In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
Small nonpolar molecules, such as oxygen and carbon dioxide, can easily pass in and out of the cell through the lipid bilayer of the cell membrane. Water, although polar, can also move across the membrane relatively easily via specialized channels called aquaporins. Larger or charged molecules typically require specific transport proteins to facilitate their movement across the membrane.
Water is the molecule that will move easily across the cell membrane. It can cross the membrane through special channels called aquaporins. Large proteins, starch, and DNA are too large to pass through the membrane without assistance.
A large cell will never move across an intact cell membrane.
Any protein, any fat, and most polypeptides.
There cannot be large cells inside a cell.
In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
Carbon dioxide, oxygen and some nonpolar molecules diffuse easily.
Small nonpolar molecules, such as oxygen and carbon dioxide, can easily pass in and out of the cell through the lipid bilayer of the cell membrane. Water, although polar, can also move across the membrane relatively easily via specialized channels called aquaporins. Larger or charged molecules typically require specific transport proteins to facilitate their movement across the membrane.
Oxygen is much smaller than a protein.proteins are too largeDifference in size
Water is the molecule that will move easily across the cell membrane. It can cross the membrane through special channels called aquaporins. Large proteins, starch, and DNA are too large to pass through the membrane without assistance.
A large cell will never move across an intact cell membrane.
No, oxygen cannot directly diffuse across a cell membrane. Instead, it crosses the cell membrane with the help of specific transport proteins, such as aquaporins and oxygen channels. These proteins facilitate the movement of oxygen from areas of high concentration to low concentration.
Glucose is too big to pass throught.
a cell transports things across the cell membrane from areas of high concentration to ares of low concentration
Any protein, any fat, and most polypeptides.
Lipid-soluble substances, such as oxygen, carbon dioxide, and small non-polar molecules, easily diffuse across the cell membrane. These substances can pass through the lipid bilayer of the membrane without the need for specific transport proteins.