs Cycle

Living things must take in nutrients and give off waste in order to survive since all living tissues are constantly using energy. In plants, animals, and fungi the energy comes from cellular respiration which is the process that occurs inside of cells. Oxygen is used to convert the chemical energy found in a molecule of sugar into a form of energy used by organisms known as ATP and the waste known as carbon dioxide and water. Sugars are made up of carbon, hydrogen, and oxygen and they come in different kinds of sugars. Simple sugars such as glucose and fructose are called monosaccharides, while the complex sugars include disaccharides (ex. lactose, maltose, and sucrose) and polysaccharides (ex. starch, glycogen, and cellulose). The known process of cellular respiration is used to determine which food source either maltose or sucrose is yeast most effective at acquiring energy. This is calculated by the rate of formation of carbon dioxide.

* Energy is required because it allows most functions and reactions to happen in the organism

Energy keeps all living organisms alive, as they need a continual supply of energy to function in order to survive. Some of these processes are continuous such as, metabolism, which is the chemical reactions which occur in the body, these occur by using or releasing energy from chemical substances. Another continuous process which use energy is the transporting of molecules in order for them to break down, and to build new ones. The breakdown of large molecules into their simpler forms to release energy is known as catabolism, for example, when glucose is used in a cell to release energy. And the opposite reaction, is called anabolism. This is when energy is used to build complex structures from simple cells, for example, tissue growth and

The body and cells need a constant supply of energy for a variety of reasons. Energy is needed to carry out mechanical work which involves the change in location or orientation of a body part or the cell itself. A major example is the energy required for the contraction of muscles. Molecular transport also requires energy. The movement of molecules from an area of low concentration to an area of higher concentration requires energy since this is opposite to the normal movement of molecules. This process is also called active transport. Examples include the movement of nutrient raw materials into a cell and the movement of waste materials out of the cell. Electrical work is also included under molecular transport

Energy metabolism is where the nutrients oxygen and glucose are took in and delivered the organs. Energy is needed in order for our body to be able to function. Energy helps break down molecules and to build new molecules.

To maintain life, organisms must be able to convert energy from one form to another. For example, in the process of photosynthesis, algae, plants, and photosynthetic prokaryotes use the energy from sunlight to convert carbon dioxide and water to glucose and oxygen (a waste product).

Introduction: Cellular respiration and fermentation are used in cells to generate ATP. All cells in a living organism require energy or ATP to perform cellular tasks (Urry, Lisa A., et al. , pg. 162). Since energy can not be created (The first law of thermodynamics) just transformed, the cell must get its energy from an outside source (Urry, Lisa A., et al. , pg.162). “Totality of an organism’s chemical reactions is called metabolism” (Urry, Lisa A., et al., pg. 142). Cells get this energy through metabolic pathways, or metabolism. As it says in Campbell biology, “Metabolic pathways that release stored energy by breaking down complex molecules are called catabolic pathways” (Urry, Lisa A., et al. pg.

Energy is stored within the bonds in the body that hold atoms and molecules all in one place, the cells can break down the glucose molecules, this is done through a chemical reaction. This can take place within the cytoplasm and it is then finished within the mitochondria, this is known as cellular respiration.

Metabolism uses energy to power all the life processes, such as repair, movement, and growth.

E. Metabolism – Organisms rely on complex chemical reactions to provide the energy for responsiveness, growth,

All living organisms need the energy to perform the basic life functions. Cells use a process called cellular respiration to obtain the energy needed. In cellular respiration, cells convert energy molecules like starch or glucose into a cellular energy called Adenosine triphosphate(ATP). There are two types of cellular respiration which include: Aerobic and Anaerobic respiration. In aerobic respiration, cells will break down glucose to release a maximum amount of ATP this takes place in the presence of oxygen. Aerobic also produces carbon dioxide and water as waste products and it takes place in the mitochondria. on the other hand, anaerobic respiration, a metabolic process, also produces energy and uses glucose, but it releases less energy and does not require the

These four biomolecules are metabolized by the animal body. Each biomolecule is broken down in a different process. The end result of each process is the creation of usable energy for the body. This energy is used to work and generate other chemical reactions that help the body move and think. Carbohydrates, lipids, proteins and nucleic acids each provide energy to different places within the body that, in turn, stimulate other chemical reactions to occur, creating a chain reaction of chemical reactions throughout the body. The metabolization of these major

All three of your energy systems ultimately run on ATP: It’s the fuel source for all your physical functions, from eating to breathing to running hill sprints. Your glycolytic and oxidative systems (which we’ll cover shortly) make most of this ATP to order, cobbling it together from the food you eat and the air you breathe as need arises.

     To metabolic pathways involved in photosynthesis are light reaction and dark reaction. The first stage of the photosynthetic system is the light-dependent reaction, which converts solar energy into chemical energy. Light absorbed by chlorophyll or other photosynthetic pigments is used to drive a transfer of electrons and hydrogen from water to and acceptor called NADP , reducing it to the form of NADPH by adding a pair of electrons and a single proton. The water or some other donor molecule is split in the process. The light reaction also generates ADP, a process called photophosphorylation. ATP is a versatile source of chemical energy used in most biological processes. The light reaction produces no carbohydrates such as sugars.

Energy metabolism is the process by which living cells obtain energy and use them to live, grow and reproduce. Energy is released when the chemical bonds of the nutrient molecules break and form high energy compounds such as ATP. ATP is the main chemical energy carrier in all the cells. ATP synthesis can occur by two mechanisms: