Question

Some solutes are able to pass directly through the lipid bilayer of a plasma membrane, whereas other solutes require a transport protein or other mechanism to cross between the inside and the outside of a cell. The fact that the plasma membrane is permeable to some solutes but not others is what is referred to as selective permeability.Which of the following molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism? Select all that apply.
a) proteinsb) water
c) ions
d) sucrose
e) lipids
f) carbon dioxide
g) oxygen

Answer 1

Answer:

Some solutes are able to pass directly through the lipid bilayer of a plasma membrane, whereas other solutes require a transport protein or other mechanism to cross between the inside and the outside of a cell. The fact that the plasma membrane is permeable to some solutes but not others is what is referred to as selective permeability.Which of the following molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism?

carbon dioxide

oxygen

lipids

water

sucrose

Explanation:

Ions and proteins can not pass through a lipid bilayer without transport protein, this enables its permeability to those ions

Answer 2

B) water and g) oxygen