Is the DNA in prokaryotic cells organized?
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In prokaryotes, the genome is composed of a single, double-stranded DNA molecule in the form of a loop or circle . The region in the cell containing this genetic material is called a nucleoid (remember that prokaryotes do not have a separate membrane-bound nucleus).
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ᴅɴᴀ ᴏʀɢᴀɴɪᴢᴀᴛɪᴏɴ ɪɴ ᴘʀᴏᴋᴀʀʏᴏᴛᴇs
ɪɴ ᴘʀᴏᴋᴀʀʏᴏᴛᴇs, ᴛʜᴇ ɢᴇɴᴏᴍᴇ ɪs ᴄᴏᴍᴘᴏsᴇᴅ ᴏғ ᴀ sɪɴɢʟᴇ, ᴅᴏᴜʙʟᴇ-sᴛʀᴀɴᴅᴇᴅ ᴅɴᴀ ᴍᴏʟᴇᴄᴜʟᴇ ɪɴ ᴛʜᴇ ғᴏʀᴍ ᴏғ ᴀ ʟᴏᴏᴘ ᴏʀ ᴄɪʀᴄʟᴇ. ᴛʜᴇ ʀᴇɢɪᴏɴ ɪɴ ᴛʜᴇ ᴄᴇʟʟ ᴄᴏɴᴛᴀɪɴɪɴɢ ᴛʜɪs ɢᴇɴᴇᴛɪᴄ ᴍᴀᴛᴇʀɪᴀʟ ɪs ᴄᴀʟʟᴇᴅ ᴀ ɴᴜᴄʟᴇᴏɪᴅ (ʀᴇᴍᴇᴍʙᴇʀ ᴛʜᴀᴛ ᴘʀᴏᴋᴀʀʏᴏᴛᴇs ᴅᴏ ɴᴏᴛ ʜᴀᴠᴇ ᴀ sᴇᴘᴀʀᴀᴛᴇ ᴍᴇᴍʙʀᴀɴᴇ-ʙᴏᴜɴᴅ ɴᴜᴄʟᴇᴜs).
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