Question

Why is lactose considered as inducer in lac operon give reasom?

Answer 1

✔✔ᴄᴏʀʀᴇᴄᴛ ᴀɴꜱᴡᴇʀ✔✔

ᴛʜɪs ᴄʜᴀɴɢᴇ ɪɴ ᴛʜᴇ ʟᴀᴄ ʀᴇᴘʀᴇssᴏʀ ɪs ᴄᴀᴜsᴇᴅ ʙʏ ᴛʜᴇ sᴍᴀʟʟ ᴍᴏʟᴇᴄᴜʟᴇ ᴀʟʟᴏʟᴀᴄᴛᴏsᴇ, ᴀɴ ɪsᴏᴍᴇʀ (ʀᴇᴀʀʀᴀɴɢᴇᴅ ᴠᴇʀsɪᴏɴ) ᴏғ ʟᴀᴄᴛᴏsᴇ.
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ᴀʟʟᴏʟᴀᴄᴛᴏsᴇ ʙɪɴᴅs ᴛᴏ ᴛʜᴇ ʟᴀᴄ ʀᴇᴘʀᴇssᴏʀ ᴀɴᴅ ᴍᴀᴋᴇs ɪᴛ ᴄʜᴀɴɢᴇ sʜᴀᴘᴇ sᴏ ɪᴛ ᴄᴀɴ ɴᴏ ʟᴏɴɢᴇʀ ʙɪɴᴅ ᴅɴᴀ. 
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ᴀʟʟᴏʟᴀᴄᴛᴏsᴇ ɪs ᴀɴ ᴇxᴀᴍᴘʟᴇ ᴏғ ᴀɴ ɪɴᴅᴜᴄᴇʀ, ᴀ sᴍᴀʟʟ ᴍᴏʟᴇᴄᴜʟᴇ ᴛʜᴀᴛ ᴛʀɪɢɢᴇʀs ᴇxᴘʀᴇssɪᴏɴ ᴏғ ᴀ ɢᴇɴᴇ ᴏʀ ᴏᴘᴇʀᴏɴ.

✔✔✔✔ʜᴏᴩᴇ ʜᴇʟᴩ ᴜ✔✔✔✔

Answer 2

HELLO FRIEND HERE IS UR ANSWER

This change in the lac repressor is caused by the small molecule allolactose, an isomer (rearranged version) of lactose. 

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