Which of the following correctly describes micelles?spherical structures formed by amphipathic lipids such as fatty acidssame as liposomesb)produced spontaneously by certain lipids, particularly glycerophospholipidsc)composed of lipid bilayers that wrap around to form spherical vesiclesconsist of multi-layered structures of lipid bilayers

Micelles: Aids absorption of lipids and fat soluble vitamins. Fatty acids aggregate in aqueous…

Answered: Which of the following correctly…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 4SA: Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids;...

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Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECM
Cell membranes consist mainly of ________ and ________. a. lipids; carbohydrates b. phospholipids; proteins c. lipids; carbohydrates d. phospholipids; ECM
Which of the following best describes the lipid aggregates known as liposomes? A. They contain a hollow non-aqueous interior cavity. B. They are spherical structures with their hydrophobic regions aggregated in the interior cavity. C. They form because the cross-sectional area of the head group is greater than that of the acyl side chain(s). D. They are derived from a bilayer sheet.
The lipid bilayer has membrane proteins spanning the membrane. They have a hydrophobic region embedded in the _______________ while the hydrophilic regions are on the ______________ and _______________ of the cell.
When cross sectional area of the head group is greater than that of the acyl side chain, which of the following lipid aggregates formation is favored?a) Micellesb) Bilayerc) Liposomed) Myelin sheath
Which of the following is not a lipid link that anchors membrane-associated proteins to the bilayer? Thioether-linked prenyl anchors. Ester-linked triacylglycerol anchors. Glycosyl phosphatidylinositol anchors. Thioester-linked fatty acyl anchors. Amide-linked myristoyl anchors.
Which of the following refer/s to lipid movement in membranes? I. transverse diffusion II. phospholipid fatty acyl chains bending III. lipids exchange places within one monolayer IV. lipids rotating within their original location I, II, III only I, II, III, IV I, III, IV only II, III, IV only
In a typical eukaryotic plasma membrane, _____.A. lipids can move and diffuse through the bilayerB. oligosaccharides face outward, not toward the cytosolC. proteins can move in and out of the bilayerD. all of the above
Which of the following statements are correct? Explain your answers. Lipids in a lipid bilayer spin rapidly around their long axis. Lipids in a lipid bilayer rapidly exchange positions with one another in their own monolayer. Lipids in a lipid bilayer do not flip-flop readily from one lipid monolayer to the other. Hydrogen bonds that form between lipid head groups and water molecules are continually broken and re-formed. Glycolipids move between different membrane-enclosed compartments during their synthesis but remain restricted to one side of the lipid bilayer. margarine contains more saturated lipids than the vegetable oil from which it is made. some membrane proteins are enzymes. The sugar layer that surrounds all cells makes cells more slippery.
Which of the following would you expect to be freely permeable through a pure lipid bilayer? molecular nitrogen fructose ATP sodium ions helium glucose glycine carbon dioxide
When cross sectional area of the head group and acyl side chain is similar, which of the following lipid aggregates formation is favored?a) Micellesb) Bilayerc) Liposomed) Myelin sheath
Choose the Incorrect statement. In the phospholipid bilayer part of the cell membrane. None of the statement are false Cholesterol is one of the major constituents Zwitterionic phospholipid are approximately equally distributed between inner and outer monolayers Negatively charged phospholipids are located in the inner monolayer facing cytoplasm Glycosylated lipids are located in the outer monolayer facing other cells

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