Muenzaniso weMibvunzo yeKukurukurirana kweMetabolism
Metabolism inzira yemakemikari anoitika mukati memasero ezvisikwa zvipenyu kuti zvirambe zvichirarama. Maitiro aya anosanganisira mapoka maviri makuru: anabolism necatabolism. Anabolism inzira yekuvaka mamorekuru akaomarara kubva kune ari nyore, anowanzo da simba. Catabolism inzira yekuputsa mamorekuru akaomarara kuita ari nyore, nokudaro achiburitsa simba.
Muzvidzidzo zvebhayoloji, metabolism inyaya inokosha uye inowanzo kunetsa vadzidzi. Kuti tikubatsirei kunzwisisa nyaya iyi zviri nani, tichakupai mienzaniso yakawanda yezvinetso netsananguro dzazvo.
Muenzaniso Mubvunzo 1: Nzira yeGlycolysis
Mubvunzo: Tsanangura maitiro e glycolysis uye nyora mhedzisiro yenzira iyi.
Kukurukurirana:
Glycolysis inzira yekuchinja kwemasero inoitika mu cytoplasm yesero, uko molekyuru imwe yeglucose (C6H12O6) inoputswa kuita mamorekyuru maviri e pyruvic acid (C3H4O3). Maitiro aya haadi oxygen (anaerobic) uye anoitika mumatanho gumi anokonzereswa nema enzymes chaiwo.
1. Matanho Ekugadzirira:
– Glucose inoshandurwa kuita Glucose-6-phosphate ne enzyme hexokinase.
– Glucose-6-phosphate inozoshandurwa kuita fructose-6-phosphate ne enzyme phosphoglucose isomerase.
– Fructose-6-phosphate inosanganiswa ne phosphorylated kuita fructose-1,6-bisphosphate kuburikidza ne phosphofructokinase.
2. Matanho ekupatsanura:
– Fructose-1,6-bisphosphate inokamurwa kuita mamorekuru maviri ane kabhoni nhatu: dihydroxyacetone phosphate uye glyceraldehyde-3-phosphate.
3. Matanho Ekukurudzira uye Kuumbwa kweATP:
– Glyceraldehyde-3-phosphate inoshandurwa kuita 1,3-bisphosphoglycerate ne dehydrogenase.
– Phosphate inotamiswa kubva ku1,3-bisphosphoglycerate kuenda kuADP kuti igadzire ATP uye 3-phosphoglycerate.
– 3-phosphoglycerate inozoshandurwa kuita phosphoenolpyruvate.
– Pakupedzisira, phosphate inobva ku phosphoenolpyruvate inoendeswa kuADP kuti igadzire ATP uye pyruvate.
Zvibereko zvekupedzisira zve glycolysis mamorekuru maviri e pyruvic acid, mamorekuru maviri e ATP (ma ATP mana anogadzirwa asi maviri anozoshandiswazve), uye maviri e NADH.
Muenzaniso Mubvunzo 2: Krebs Cycle
Mubvunzo: Tsanangura basa reKrebs cycle mukushandiswa kwesimba remasero uye nyora zvinhu zvikuru zvinobuda mudenderedzwa rimwe chete.
Kukurukurirana:
Krebs cycle, inozivikanwawo se citric acid cycle kana TCA cycle, inzira yekuchinja kwesimba inoitika mu mitochondria. Maitiro aya anoda okisijeni (aerobic) uye anoita basa guru mukugadzira mamorekuru ane simba rakawanda akadai seNADH neFADH2, ayo anoshandiswa mu electron transport chain kugadzira ATP.
Pakutanga kweKrebs cycle, acetyl-CoA molecule inosanganiswa ne oxaloacetic acid (4C) kuti igadzire citric acid (6C). Citric acid inobva yaita ma reactions akawanda anozogadzira oxaloacetic acid, ukuwo ichiburitsa mamorekuru maviri eCO2, uye ichigadzira NADH, FADH2, uye ATP (kana GTP).
Mhedzisiro mikuru yekutendeuka kamwe chete kweKrebs cycle (kutanga neacetyl-CoA imwe chete) ndeiyi:
- 3 mamorekuru eNADH
– Morekuru rimwe chete reFADH2
– 1 molecule yeATP (kana GTP)
– mamorekuru maviri eCO2
NADH neFADH2 zvinozoshandurwa kuita ATP kuburikidza neketani yekufambisa maerekitironi.
Muenzaniso Mubvunzo 3: Cheni yeKutakura Maerekitironi
Mubvunzo: Tsanangura kuti cheni yekufambisa maerekitironi inoita sei basa mukugadzirwa kweATP uye taura nzvimbo yemaitiro aya musero.
Kukurukurirana:
Cheni yekufambisa maerekitironi (ETC) ndiyo chikamu chekupedzisira chekufema kwemasero uye chinoitika mukati memukati memitochondria. Basa rayo guru nderekugadzira ATP kuburikidza ne oxidative phosphorylation.
NADH neFADH2, zvinogadzirwa ne glycolysis uye Krebs cycle, zvinopa maerekitironi kune iyi chain. Maerekitironi anoyerera kuburikidza nezvikamu zveprotein zvakaoma zvakaputirwa mu mitochondrial membrane. Simba rinoburitswa kana maerekitironi achiyerera rinoshandiswa kupomba mapurotoni (H+) kubva mu mitochondrial matrix kuenda kunzvimbo yepakati pemembrane, zvichigadzira proton gradient.
Kuchinja kweproton uku kunogadzira simba rinozivikanwa seproton-motive force. Mapurotoni anodzokera ku matrix kuburikidza neATP synthase, enzyme inoshandisa kuyerera kweproton uku kugadzira ATP kubva kuADP uye inorganic phosphate.
Kazhinji, maitiro eETC anogona kugadzira anenge 34 ATP pamorekuru yeglucose yakasanganiswa.
Mibvunzo Yekuwedzera uye Kukurukurirana
Zvakakoshawo kuedza mimwe mibvunzo inoedza kunzwisisa kwako ma enzymes anobatanidzwa, musiyano uripo pakati pekufema kwemasero nekuvirisa, uye mhedzisiro yemamiriro ekunze (akadai sekuwanikwa kweokisijeni) pametabolism.
Mibvunzo Yokuwedzera:
1. Sei NAD+ ichikosha mu glycolysis?
2. Enzanisa kufema kwemuviri nekubikisa maererano nekushanda zvakanaka kwekugadzirwa kweATP.
3. Tsanangura kuti metabolism yemafuta acid yakabatana sei neKrebs cycle.
Kudzidza nezvemetabolism kunoda kunzwisisa kwakadzama kwebiochemistry uye physiology yemasero. Zano rakanakisisa nderekuti urambe uchidzidzira nematambudziko, hurukuro dzemapoka ekudzidza, uye kuyedza murabhoritari kusimbisa pfungwa idzi. Ndinovimba kuti chinyorwa chino chichakubatsira kudzikamisa kunzwisisa kwako nezvemetabolism uye kugadzirira mibvunzo ine chekuita nebvunzo yako.
