Lecture 15 Membranes II Agbas Flashcards
Which of the following from each of the three sets make the membrane less fluid? Long or short tails, kinked or straight tales, more or less cholesterol?
Long, straight, less cholesterol
Where are most of the proteins for mitochondria made? In the mitochondria from its own DNA or from the cell nucleus’s DNA
Cell nucleus
A higher melting point means, a more or less rigidity?
More rigid. Caused by saturation, longer tails, less cholesterol.
Is membrane fluidity important to cell signaling and transduction?
More or less fluidity helps with cell signaling?
Yes he made a point of this,
More fluidity eases cell signaling
Lipids in membranes can move in two different ways but predominately move in which way, and not which way?
Predominately laterally and rarely flipping sides or leaflets
FRAP stands for what and is used to view what?
Florescence recovery after photobleaching
Used to view dynamics of the membrane.
As far as symmetry, All biological membranes are __________? This means that?
asymmetric
composition of inner and outer membrane is different
In general what is the name for the polysaccharide or glycoprotein covering on a cell surface called?
Glycocalyx
What do we called the protein entities that have sugars attached to them on the cell membrane? Their responsibility?
glycoproteins used in cell signaling, recognition and more.
peripheral membrane proteins are attached to the membrane only by __________ interactions with other integral membrane proteins?
noncovalent
Dont get confused Glycoprotein and proteoglycan… which is consisted mainly of protein and which mainly of sugar?
Glycoprotein is consisted manly of protein and on the other hand proteoglycan is consisted manly of “glycan” (=sugar component).
