Cov Lus Nug Piv Txwv Sib Tham Txog Ntau Yam Khoom Siv Organic Tseem Ceeb Thiab Lawv Cov Txiaj Ntsig
Pendahuluuan
Cov tshuaj organic yog ib qho tseem ceeb ntawm cov tshuaj lom neeg hauv lub neej. Cov tshuaj no feem ntau muaj cov pa roj carbon hauv lawv cov qauv molecular thiab ua lub luag haujlwm tseem ceeb hauv ntau yam txheej txheem ntawm lub cev. Tsab xov xwm no yuav tham txog ntau cov tshuaj organic tseem ceeb, ua tiav nrog cov teeb meem piv txwv thiab kev sib tham kom nkag siab zoo dua txog lawv cov txiaj ntsig.
Cov Tshuaj Organic Tseem Ceeb
1. Cov Khoom Noj Uas Muaj Carbohydrate
Kev Txhais thiab Kev Ua Haujlwm
Cov carbohydrates yog cov organic compounds uas muaj carbon, hydrogen, thiab oxygen, feem ntau yog 2:1 piv. Lawv ua lub cev lub zog tseem ceeb. Piv txwv li cov carbohydrates muaj xws li glucose, fructose, thiab sucrose.
Piv txwv txog teeb meem
Lo lus nug:
Xam qhov ntau ntawm ATP tsim tawm los ntawm kev ua haujlwm ntawm ib lub molecule glucose los ntawm kev ua pa ntawm tes.
Kev Sib Tham:
Kev ua pa ntawm lub cev muaj xws li:
- Glycolysis: tsim 2 ATP.
- Lub voj voog Krebs (Citric Acid Cycle): txhua lub molecule glucose tsim 2 ATP los ntawm ob lub voj voog.
- Cov saw hlau thauj khoom hluav taws xob thiab oxidative phosphorylation: tsim tawm txog 34 ATP.
Tag nrho cov ATP tsim los ntawm ib lub molecule glucose yog:
2 (Glycolysis) + 2 (Krebs Cycle) + 34 (Electron Transport Chain) = 38 ATP.
Txawm li cas los xij, vim tias cov txheej txheem ntawm kev thauj NADH los ntawm cytoplasm mus rau mitochondria xav tau lub zog, feem ntau tsuas yog kwv yees li 36 ATP yog tsim los ntawm ib lub molecule glucose.
2. Cov roj (lipids)
Kev Txhais thiab Kev Ua Haujlwm
Cov roj lipid muaj xws li cov rog, roj, phospholipids, thiab cov tshuaj steroids. Lawv ua haujlwm ua cov chaw khaws zog, cov khoom tsim ntawm cov cell membranes, thiab cov cim tshuaj hormones.
Piv txwv txog teeb meem
Lo lus nug:
Muaj pes tsawg lub zog raug tso tawm los ntawm kev oxidation ntawm ib lub molecule ntawm stearic acid (C18H36O2) hauv kev ua pa ntawm tes?
Kev Sib Tham:
Cov roj (lipids) tsim tau zog ntau dua li cov carbohydrates. Piv txwv li, qhov oxidation ntawm ib lub molecule ntawm stearic acid ntawm β-oxidation thiab lub voj voog Krebs tsim tau ntau ATP:
– Txhua lub molecule ntawm stearic acid tsim tawm 9 lub molecule ntawm acetyl-CoA.
– Txhua acetyl-CoA tsim 10 ATP hauv lub voj voog Krebs.
- Tag nrho ATP los ntawm kev oxidation tag nrho ntawm stearic acid yog li 120 ATP.
3. Kev Cuam Tshuam
Kev Txhais thiab Kev Ua Haujlwm
Cov protein muaj cov amino acids uas ua haujlwm hauv yuav luag txhua txoj kev ua haujlwm ntawm lub cev. Lawv ua haujlwm ua cov enzymes, cov tshuaj hormones, thiab cov qauv cellular. Piv txwv li suav nrog cov enzyme amylase thiab cov tshuaj insulin.
Piv txwv txog teeb meem
Lo lus nug:
Sau lub npe thiab piav qhia lub luag haujlwm ntawm cov enzymes hauv kev tsim cov protein.
