× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
w
3
w
3
e
3
3
r
3
g
2
2
b
2
M
2
V
2
f
2
c
2
Home Q & A Board Biology-Related Homework Help Cell Biology
New Topic  
Kbennallack656 Kbennallack656
wrote...
Posts: 711
Rep: 0 0
6 years ago
A bacterium has the following lac operon genes located on the chromosome: I+PZYA+. On a plasmid, this same bacterial cell has the lac genes IP+ZY+A. Which protein products will be made from lac genes in response to the presence of lactose?
 
  What type of protein expression (induced or constitutive) will there be for each protein that is made?
  What will be an ideal response?
Read 61 times
1 Reply

Related Topics

Replies
wrote...
#1
6 years ago
Answer: Based on this information the lac repressor protein R will be made and will be functional in the absence of lactose. However, the lac operon on the chromosome does not have a functioning promoter; thus only the plasmid-encoded copy will be transcribed efficiently in the presence of lactose. The plasmid contains only one normal lac gene, lac Y; therefore, the cell will make only galactoside permease and will not be able to use lactose for growth and energy production.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  604 People Browsing
 131 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 223
  
 109
  
 109
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 486
Previous poll results: Do you believe in global warming?