Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Cell Biology
New Topic  
davashkai davashkai
wrote...
Go to Answer
Posts: 100
Rep: 0 0
11 years ago
A. They prevent the passage of amino acids through the membrane
B. They allow movement of salts and sugars through the plasma membrane
C. They identify the cell
D. They allow movement of water through the plasma membrane
Read 661 times
2 Replies
Replies
Answer accepted by topic starter
JulianJulian
wrote...
#1
Posts: 46
Rep: 1 0
11 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

wrote...
#2
11 years ago
In answering this question, consider the difference between osmosis and facilitated diffusion.

(A) is obviously wrong, since a CHANNEL protein is obviously acting as a facilitator to move something (that's what a channel does, right? it's a passage for something).

(C) has to be wrong. Transport proteins don't identify anything.

(D) This is done by osmosis and a concentration gradient, which does not need facilitators.

Process of elimination declares (B) is correct and I concur. Macromolecules need facilitation to move through the plasma membrane, and that's what the lipoproteins are for. Slight Smile

Hope that helped!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  877 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 745
  
 286
  
 263