Course Contents. Homework 4 16 (8 pts) O Timer Notes Id Evaluate Feedback Print
ID: 197998 • Letter: C
Question
Course Contents. Homework 4 16 (8 pts) O Timer Notes Id Evaluate Feedback Print True or false? Membrane asymmetry is created because phospholipids are initially inserted in one leaflet of a bilayer and proteins that are postulated to act as 'flippases" then selectively translocate some holipids and slowly translocate others. In cell membranes, cholesterol decreases membrane fluidity above the transition temperature, but increases membrane fluidity below the transition temperature Detergents are cylindrically shaped molecules that work by forming a bilayer that surrounds grease droplets Myristoyl, palmitoyl, and farnesyl groups anchor otherwise soluble proteins to the extracytoplasmic face of the plasma membrane C 18:2 linoleic acid will have a higher melting point than C18:0 stearic acid -In active transport, the transported species moves across the membrane against a concentration gradient Membrane phospholipids can be isolated from homogenized tissues by extracting them into single phase mixtures containing chloroform, methanol, and water The steroid nucleus is made from five carbon units that each contain one carbon-carbon double bond and one side-branching methyl group. Subrnit Answer Tries 0/99Explanation / Answer
The membrane is asymmetric because phospholipids are distributed asymmetrically across the lipid bilayer. It has different composition on one side and other sides respectively. It can be caused by different positioning of proteins. This asymmetry allows the membrane to have a different intracellular and extracellular environment. So,the following statement is false.