Suppose that the galA gene was regulated by a repressor. Which of the following would be correct? Check all that apply.
1) The repressor for the galA gene would bind to DNA in the presence of galactose.
2) The repressor for the galA gene would not bind to DNA in the presence of galactose.
3)The repressor for the galA gene would bind to DNA in the absence of galactose.
4)The repressor for the galA gene would not bind to DNA in the absence of galactose.

Question

anonymous · Answer

2 and 3

anonymous · Answer

Got it thanks!

anonymous · Answer

great! Now can I have my medal if you please (: 
have you gotten the second part of this question right?

anonymous · Answer

Yes :-)
Sorry for the delay...

anonymous · Answer

Could you tell me what is the answer for the second part please? Oh if you need help in another part of the problem set, let me know! I am only having trouble in part2 small gene in a plasmid. a,b, d ,e and h.
 You know that the argB gene is regulated, but you do not know if the regulatory protein is an activator or a repressor. You find a mutant strain of this bacterium where the gene encoding the regulatory protein has been deleted, so no regulatory protein is expressed. This strain produces the argB protein in the presence of arginine. Which of the following statements is correct?

a. repressor
b. activator
c. either repressor or activator?

anonymous · Answer

ArgB protein is expressed by a repressor.

anonymous · Answer

awesome thanks! I also got the answers for 2 a, b, c ,d , f and g. You need them or have you already used up your submissions? Could you help me for 2 e and h?

anonymous · Answer

I got both questions wrong. Good luck!

anonymous · Answer

Thanks! i got the last one correct but have no idea where to place the bars in the graph in part e. oh I should advice you to withhold your submissions until the last day, just save your answers first and only once you are sure of the answer should you hit check. Do that in the finals! Thanks for the medal and the last answer again. :)

anonymous · Answer

You are right. I will follow your advice. Thanks!

anonymous · Answer

Actually on this one I did stupid mistakes...