× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
7
6
o
5
b
4
s
3
j
3
b
3
m
3
K
3
g
3
L
3
w
3
Home Q & A Board Biology-Related Homework Help Zoology and Botany (Moderator: ehd123)
New Topic  
msw2 msw2
wrote...
Go to Answer
Posts: 697
Rep: 0 0
6 years ago
A scientist measuring the rate of uptake of radiolabeled alanine by cultured cells finds that rates are faster when the experiments are carried out in a buffered, balanced salts solution than when the experiments are carried out in a complete (containing all nutrients required for survival and growth) medium. The most likely explanation for this observation is
 a. the concentration gradient for alanine is steeper in the former case than the latter.
  b. the crenation (shrinkage of cells) in the salts solution increases the surface area-to-volume ratio for the cells increasing the rate of diffusion.
  c. the absence of amino acids in the balanced salts solution decreases the abundance of molecules competing for transport, and therefore increases the apparent transport rate.
  d. the temperature of the balanced salt solution is higher, so rates of transport are greater.
  e. no response provides a valid answer.
Read 48 times
1 Reply
Replies
Answer verified by a subject expert
msbrit90msbrit90
wrote...
#1
Top Poster
Posts: 1147
Rep: 10 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

msw2 Author
wrote...

6 years ago
Smart ... Thanks!
Jadakiss
wrote...

Yesterday
This helped my grade so much Perfect
brina10
wrote...

2 hours ago
Brilliant ツ
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1067 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 248
  
 1064
  
 282
Your Opinion
Do you believe in global warming?
Votes: 422
Previous poll results: What's your favorite funny biology word?