Kev Sib Tham:
- RNA Polymerase: Cov enzyme no synthesizes mRNA los ntawm ib tug DNA template thaum lub sij hawm transcription.
- Ribosomes: Cov protein-RNA complexes no yog qhov chaw uas mRNA raug txhais ua polypeptide saw.
- tRNA Synthetase: Cov enzyme no ua rau muaj kev sib txuas ntawm cov amino acids rau tRNA tsim nyog.
- Peptidyl Transferase: Ib feem ntawm ribosome uas ua rau muaj cov peptide bonds ntawm cov amino acids thaum lub sijhawm txhais lus.
4. Cov Nucleotides
Kev Txhais thiab Kev Ua Haujlwm
Cov nucleotides yog cov monomers uas ua cov nucleic acids (DNA thiab RNA). Lawv yog qhov tseem ceeb rau kev khaws cia thiab xa cov ntaub ntawv genetic thiab muab lub zog (piv txwv li, ATP).
Piv txwv txog teeb meem
Lo lus nug:
Piav qhia txog cov txheej txheem ntawm DNA replication hauv cov hlwb prokaryotic.
Kev Sib Tham:
DNA replication yog cov txheej txheem ntawm kev theej DNA mus rau hauv ob lub molecule zoo sib xws.
1. Kev Qhib (Qhib Helix): Lub enzyme helicase rhuav tshem cov hydrogen bonds ntawm nucleotides, cais ob txoj hlua DNA.
2. Kev Tsim Tshuaj Primer (Kev Tsim Tshuaj Primary): RNA primers raug tsim los ntawm primase.
3. DNA Synthesis (DNA Synthesis): DNA polymerase ntxiv cov nucleotides tshiab rau hauv DNA template raws li nws cov khub sib txuas ua ke.
4. Kev Sib Txuas thiab Kev Ntsuam Xyuas: Lub enzyme ligase txuas cov khoom Okazaki ntawm cov hlua lagging, thiab DNA polymerase kuaj xyuas thiab kho cov yuam kev.
5. Vitamin
Kev Txhais thiab Kev Ua Haujlwm
Cov vitamins yog cov organic compounds uas xav tau me ntsis tab sis tseem ceeb rau kev ua haujlwm ntawm lub cev. Lawv ua haujlwm ua coenzymes (piv txwv li, B-complex vitamins), antioxidants (vitamins C thiab E), thiab metabolic regulators (vitamin D).
Piv txwv txog teeb meem
Lo lus nug:
Lub luag haujlwm ntawm Vitamin C hauv tib neeg lub cev yog dab tsi thiab nws cov teebmeem yog dab tsi?
Kev Sib Tham:
- Lub luag haujlwm ntawm Vitamin C: Ua haujlwm ua antioxidant, pab txhawb kev tsim collagen, ua rau kom nqus tau hlau ntau ntxiv, thiab txhim kho lub cev tiv thaiv kab mob.
Cov Teeb Meem Tsis Txaus: Qhov tsis txaus Vitamin C tuaj yeem ua rau mob scurvy, uas yog tus yam ntxwv los ntawm kev qaug zog, mob nqaij thiab pob qij txha, ntshav pos hniav, ntshav tsis txaus, thiab qhov txhab kho qeeb.
Xaus
Cov organic compounds xws li carbohydrates, lipids, proteins, nucleotides, thiab vitamins yog cov khoom tseem ceeb hauv ntau yam txheej txheem biological. Kev nkag siab txog kev ua haujlwm thiab cov txiaj ntsig ntawm txhua yam ntawm cov tshuaj no yog qhov tseem ceeb hauv kev noj qab haus huv thiab tshuaj. Cov teeb meem piv txwv hauv tsab xov xwm no muab kev nkag siab tob dua txog seb cov tshuaj no ua haujlwm li cas thiab lawv qhov tseem ceeb hauv kev tswj hwm kev ciaj sia ntawm cov kab mob.
Tsab xov xwm no yuav pab cov nyeem ntawv nkag siab txog cov ntsiab lus tseem ceeb ntawm ntau yam organic compounds tseem ceeb thiab lawv cov txiaj ntsig, nrog rau txhim kho lawv lub peev xwm los tshuaj xyuas thiab daws cov teeb meem cuam tshuam hauv cov teb ntawm biochemistry thiab lub neej.
