Question

write the function of heterocyst in nostoc ​

Answer 1

Answer:

Heterocysts are specialized, pale-yellow, thick-walled cells with the function of nitrogen-fixing formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica. They fix nitrogen from di-nitrogen (N2) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a micro anaerobic environment. Hence, their main function is nitrogen fixation.

Answer 2

ʜɪ ᴍᴀᴛᴇ:

ʜᴇᴛᴇʀᴏᴄʏsᴛs ᴀʀᴇ sʟɪɢʜᴛʟʏ ʟᴀʀɢᴇʀ ᴛʜᴀɴ ᴛʜᴇ ᴠᴇɢᴇᴛᴀᴛɪᴠᴇ ᴄᴇʟʟ. ɪᴛ ɪs ᴍᴀɪɴʟʏ ᴄᴏɴᴄᴇʀɴᴇᴅ ᴡɪᴛʜ ᴛʜᴇ ɴɪᴛʀᴏɢᴇɴ ғɪxᴀᴛɪᴏɴ ᴀɴᴅ sᴏᴍᴇᴛɪᴍᴇs ʀᴇᴘʀᴏᴅᴜᴄᴛɪᴏɴ ᴛᴏᴏ. ᴛʜᴇ ʜᴇᴛᴇʀᴏᴄʏsᴛs ʜᴀᴠᴇ ᴛʜɪᴄᴋ ᴛᴡᴏ ʟᴀʏᴇʀᴇᴅ ᴇɴᴠᴇʟᴏᴘᴇ ᴡɪᴛʜ ɪɴɴᴇʀ ᴡᴀʟʟs ғᴏʀᴍs ᴋɴᴏʙ ʟɪᴋᴇ ᴘʀᴏᴊᴇᴄᴛɪᴏɴs ɪɴᴛᴏ ᴛʜᴇ ᴄᴇʟʟ ᴄᴀᴠɪᴛʏ. ᴛʜᴇsᴇ ᴋɴᴏʙs ʟɪᴋᴇ ᴘʀᴏᴊᴇᴄᴛɪᴏɴs ᴀʀᴇ ᴋɴᴏᴡɴ ᴀs ᴛʜᴇ ᴘᴏʟᴀʀ ɴᴏᴅᴜʟᴇs ᴡʜɪᴄʜ ᴀʀᴇ ʀɪᴄʜ ɪɴ ᴇɴᴢʏᴍᴇs ɴɪᴛʀᴏɢᴇɴᴀsᴇ ᴀɴᴅ ʜʏᴅʀᴏɢᴇɴᴀsᴇ. ʀᴇᴘʀᴏᴅᴜᴄᴛɪᴏɴ ʙʏ ʜᴇᴛᴇʀᴏᴄʏsᴛ ɪs ᴀ ʀᴀʀᴇ ʙᴜᴛ ᴛʜᴇʏ ɢᴇʀᴍɪɴᴀᴛᴇ ɪɴ ᴄᴇʀᴛᴀɪɴ ᴄᴀsᴇs. ᴛʜᴇ ʜᴇᴛᴇʀᴏᴄʏsᴛs ᴀʀᴇ ʟɪʙᴇʀᴀᴛᴇᴅ ʙʏ ʙʀᴇᴀᴋɪɴɢ ᴛʜᴇɪʀ ᴡᴀʟʟs.

ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ

ᴛʜᴀɴᴋs ғᴏʀ ᴀsᴋɪɴɢ ᴀɴᴅ ᴋᴇᴇᴘ ᴀsᴋɪɴɢ ᴍᴏʀᴇ ✌✌