In green plants, which photosystem absorbs photons to excite electrons in the reaction center?<\/p>\n\n\n\n
The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n Correct Answer:<\/strong> Photosystem II (PSII)<\/strong><\/p>\n\n\n\n In green plants, Photosystem II (PSII)<\/strong> is the first photosystem in the sequence of light-dependent reactions of photosynthesis. It plays a critical role in converting light energy into chemical energy. PSII is located in the thylakoid membranes of chloroplasts and is responsible for the initial absorption of light (photons)<\/strong> to excite electrons in its reaction center<\/strong>, which contains a special chlorophyll a<\/strong> molecule known as P680<\/strong> (named for its peak light absorption at 680 nm).<\/p>\n\n\n\n When light strikes PSII, photons are absorbed by antenna pigments, and the energy is transferred to P680. This excites an electron in the P680 molecule to a higher energy level. The excited electron is then transferred to the primary electron acceptor<\/strong>, initiating the electron transport chain<\/strong> (ETC). The lost electron in P680 is replaced by electrons obtained through the photolysis (splitting) of water molecules<\/strong>, which generates oxygen (O\u2082) as a by-product.<\/p>\n\n\n\n The electron then travels down the electron transport chain to Photosystem I (PSI)<\/strong>, during which energy is used to pump protons (H\u207a) into the thylakoid lumen, contributing to a proton gradient that drives ATP synthesis<\/strong> via ATP synthase<\/strong>.<\/p>\n\n\n\n Photosystem I (PSI), with its chlorophyll P700, also absorbs light but works after PSII<\/strong> in the chain and is mainly responsible for the production of NADPH<\/strong>.<\/p>\n\n\n\n Thus, while both photosystems absorb photons, Photosystem II<\/strong> is the first<\/strong> to absorb light and excite electrons, playing the crucial initiating role in the light-dependent reactions of photosynthesis.<\/p>\n\n\n\n In green plants, which photosystem absorbs photons to excite electrons in the reaction center? The correct answer and explanation is: Correct Answer: Photosystem II (PSII) Explanation: In green plants, Photosystem II (PSII) is the first photosystem in the sequence of light-dependent reactions of photosynthesis. It plays a critical role in converting light energy into chemical […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23744","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/23744","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=23744"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/23744\/revisions"}],"predecessor-version":[{"id":23745,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/23744\/revisions\/23745"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=23744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=23744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=23744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\n\n\nExplanation:<\/h3>\n\n\n\n
\n\n\n\nSummary:<\/h3>\n\n\n\n
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