Membrane Flashcards
The two basic components of a cell membrane consist of
phospholipids and proteins
According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly
randomly oriented in the membrane, with no fixed inside outside polarity.
According to the fluid mosaic model of membrane structure, “fluid” means
randomly oriented in the membrane, with no fixed inside outside polarity.
hich of the following cannot pass through the phospholipid bilayer directly?
carbon dioxide molecules
When hydrophilic molecules pass through the cell membrane, they require
transport protein
Large molecules, for example disaccharide and polysaccharide
cannot pass through the plasma membrane
Vesicles transporting between RER to golgi apparatus have membrane.
True
To perform extracellular secretion, the vesicle membrane will fuse with the cell membrane and become a part of it.
True
There are cholesterol in our membrane.
True
Charged ions, such as sodium ions and chloride ions can pass through the cell membrane via the phospholipid bilayer.
False
2 functions played by mosaic component
Transport
Enzymatic activity
Why is membrane FLUID in terms of chemical bonding?
Membrane is held together by HPHOBIC INTERACTIONS much weaker than covalent bonds
2 significance of being FLUId To cell functioning
- Growth
2. Cell sealing (EXO/ENDO cytosis) and mitosis
Why do phosolipids orient themselves like that in cell membrane?????
Based on LIKE DIssolve LIKE principle; hPHILIC head faces towards water outside cell and cytoplas
HPHOBIC tail orient to middle part as the donts like ze water
what cannot pass membrane
large molecules
