The answer is B. Ca2+

Here's the step by step explanation:

A. Aldosterone is a steroid hormone. It can easily cross the cell membrane because it is lipid-soluble.

B. Ca2+ is a calcium ion. It is a charged particle and cannot cross the lipid bilayer of the cell membrane easily. Therefore, it requires a protein channel to help it cross the membrane.

C. O2 is a small, nonpolar molecule. It can easily diffuse across the cell membrane without the need for a protein channel.

D. CO2, like O2, is also a small, nonpolar molecule that can easily diffuse across the cell membrane without the need for a protein channel.

Therefore, out of the given options, Ca2+ is most likely to use a protein channel to cross the eukaryotic cell membrane.

Question

The answer is B. Ca2+

Here's the step by step explanation:

A. Aldosterone is a steroid hormone. It can easily cross the cell membrane because it is lipid-soluble.

B. Ca2+ is a calcium ion. It is a charged particle and cannot cross the lipid bilayer of the cell membrane easily. Therefore, it requires a protein channel to help it cross the membrane.

C. O2 is a small, nonpolar molecule. It can easily diffuse across the cell membrane without the need for a protein channel.

D. CO2, like O2, is also a small, nonpolar molecule that can easily diffuse across the cell membrane without the need for a protein channel.

Therefore, out of the given options, Ca2+ is most likely to use a protein channel to cross the eukaryotic cell membrane.

Knowee AI · Accepted Answer

The answer is B. Ca2+

Here's the step by step explanation:

A. Aldosterone is a steroid hormone. It can easily cross the cell membrane because it is lipid-soluble.

B. Ca2+ is a calcium ion. It is a charged particle and cannot cross the lipid bilayer of the cell membrane easily. Therefore, it requires a protein channel to help it cross the membrane.

C. O2 is a small, nonpolar molecule. It can easily diffuse across the cell membrane without the need for a protein channel.

D. CO2, like O2, is also a small, nonpolar molecule that can easily diffuse across the cell membrane without the need for a protein channel.

Therefore, out of the given options, Ca2+ is most likely to use a protein channel to cross the eukaryotic cell membrane.

Which of the following is MOST likely to use a protein channel to cross the eukaryotic cell membrane? A.AldosteroneB.Ca2+C.O2D.CO2

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