Select the single best answer.The composition of a cell membrane is not uniform for all types of cells. Some cell membranes aremore rigid than others. Rigidity is determined by a variety of factors, one of which is the structure ofthe carbon chains in the phospholipids that comprise the membrane. Two examples of phospholipidsare shown below, with one having C-C double bonds in its carbon chains. Which phospholipidwould be present in the more rigid cell membrane?CH2Compound A:H-C-(CH3)9NCH,CH2-0-P-0-CH2CH2-OCompound B:Н-с—о.(CHa)ÑCH,CH2-O-P-0-CH2Compound ACompound B

Phospholipid are lipid mainly found in cell membrane and are composed of two fatty acids, a glycerol…

Answered: Select the single best answer. The…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Thinking about cell membranes. a) The fatty acid tails of the phospholipids that make up cell membranes canbe either saturated or unsaturated. Which type of lipid will lead to a membranewith more mechanical strength? Explain your answer. b) One difference between bacterial and eukaryotic membranes is the presenceof cholesterol in eukaryotic membranes. What is the structure of cholesterol?Explain how adding cholesterol to a phospholipid membrane will affect thestability of the membrane. c) “Anammox” bacteria are unique in that they can perform anaerobic ammoniaoxidation, or the production of nitrogen gas from ammonia (Damasté et al. Nature2002, 419, 708.). Intermediates along this reaction pathway include hydrazine(N2H4) and hydroxylamine (NH2OH), both of which are extremely toxic to the cell.The ammonia oxidation reactions are believed to occur inside a membrane-bound structure within the cell called the “anammoxosome.” The structure of oneof the lipids of the anammoxosome is shown…
Select all that apply. This is an image of a plasma membrane, which consists of two layers of phospholipids. The red bubbles are the hydrophilic heads of phospholipids, facing the cell interior and exterior. The yellow strings facing inside of the plasma membrane are the fatty acid tails. Which of the following bonds/interactions do you think could regulate the assembly of the plasma membrane and the adhesion or fatty acid tails to each other? Select all that apply. hydrogen bonds covalent bonds electrostatic forces van der Waals forces hydrophobic force ionic bonds O O 0 0 O 0
. Cholesterol is an integral part of plasma membranes. Based on its structure, where is it found in the membrane? On the extracellular surface embedded with the phospholipid heads within the tail bilayer attached to the intracellular surface
Please ASAP. Thanku. Which of the following can undergo simple diffusion through a phospholipid bilayer? K+ H2O CO2 Glucose
Hi, can I please have an explanation about : if it would be possible for phospholipids to switch roles with triglycerides ? And similarities and differences in structures of phospholipids and triglycerides. Thank you!
All proteins . (Choose the most complete answer.) Group of answer choices have the same number of amino acids are synthesized on ribosomes and are made of amino acids connected by peptide bonds are made of amino acids connected by peptide bonds only are synthesized on ribosomes only
Choose the TRUE statement. A phospholipid micelle (not a liposome) can be characterized as Forming a water in oil dispersion Having polar heads group-oriented inward AN aggregate forming below critical micellar concentration Having polar groups oriented outward. A spherical species featuring a double layer of phospholipid surrounding an aqueous compartment.
The melting point of a lipid bilayer of the lipid tails. O increases with increasing chain length, and decreases with increasing amount of unsaturation O increases with increasing chain length, and increases with increasing amount of unsaturation O decreases with increasing chain length, and increases with increasing amount of unsaturation O decreases with increasing chain length, and decreases with increasing amount of unsaturation
O d. Cooking oils e. Stearic acid (saturated fatty acids) Chitin, the structural polysaccharide forming the exoskeleton of arthropods has which of the following linkages Select one: O a. Hydrogen bonds O b. Glycosidic linkage between B glucose c. Ester linkage between a glucose O d. Ester linkage between B glucose O e. Glycosidic linkage between a glucose Finish attempt . e
solute. A A A "pong" E "ping" lipid bilayer A OUTSIDE electrochemical A gradient INSIDE A A carrier protein mediating facilitated diffusion This diagram gives an example of facilitated diffusion active transport coupled transport O simple diffusion
Image analysis. The outer boundary of the cell is the plasma membrane.In the image below, molecules that cannot cross the membrane are glucose and ions.Why can't they cross the membrane? [MA] (c) (d) (a) Small uncharged molecules (b) Lipid-soluble Water-soluble substances lons substances Glucose Hydrocarbon Nat K+ H20 CO2 H+ cF Cat+ NH3 O They are hydrophobic O They are hydrophilic O large O Na, K, Ca and H ions will bind with phosphate Chloride ions will be repelled by phosphate they are small in size to
(a). Phospholipids are amphipathic molecules which have hydrophilic and hydrophobic regions. Explain how this feature benefits the cell. (Give ONE reason) (2) (b). Give ONE difference between a saturated phospholipid and an unsaturated phospholipid. (2)

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