Why should triacylglycerol be insignificant component of plasma membrane ?

Name the three groups into which membrane-associated proteins may be classified. Explain the mechanism by which each group associates with a biomembrane.

Phospholipids are the only molecule type which make up lipid bilayers in plasma membranes True or False

would substances be able to pass through the plasma membrane if the phospholipi tails of the plasma membrane were oth satueated fatty acids? why or why not, explain?

For plasma membrane, what macromolecules (carbohydrates, proteins, lipids, or necleic acids contribute to the organelle function

Which of these general statements is TRUE about the lipid called phosphatidylethanolamine (or PE)? PE is NOT an aminophospholipid. 3 of these 4 responses are correct PE resides mainly in the outer leaflet of the membrane bilayer. PE is zwitterionic at normal cell pH. PE is a type of cholesterol.

Which of the following subcellular structures facilitates intracellular transport?     lysosomes   peroxisomes   vesicles   ribosomes

3)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)phospholipids b) steroid hormones c) Cholesterol 4)Which one of the following influences the rate at which diffusion can occur? Size of the concentration gradient Mass of the molecule Distance All of the above affect diffusion None of the above affect the diffusion rate

Proteoglycan aggregates in tissues form hydrated, viscousgels. Can you think of any obvious mechanical reason whytheir capacity to form gels is important to cell function?[Hint: Liquid water is virtually incompressible.]

Hydrogen ions are charged. What would need to happen to transport them across a cell membrane, and which direction would they "flow"? What would have to happen to get them to move the other way? pH 7 000000000000000000 ||||||||||| ||||||| -----------|||||||||||||| 000000000000000000 pH 2