Homework Help: bio

Posted by Monique on Wednesday, March 21, 2012 at 10:37pm.

The cell membrane is a highly selective barrier that controls the movement of substances in and out of the cell. In fact, polar molecules are unable to go across unless

A. they are enclosed in water-filled vesicles.

B. they pass through channels in the cell membrane.

C. they are broken down into smaller pieces.

D. they react with other substances to become nonpolar.

bio - Anonymous, Friday, March 23, 2012 at 1:20am
d
bio - Marissia, Monday, April 2, 2012 at 10:48am
It's B I Got This Question On Study Island And Listened To This Guy Above And Got It Wrong. Its B
Bio - Anonymous, Thursday, October 25, 2012 at 9:19pm
Marissia is correct. It is B.
bio - Anonymous, Sunday, November 11, 2012 at 3:39pm
A
bio - Morgan, Monday, December 3, 2012 at 4:46pm
B
bio - ayan aidid, Sunday, December 9, 2012 at 4:25pm
B. they pass through channels in the cell membrane.
bio - erin, Monday, January 7, 2013 at 8:08pm
B
bio - ashley, Wednesday, February 13, 2013 at 9:07am
b
bio - margret, Monday, March 4, 2013 at 3:52pm
B
Any one who says different, either
1) doesn't know what they are talking about
or
2)
just want to watch you get it wrong.

If you want to answer a question like this please research before you post so that way other people will get it right.
Thanks! :)
bio - b, Thursday, April 18, 2013 at 11:09am
b
bio - chris, Tuesday, April 23, 2013 at 11:02pm
i got D
Biology - Mel, Saturday, May 11, 2013 at 8:14pm
Water is a polar molecule so it can go through the cell membrane but only by the openings/channels. So the answer is B and I also had this question on Study Island.

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