Proteins do not pass through cell membranes because?

Question

a. the membrane is made of protein

b. they contain nitrogen

c. they are very large molecules

d. they cause emulsifaction

e. the cause digestion of the cell

Answer 1

C. they are very large molecules.

Answer 2

Hmmmm...... One of those stupid trick questions.  There is so much more to it than that but the teacher has probably mentioned in the lecture the answer that he/she wants.

"A component of every biological cell, the selectively permeable cell membrane (or plasma membrane or plasmalemma) is a thin and structured bilayer of phospholipid and protein molecules that envelopes the cell. It separates a cell's interior from its surroundings and controls what moves in and out. Cell surface membranes often contain receptor proteins and cell adhesion proteins. There are also other proteins with a variety of functions. These membrane proteins are important for the regulation of cell behavior and the organization of cells in tissues."

SOOOOO.... your answer is.......a and c, both are correct.  Hah!

Answer 3

c,because cell membrane is semipermeable in nature.so due to large size of protein molecule it does not allow to pass through it

Answer 4

c

Answer 5

100% C. i studied this a few months ago :)

Answer 6

It's C.  Proteins are much to large to pass through cellular membranes.

A is not correct.  Membranes contain proteins but are not made of them.  They are made from phospholipids.