Ib lub xovtooj tshwj xeeb pom hauv nitrogen-fixing cyanobacteria . Heterocysts yog cov hlwb loj nrog cov phab ntsa tuab thiab lawv tsis muaj chlorophyll, ua rau lawv tsis muaj xim. Lawv yog qhov chaw ntawm nitrogen fixation, uas lawv tsim cov enzyme nitrogenase nitrogenase MoFe protein yog ib tug heterotetramer uas muaj ob α subunits thiab ob β subunits, nrog ib tug loj ntawm kwv yees li 240-250kDa. https://en.wikipedia.org › wiki › Nitrogenase
Nitrogase - Wikipedia
Dab tsi yog heterocysts qhov twg lawv pom Chav Kawm 11?
Hint: Heterocysts yog cov hlwb tsis muaj xim pom nyob rau hauv cyanobacteria uas ua raws li qhov chaw rau kev kho nitrogen. Kev sib txuas Plasmodesmata txuas cov hlwb no nrog cov hlwb nyob ib puag ncig thiab pab lawv kom tau txais cov as-ham los ntawm lawv.
Yuav ua li cas hu ua heterocysts?
Heterocysts (Daim duab 3(c), 3(g), thiab 3(i)) yog morphologically txawv hlwb uas txhim kho teb rau qhov tsis muaj cov khoom siv nitrogen sib xyaw hauv ib puag ncig. … Heterocysts yog tib lub hlwb uas qhia txog nif (nitrogen fixation) noob thiab synthesize nitrogenase hauv heterocyst-forming cyanobacteria.
heterocyst thiab piv txwv yog dab tsi?
Piv txwv li, heterocysts: tsim peb phab ntsa cell ntxiv, suav nrog ib qho ntawm glycolipid uas ua rau hydrophobic barrier rau oxygen. tsim nitrogenase thiab lwm yam proteins koom nrognitrogen fixation. … muaj cov polar plugs uas muaj xws li cyanophycin uas ua rau qeeb cell-to-cell diffusion.
Yuav ua li cas heterocysts tsim?
Thaum heterocyst-forming cyanobacteria tau loj hlob nrog cov nitrogen ruaj khov, lawv cov hlwb ("cov hlwb"), koom ua ke hauv filaments, tshwm sib npaug. Thaum cov filaments ntawm Anabaena yog deprived ntawm taag nitrogen, cov hlwb ntawm semiregular intervals raws filaments sib txawv rau hauv heterocysts.
