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What large molecules need help getting across cell membrane?
In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
Do large cells move across the cell membrane quickly?
A large cell will never move across an intact cell membrane.
What molecules will move easily across the cell membrane: large proteins, starch, water, or DNA?
It depends on the membrane, but generally water is the only one that will move across unaided. The rest are too large.
What are three macromolecules that cannot diffuse across a cell membrane?
Any protein, any fat, and most polypeptides.
When does diffusion occur across a cell membrane?
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
Why can oxygen diffuse across a cell but a protein cannot?
Oxygen is much smaller than a protein.proteins are too largeDifference in size
How do large cells move across the cell membrane?
There cannot be large cells inside a cell.
What large molecules need help getting across cell membrane?
In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
What molecule is able to easily diffuse across the cell's membrane?
Carbon dioxide, oxygen and some nonpolar molecules diffuse easily.
What are 2 substances that diffuse freely across a cell membrane?
CO2, H2O, and O2 can all diffuse across a cell membrane. Also, small polar molecules (uncharged) and hydrocarbons easily diffuse across.
Do large cells move across the cell membrane quickly?
A large cell will never move across an intact cell membrane.
Ions cannot cross back and forth across the neuron cell membrane?
Water diffuses across the plasma membrane, and this can affect cell size and .... proceeds, the different type cells of the embryo develop their ... or ion so that it can cross the plasma .... molecules cannot cross the membrane because they are un- able to ... plasma membrane and the back and forth arrows indicate that these.
What molecules will move easily across the cell membrane: large proteins, starch, water, or DNA?
It depends on the membrane, but generally water is the only one that will move across unaided. The rest are too large.
Why do molecules easily diffuse across a cell membrane while glucose molecules do not?
Glucose is too big to pass throught.
How does the cell transport materials across the cell membrane?
a cell transports things across the cell membrane from areas of high concentration to ares of low concentration
What are three macromolecules that cannot diffuse across a cell membrane?
Any protein, any fat, and most polypeptides.
When does diffusion occur across a cell membrane?
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
