Cellular Respiration and Photosynthesis ( Read ) | Biology | CK Foundation
Photosynthesis and cellular respiration are connected through an important relationship. This relationship enables life to survive as we know it. On the contrary, photosynthesis occurs in green plants, which contain Difference Between Cellular Respiration and Photosynthesis . are in mutually beneficial relationship, where from one process (photosynthesis) oxygen. What are some differences and similarities between photosynthesis and respiration? Compare and contrast the major pathways of photosynthesis and respiration. Cellular respiration and photosynthesis are the two major processes by which animal and plant cells supply themselves with.
Mesophyll is the layer of the plant that contains chloroplasts and is the only place photosynthesis occurs. The energy taken is stored as ATP adenosine triphosphate. It is required for energy storage and is made of the nucleotide adenine with ribose sugar.
Photosynthesis vs. Cellular respiration
Sciencing Video Vault Respiration The respiratory system allows living creatures that are not plants to obtain oxygen from the air for use in the blood and cells. Oxygen is a much needed nutrient and living organisms can roughly only survive for minutes without it. Even if oxygen flow is reestablished, the damage can be irreparable. Alveoli are responsible for exchanging oxygen rich air with carbon dioxide rich blood cells.
Diffusion occurs due to the pressure difference between alveoli, which is high, and the pressure of blood, which is lower. Blood cells take the oxygen and alveoli take the carbon dioxide, which is then exhaled. Cellular Respiration Cellular respiration first breaks down glucose into pyruvic acid, and then the pyruvic acid is oxidized into carbon dioxide and water.
This process usually occurs in the cytosol and mitochondria of eukaryotic cells. Mitochondria are organelles responsible for the conversion of potential energy into ATP.
Difference The main difference between photosynthesis and respiration is where it occurs, one being in plants and some bacteria and the other being in most every other living thing.
The other difference is that plants require sunlight for the process to occur, whereas respiration does not. Oxidative phosphorylation In the cellular respiration oxidative phosphorylation occurs. It is a catabolic process. It is an anabolic process. Oxygen and carbohydrates are absorbed in the process. Oxygen and carbohydrates released. Carbon dioxide and water are released.
Carbon dioxide and water are absorbed. Definition of Cellular Respiration In this process, the carbohydrate in the form of glucose is broken down and along with oxygen, is converted into carbon dioxide and water and thereby releasing energy as ATP or adenosine triphosphate. This energy is used for various metabolic activities and other cellular work. Cellular respiration occurs in mitochondria and cytoplasm of the cell. Unlike photosynthesis, it works day and night.
Difference Between Cellular Respiration and Photosynthesis
Though it is not as simple reaction as we say, it is a long process which undergoes four major steps. Glycolysis splitting or breaking of the sugar — It occurs in the cytoplasm of the cell, where one molecule of glucose C6H12O6 is broken into two molecules pyruvic acid. So here two ATP molecules are generated from the one molecule of glucose.
Transition Reaction — Pyruvic acid is sent to the mitochondria, where it get converted into Acetyl CoA and get further broken down. Even the carbon dioxide and water are released as a waste product from this reaction. In this reaction, thirty-two 32 ATP are generated for every glucose. So overall reaction is written as: However, above we discussed was about only aerobic cellular respiration, which occurs in the presence of oxygen and thus resulting in the production of thirty-eight 38 molecules of ATP from one glucose molecule.
But what about in the case when there is the shortage of oxygen like when we run or while performing any exercise. This is called anaerobic condition, where they produce only two 2 ATP molecules from one molecule of glucose from the glycolysis pathway only.
It does not undergo for further break down of the molecules, as the body demands immediate energy at that moment. Secondly, other reactions occur in the presence of oxygen, and this is the reason they are skipped. The anaerobic reaction is also called fermentation. Therefore, it is called as the catabolic process as energy is released in any form by breaking the large molecules into the smaller ones.
But chemically it is an oxidation-reduction process oxidation is the removal of electrons and reduction is gaining of electrons by a molecule.
This process occurs in light sunlight only and so-called as light-energized oxidation process. The photosynthesis occurs in leaves of the green plants, especially in the chloroplast which is the tiny structure present in cells of the leaves.
The chloroplast contains chlorophyll a green chemical is responsible for the green colour of the leaves. Further oxygen is released into the atmosphere from the leaves, and the carbon dioxide and hydrogen are used to generate food or glucose for plants.
It can be elaborated by the following equation: The removed hydrogen ions and electrons moved to the carbon dioxide CO2 and are reduced as the organic product.
So overall reaction where carbohydrates C6H12O6 are formed during photosynthesis is defined in the equation. Though the above equation is a summary of the whole process, there is the involvement of many enzymes and other reactions too. The process is divided into two stages: Light reaction and Dark reaction. Light reaction — The light energy is absorbed and is used for the transfers of electrons and thus producing adenosine triphosphate ATP and reduction of nicotine adenine dinucleotide phosphate NADPH.
Key Differences Between Cellular Respiration and Photosynthesis Upcoming points will present the substantial differences between cellular respiration and photosynthesis: