Top Posters
Since Sunday
g
3
3
2
J
2
p
2
m
2
h
2
s
2
r
2
d
2
l
2
a
2
This topic contains 2 attachments.
Home Q & A Board Biology-Related Homework Help General Biology
New Topic  
PR3CiSiON PR3CiSiON
wrote...
Go to Answer
Posts: 2
Rep: 1 0
10 years ago Edited: 8 years ago, how_mendel
To confirm the semiconservative model of replication, it was important for Meselson and Stahl to quantify the amount of DNA in each band produced by density-gradient centrifugation. To accomplish this, they took advantage of the fact that DNA absorbs ultraviolet light, and used UV light to photograph each tube.
By scanning the UV photographs with a microdensitometer, graphs like the ones below were produced. The height of each peak in the graph is directly proportional to the concentration of DNA in the corresponding band. Also, the position of each peak reflects the 14N and 15N content of the band.
Suppose that the scientists analyzed the same amount of DNA (10 units) by density-gradient centrifugation after two, three, and four rounds of replication in 14N medium. What would you predict the microdensitometer graph would look like after each round?

Drag each microdensitometer graph to the appropriate bin.
 Attached file 
Thumbnail(s):
You must login or register to gain access to this attachment.
Read 30815 times
14 Replies
Replies
Answer verified by a subject expert
padrepadre
wrote...
#1
Staff Member
Educator
Top Poster
Posts: 21608
Rep: 4541 17
10 years ago
Sign in or Sign up in seconds to unlock everything for free
 Attached file 
Thumbnail(s):
You must login or register to gain access to this attachment.
flyology,  duddy,  ksjfghskd,  rodel,  dmarlo7,  diameesha,  imanibertran05
Mastering in Nutritional Biology
Tralalalala Slight Smile

Related Topics

wrote...
#2
10 years ago
Thank you!
adubioman
wrote...
#3
10 years ago
thanks!
wrote...
#4
9 years ago
Thanks a lot !
wrote...
#5
9 years ago
Thanks!
wrote...
#6
9 years ago
thanks
wrote...
#7
9 years ago
Thank you. This was helpful! This was a tricky one!!  Undecided
wrote...
#8
9 years ago
merci!
wrote...
#9
9 years ago
Wow! I never would have figured that out!
wrote...
#10
9 years ago
Thanks
wrote...
#11
9 years ago
Thanks
wrote...
#12
9 years ago
thanks
wrote...
#13
9 years ago
Thank you!
  New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1066 People Browsing
 124 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 4423
  
 107
  
 293
Your Opinion
How often do you eat-out per week?
Votes: 79
Previous poll results: Who will win the 2024 president election?