Essay about Compare Photosynthesis and Cellular Respiration

In cellular respiration, the oxidation of glucose is carried out in a controlled series of reactions. At each step or reaction in the sequence, a small amount of the total energy is released. Some of this energy is lost as heat. The rest is converted to other forms that can be used by the cell to drive or fuel coupled endergonic reactions or to make ATP.

Organisms are complex and use energy to function, grow, and reproduce. Organisms get this energy from photosynthesis and cellular respiration. Photosynthesis is the process by which plants harness sunlight to make glucose from carbon dioxide and water1. Photosynthesis provides glucose for cellular respiration. Glucose is the reactant for cellular respiration. Cellular respiration has complex stages, where the glucose molecule is slowly broken down. The formula for cellular respiration is C6H12O6 + 6O2 ⇢ 6CO2 + 6H2O + energy.

The last step of cellular respiration is the Electron transport chain (ETC). The ETC takes place in the inner mitochondrial membrane. Electrons from Hydrogen are carried by NADH and passed down an electron transport chain to result in the production of ATP. Results are the production of ~32 ATPs for every glucose. Oxygen, which is the final electron receptor, finishes the process by creating a water molecule and combining the remaining hydrogen molecules. Oxygen is the final electron receptor. Without it, the process cannot be complete (Cellular Respiration, 2004). The waste products of cellular respiration are CO2 and H2O that are the same incrediants used in photosynthesis. Plants store chemical energy by photosynthese and then harvest this energy via cellular respiration.

Photosynthesis is the process of producing glucose, as for Cellular respiration is the process of breaking that glucose down in order to produce and release the energy stored in photosynthesis. Both of these processes create ATP (energy), photosynthesis and cellular respiration both function as a circle – the first using CO2 and releasing O2, while the other uses O2 and releases CO2. Another reason that both processes are complementary is because they entail the same components of H2O, energy, CO2, O2 and glucose, but the reactions are opposite to each other as explained above. (Mader, 2009)

Cellular respiration is composed of three steps, glycolysis, the Krebs cycle and the electron transport chain. Glycolysis is the first step of cellular respiration, which occurs in the cytoplasm and produces energy in the form of ATP. Glycolysis is the “process in which one glucose molecule is broken down to form two molecules of pyruvic acid” (cliffnotes, cellular

Both, Photosynthesis and Cell Respiration can occur in prokaryotic and eukaryotic cells, they are reactions essential for proving energy to all living things. They both used the same molecules and compounds during their processes. As process produces glucose (photosynthesis), the other breaks down the glucose to create ATP or energy that is used in cells. Photosynthesis is the process in which a plant undergoes to make its own food, this process occurs in the chloroplast of the plant cell.

Unlike photosynthesis, cellular respiration is an exergonic reaction where energy is released, rather than absorbed. This released energy is called ATP, the energy currency of the cell.

Cellular respiration is a very important process that occurs in all living organisms. In this process, chemical energy is obtained by the organisms’ food source to be turned into ATP or adenosine triphosphate, a form of energy that is easily utilized by the organisms’ bodies to carry out certain bodily functions (Largen, 2008, p.41). The chemical formula for cellular respiration is C6H12O6+6O2+6H2O→6CO2+12H2O+energy. This simply means that, with the use of glucose, six molecules of oxygen, and six molecules of water, an output of six carbon dioxide molecules, twelve molecules of water, and energy (ATP) is produced (Khan, 2010). Glucose is especially important in this process, given that it acts as a fuel in cellular respiration. (Cellular Respiration: Introduction, n.d.). In the biosphere, there is also a vast

Cellular respiration and photosynthesis have several differences. In photosynthesis, plants and some bacteria use light energy, carbon dioxide, and water to produce glucose and oxygen. On the other hand, cellular respiration is the process in which glucose is broken down and converted into energy, specifically ATP. Eukaryotes like plants and animals carry out cellular respiration, however, only plants and some bacteria carry out photosynthesis. Aerobic cellular respiration takes place in the

Cells are the basic units of life and their processes are vital to the functioning of all organism. The reactions of photosynthesis and cellular respiration are complimentary and are also the most important pathways on the Earth. Photosynthesis is a process that converts carbon dioxide into organic compounds in presence of sunlight. Cellular respiration is the set of metabolic reactions that take in cells of living organisms that convert nutrients like sugar into energy , which is known as ATP (adenosine triphosphate), and waste products. The two processes are closely related and likewise, they share many similarities and differences

The formula for cellular respiration is C6H12O6 + 6O2 ---> 6CO2 + 6H2O + Energy. This Equation is stating that Glucose + Oxygen changes into Carbon Dioxide + Water + ATP + Heat + Energy. The inputs of cellular respiration are the glucose (C6H12O6) and oxygen (6O2) part of the equation. The outputs of this process are Carbon Dioxide (6CO2), water (6H2O), ATP, and energy. There are three main steps to the cellular respiration process. First there is Glycolysis, which is the breakdown of glucose by enzymes, releasing energy and pyruvic acid. The next step is the Krebs cycle. The Krebs cycle is the sequence of reactions by which many living cells generate energy throughout an aerobic respirational process. It takes place in the mitochondria, taking

The carbon cycle is made up of the two different processes of photosynthesis and cellular respiration. Photosynthesis, which is only done by plants, is the first process in the cycle. In this process, carbon dioxide and water are taken as the reactants and made into the products of glucose (sugar) and oxygen. The process is represented by the equation of 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, which translates to carbon dioxide + water → glucose + Oxygen. The second process in the cycle is cellular respiration in which the products of photosynthesis

Glycolysis is followed by the Krebs cycle, however, this stage does require oxygen and takes place in the mitochondria. During the Krebs cycle, pyuvic acid is broken down into carbon dioxide in a series of energy-extracting reactions. This begins when pyruvic acid produced by glycolysis enters the mitochondria. As the cycle continues, citric acid is broken down into a 4-carbon molecule and more carbon dioxide is released. Then, high-energy electrons are passed to electron carriers and taken to the electron transport chain. All this produces 2 ATP, 6 NADH, 2 FADH, and 4 CO2 molecules.

     Photosynthesis has a two-stage performance before plants produce the two products they are known to produce. These stages are Photosystem I and II. Photosystem II is dependant on light reactions for energy which causes the electrons to be react and be transferred to Photosystem II. The electrons are transported through the Photosystem II electron transport system, however some energy is used to drive ATP synthesis. Meanwhile, light is being absorbed by the Photosystem I, which causes the electrons to react. This process sends the electrons to the Photosystem I transport system where some energy is released as electrons travel through the electron transport system and is captured as NADPH. When this process is completed oxygen is released from the plant and glucose has been

     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.