Welcome Guest Search | Active Topics |

Tag as favorite
The Lac Operon
Options
Previous Topic Next Topic
Mohamed_5496
#1 Posted : Friday, June 05, 2020 2:31:32 PM
Rank: Newbie

Groups: Registered
Joined: 5/2/2020
Posts: 1

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi,

on page 17 of lesson 2.1 microbiology in the classroom companion, it says that the presence of lactose can only induce transcription of the lac operon only when glucose is not present. Why does the operon not work when their is glucose?
Back to top
Report?
INSTR_Katerina_102
#2 Posted : Sunday, June 07, 2020 5:50:07 PM
Rank: Advanced Member

Groups: Registered
Joined: 6/24/2019
Posts: 250

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi,

Bacteria love glucose, and so it is their fuel of choice when deciding what to eat. The purpose of the lac operon is to consume lactose to fill its energy needs when there is nothing else available.

If glucose is present however, than the bacteria doesn't need to digest lactose, and therefore does not express the lac operon.
Back to top
Report?
Users browsing this topic
Guest (2)
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.069 seconds.