0
Which cell feature of a membrane describes whether molecules can cross the membrane?
Trevorgoulder
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Which feature of a membrane describes molecules whether can cross the membrane?
permeability
What feature of membrane describes whether molecules can cross the membrane?
permeabiity
Which feature of a memebrane describes whether molecules can cross the membrane?
permeability
What feature of a membrane describes whether molecules can cross the membrane?
permeabiity
What feature of a membrane describes whether molecule can cross the membrane?
permeabiity
Which molecule of a membrane describes whether molecules can cross the membrane?
permeability
Which feature of a cell membrane determines whether molecules can cross the membrane?
They must either be lipid soluble (e.g. steroids) or very small (e.g. ions).
What is a factor that determines whether a molecules can cross a cell membrane?
mass
Which is a factor that determies whether a mole can cross a cell membrane?
Lipid solubility determines if it will diffuse across. The presence of specific protein carrier molecules determines if it will be transported across the membrane.
Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
Why is glucose allowed to pass through a semipermeable membrane and not starch?
Whether molecules are able to pass through the membrane depends on the size of the molecules. Smaller ones can, and larger ones cannot. Glucose can pass through a cell membrane because it is a monomer, which is a smaller molecule than the polymer molecules of starch.
What are two factors that determine whether or not molecules can pass through a selectively permeable membrane?
One factor is the channel of the molecule, without them the ions and polar molecules would not be able to pass across. Another factor is the size of the molecule, they determine how fast it will defuse.
