Only plants can photosynthesize, but both plants and animals depend on respiration to release the chemical potential energy originally captured through photosynthesis.
Respiration occurs in your cells and is fueled by the oxygen you inhale. The carbon dioxide gas you exhale is the result of a completed cycle of cellular respiration.
The basic minimum knowledge for GCSE biology is the word equation given below. Even if you don’t understand it you can memorise it like a parrot.
The figure illustrates how closely photosynthesis and respiration are linked. As you can see, thanks to these two life-sustaining processes, plants and animals depend on each other to survive.
Here is a balanced chemical equation for the process of aerobic respiration. You only need to memorise this for the Higher Tier GCSE paper, however I am sure that you really want a grade “A” so why not memorise it.
While photosynthesis is performed by most plants which can prepare their own food, most animals fulfill their energy requirements through cellular respiration.
Photosynthesis is the process by which plant cells convert light energy from the sun into chemical energy, so as to create energy-rich carbohydrate molecules like glucose.
Cellular respiration is the process of breaking down food molecules to obtain energy and store it in the form of adenosine triphosphate (ATP) molecules.
Plant cells, after creating sugar molecules through photosynthesis, undergo cellular respiration to create ATP molecules.
Environmental scientists recognize that the fundamental source of energy for most life on earth is the sun. Through photosynthesis, plants capture the light and convert it into chemical potential energy. Plants then store the potential energy in the form of (biological matter that fuels nearly every animal on earth).
The chemical equation for respiration is:C6H12O6 + 6O2 6CO2 + 6H2OGlucose + Oxygen Carbon Dioxide + WaterThe key points: Glucose stores the sun's energy in chemical form.
Assignment 1.4c - Photosynthesis & Cellular Respiration Scoring criteriaHonors biology : Only complete section below labeled honors biologyStudy this website about ATP.
The reactants of cellular
respiration are the products
of photosynthesis and the
reactants of photosynthesis
are the products of cellular
where (CH2O)n is a stoichiometric approximation for the composition of biomass material. This source of O2 is balanced by loss of O2 from the oxidation of biomass, including respiration by living biomass and microbial decay of dead biomass:
Simple comparison of these inventories tells us that cycling with the biosphere cannot control the abundance of O2 in the atmosphere, because the inventory of O2 is considerably larger than that of either CO2 or organic carbon. If photosynthesis were for some reason to stop, oxidation of the entire organic carbon reservoir would consume less than 1% of O2 presently in the atmosphere and there would be no further O2 loss (since there would be no organic carbon left to be oxidized). Conversely, if respiration and decay were to stop, conversion of all atmospheric CO2 to O2 by photosynthesis would increase O2 levels by only 0.2%.
rust is an orange-brown solid of hydrated iron(III) oxide formed from the reaction with oxygen and water (the equation is not meant to be balanced and the amount of water x is variable, from dry to soggy!).
An additional pathway for CO2 uptake involves photosynthesis by phytoplankton. The organic carbon produced by phytoplankton moves up the food chain and about 90% is converted eventually to CO2(aq) by respiration and decay within the oceanic mixed layer. The 10% fraction that precipitates (fecal pellets, dead organisms) represents a biological pump transferring carbon to the deep ocean. The biological productivity of the surface ocean is limited in part by upwelling of nutrients such as nitrogen from the deep (), so that the efficiency of the biological pump is again highly dependent on the vertical circulation of the ocean water. It is estimated that the biological pump transfers 7 Pg C yr-1 to the deep ocean, as compared to 40 Pg C yr-1 for CO2(aq) transported by deep water formation.