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Where in the cell is the nuclear pores located?
Nuclear pores are present in the nuclear envelope of a cell. They are specialized protein structures that act as gateways for the transport of molecules such as RNA and proteins between the nucleus and the cytoplasm.
What molecules can freely cross the plasma membrane?
Proteins, Carbohydrates, and Cholesterol. (Check out, 'fluid mosaic')
Which feature of a memebrane describes whether molecules can cross the membrane?
permeability
What materials crossed the membrane and why did they cross?
Materials that can cross the cell membrane include small non-polar molecules like oxygen and carbon dioxide, as well as small polar molecules like water. These molecules can freely pass through the lipid bilayer of the membrane due to their small size and compatibility with the hydrophobic environment of the lipid tails. However, larger molecules and charged ions require specific protein channels or transporters to cross the membrane.
Why does hydrophobic molecules cross the plasma membrane while hydropilic cannot?
Hydrophobic molecules can easily cross the plasma membrane because they are nonpolar and can dissolve in the lipid bilayer, allowing them to pass through without assistance. In contrast, hydrophilic molecules are polar and cannot easily penetrate the hydrophobic core of the membrane, which acts as a barrier to their passage. As a result, hydrophilic substances often require specific transport proteins or channels to help them cross the membrane.
Can small hydrophobic molecules cross the cell membrane?
Yes, small hydrophobic molecules can cross the cell membrane.
Can nonpolar molecules cross the cell membrane?
Yes, nonpolar molecules can cross the cell membrane through simple diffusion.
Can polar molecules cross the cell membrane?
Yes, polar molecules can cross the cell membrane through facilitated diffusion or active transport.
What feature of membrane describes whether molecules can cross the membrane?
permeabiity
Which molecule of a membrane describes whether molecules can cross the membrane?
permeability
Which feature of a membrane describes molecules whether can cross the membrane?
permeability
The side from which more water molecules cross the semipermeable membrane?
The pure solvent side is the side from which more water molecules cross the semipermeable membrane.
What is most likely to occur if the sugar molecules cross the membrane?
Sugar molecules move outside of the membrane.
Why can hydrophobic molecules cross the membrane?
Hydrophobic molecules can cross the cell membrane because the membrane is made up of a double layer of lipids, which are also hydrophobic. This allows hydrophobic molecules to pass through the membrane easily, while hydrophilic molecules have a harder time crossing.
Can small polar molecules cross the cell membrane?
Yes, small polar molecules can cross the cell membrane through a process called passive diffusion.
What is mosly likely to occur if the sugar molecules can cross the membrane?
sugar molecules move outside of the membrane. novanet
Where in the cell is the nuclear pores located?
Nuclear pores are present in the nuclear envelope of a cell. They are specialized protein structures that act as gateways for the transport of molecules such as RNA and proteins between the nucleus and the cytoplasm.
