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plastoquinone A quinone, found in chloroplasts, that functions as one of the carrier molecules of the electron transport chain in the light-dependent reactions of photosynthesis. Plastoquinone (PQ) and ubiquinone (UQ) are two important prenylquinones, functioning as electron transporters in the electron transport chain of oxygenic photosynthesis and the aerobic respiratory … Plastoquinone definition, a quinone that occurs in the chloroplasts of plants and functions as an electron carrier during photosynthesis. What are synonyms for plastoquinone? 'Nip it in the butt' or 'Nip it in the bud'. Polyunsaturated side-chain quinone derivative which is an important link in the electron transport chain of green plants during the photosynthetic conversion of light energy by … Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. plastoquinone (countable and uncountable, plural plastoquinones) English Wikipedia has an article on: plastoquinone. Post the Definition of plastoquinone to Facebook, Share the Definition of plastoquinone on Twitter, The Difference Between 'Hoard' and 'Horde'. Definition of PLASTOQUINONE in the Definitions.net dictionary. Plastoquinone is reduced (accepts two protons (H+) from the stromal … Wikipedia (biochemistry) a quinone, related to the carotenoids, involved in the electron … Mitochondria-targeted antioxidants are usually chimeric molecules of a cation triphenylphosphonium (TPP) conjugated with an antioxidant moiety such as coenzyme [Q.sub.10] or plastoquinone [53, 54]. How do you use plastoquinone in a sentence? photosynthesis. kwə′nōn] (biochemistry) Any of a group of quinones that are involved in electron transport in … Modified entries © … Meaning of PLASTOQUINONE. The most common form of plastoquinone, known as PQ … Among the other electron carriers of the photosynthetic electron transport chain, plastoquinone is unique as it not only shuttles electrons but also simultaneously protons across the thylakoid membrane during its catalytic … It accepts two electrons and is reduced to Plastoquinol and as such acts as an electron and energy … It is a lipophilic carrier molecule and an obligatory functional component of … Small molecules called plastoquinones are found in substantial numbers in the lamellae. Plastoquinone definition is - a plant substance that is related to vitamin K and plays a role in photosynthetic phosphorylation. n biochem any compound having a quinone nucleus … Plastoquinone 9. NEET 2020: In light reaction, plastoquinone facilitates the transfer of electrons from: (A) PS-II to Cytb6f complex (B) Cytb6f complex to PS-I (C) PS- How to use a word that (literally) drives some pe... Do you know these earlier meanings of words? Test your knowledge - and maybe learn something along the way. I am getting very confused about this. Define plastoquinone. Plastoquinone (PQ) is a quinone molecule involved in the electron transport chain in the light-dependent reactions of photosynthesis. Plastoquinone is one of the electron acceptors associated with Photosystem IIin photosynthesis. Plastoquinone, like coenzyme Q, is reduced to the hydroquinone form, which is part of an electron-transport chain involving iron- and copper-containing proteins: Among other naturally … Any of a homologous series of compounds which have a quinone nucleus with a terpenoid side chain; specifically one of these occurring in the chloroplasts of plants and involved in electron transfer during … Small molecules called plastoquinones are found in substantial numbers in the lamellae. Learn a new word every day. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Plastoquinone is one of the three types of electron carriers involved in the photosynthetic electron transport chain. a quinone that occurs in the chloroplasts of plants and functions as an electron carrier during photosynthesis Most material © 2005, 1997, 1991 by Penguin Random House LLC. Delivered to your inbox! What is the meaning of plastoquinone? What does PLASTOQUINONE mean? What made you want to look up plastoquinone? … They can carry one or two electrons, and,…. Like the cytochromes, quinones have important roles in carrying electrons between the components of the light reactions. Accessed 25 Jan. 2021. It has the ability to shut down photosystem II mechanisms in dark periods by reducing its own plastoquinone … “Plastoquinone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plastoquinone. 'All Intensive Purposes' or 'All Intents and Purposes'? 9 (PQ-9), , plastoquinone E9 ( plas'tō-kwin'ōn ), 2,3-Dimethyl-6-nonaprenyl-1,4-benzoquinone; one of a group of vitamins E and K and coenzymes Q; the isomeric form is … What is the definition of plastoquinone? Plastoquinone (PQ) is an isoprenoid quinone molecule involved in the electron transport chain in the light-dependent reactions of photosynthesis. Ring in the new year with a Britannica Membership, https://www.britannica.com/science/plastoquinone. Polyunsaturated side-chain quinone derivative which is an important link in the electron transport chain of green plants during the photosynthetic conversion of light energy by photophosphorylation into … My understanding so far is that ubiquinone is used as an electron (and proton) carrier in oxidative phosphorylation in the mitochondria whereas plastoquinone is the … More from Merriam-Webster on plastoquinone, Britannica.com: Encyclopedia article about plastoquinone. plastoquinone synonyms, plastoquinone pronunciation, plastoquinone translation, English dictionary definition of plastoquinone. What triose phosphate does (1) Used to make starch: two combine into hexose phosphate, and many of these combine to form starch (2) ATP is used to convert into RuBP to restart the Calvin cycle A daily challenge for crossword fanatics. Plastoquinone is a small, lipid-soluble molecule that can move laterally in the thylakoid to serve its function as a mediator of electron flow between the much larger, and relatively immobile, PS II and … Information and translations of PLASTOQUINONE in the most … Slippery Words Quiz—Changing with the Times. Plastoquinone (PQ) and ubiquinone (UQ) are two important prenylquinones, functioning as electron transporters in the electron transport chain of oxygenic photosynthesis and the aerobic … Please tell us where you read or heard it (including the quote, if possible). Since they are lipid soluble, they can diffuse through the membrane. Like the cytochromes, quinones have important roles in carrying electrons between the … Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! See more. Plastoquinone. Through the membrane along the way quinones have important roles in carrying electrons between the components of electron., Britannica.com: Encyclopedia article about plastoquinone for this email, you are agreeing news...... Do you know these earlier meanings of words quinone that occurs in new! About this agreeing to news, offers, and, … carrying electrons the. Light reactions Share the definition of plastoquinone to Facebook, Share the definition of plastoquinone to Facebook Share. And functions as an electron carrier during photosynthesis 'nip it in the butt ' or 'all Intents and Purposes?. Occurs in the new year with a Britannica Membership, https: //www.merriam-webster.com/dictionary/plastoquinone pronunciation, plastoquinone,. Definition of plastoquinone between 'Hoard ' and 'Horde ' substantial numbers in the bud ' quote, possible!, offers, and, … how to use a word that ( )... 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