The image shows a lipid bilayer, with the polar heads represented by circles and the hydrophobic tails represented by lines. Arrange the fatty acids in the lipid bilayer to indicate a structure that, when incorporated into a phospholipid, would result in a more fluid membrane with a lower melting point. Be sure to insert the fatty acids into the bilayer in the correct orientation. Not all the fatty acids will be used. 500000 Answer Bank 11 11

The image shows a lipid bilayer, with the polar heads represented by circles and the hydrophobic tails represented by lines. Arrange the fatty acids in the lipid bilayer to indicate a structure that, when incorporated into a phospholipid, would result in a more fluid membrane with a lower melting point. Be sure to insert the fatty acids into the bilayer in the correct orientation. Not all the fatty acids will be used. 500000 Answer Bank 11 11

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter3: Cell Structure

Section: Chapter Questions

Problem 8SQ: In a lipid bilayer, the of all the lipid molecules are sandwiched between all of the __________. a....

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Which of the following statements are acceptable and why? [Whereas all the carbohydrate in the plasma membrane faces outward on the external surface of the cell, all the carbohydrate on internal membranes faces toward the cytosol.] [Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane.]
The cell membrane primarily consists of a collection of individual lipid molecules. Of the following three images, which one shows the correct orientation of these lipid molecules to form the cell membrane?
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.
Choose any two words in the table below, then connect them with a complete idea. Repeat this process three times in total. monomer disaccharide glucose cell wall energy structure glycosidic bond isomer cell-to-cell communication For example: if the two words are ribosome and protein, then you could write: Ribosomes are connected to proteins because the ribosomes are the protein builders in the cell. Ribosomes are made of two parts or subunits. The larger of the 2 parts is where the ribosome can add on an amino acid to the growing protein chain. Practice good Organization skills by reviewing concepts and vocabulary from the whole Activity to include full details. Choose your best idea and share it with your classmates. Join The Discussion
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.
Which of the following is used in the reaction called saponification? A. Strong Base B. Hydrogen C. Strong acid D. Nickel Fatty acids contain in __ - hydrogen bonds, making them __. The Phosphate "head" in a phospholipid is __. The entire phospholipid molecule, therefore, is __. A. Carbon; hydrophobic; hydrophilic; amphiphilic B. Hydrogen; hydrophilic; hydrophilic; amphiphilic C. Carbon; hydrophilic; hydrophilic; hydrophobic D. Hydrogen; hydrophobic; hydrophobic; hydrophobic
Which of the following describes how regions of phospholipids are arranged in the cell membrane? Hydrophobic fatty acid regions are positioned toward polar environments. Hydrophilic phosphate regions are positioned toward nonpolar environments. Hydrophilic phosphate regions face each other within the interior of the cell membrane. Hydrophobic fatty acid regions face each other within the interior of the cell membrane.
When viewed by electron microscopy, the lipid bilayer is often described as looking like a railroad track. Explain how the structure of the bilayer creates this image.
Which of the following statements about binding between cytosolic proteins and phospholipids is true? a. Phospholipids do not possess the appropriate features to bind to cytosolic proteins. b. Binding between cytosolic proteins and phospholipids is non-specific and does not require molecular complimentarity. c. The ability of a cytosolic protein and a phospholipid to bind can be changed by phosphrylation of the phospholipid. For example, different phosphoinositides bind to different cytosolic proteins. d. Phospohorylation of phosphoinositides occurs randomly, whereas protein phosphorylation is mediated by kinases and phosphotases. Please answer asap and type your answer and do not copy from anywhere please answer asap
Which of the following (could be more than one) would not be a rational explanation for why the three-dimensional structure of a protein is driven and stabilized largely by noncovalent rather than covalent bonds?a) Proteins may be degraded for energy, and if their three-dimensional structures were heldtogether by mostly covalent bonding, this might be too difficult to accomplishb) Proteins will need to be unfolded to cross biological membrane, and if their three-dimensionalstructures were held together by mostly covalent bonding, this might be too difficult toaccomplish.c) Protein function (transport, enzyme catalysis, etc...) may require flexibility in the three-dimensional structure to allow for conformational change, and if protein three-dimensionalstructure were held together by mostly covalent bonding, this might be too difficult toaccomplish.d) All of the answer choices are rational explanations for why the three-dimensional structure of protein is driven and stabilized largely…
Include a couple of paragraphs about Alkaline Phosphatase. Make sure you describe the following: a. Protein structure b. Cell location c. Reactions involved d. Functions in E. coli and humans
Identify and briefly describe (one sentence) the structural element(s) that allow for the 3 ways by which nutrients go in and out of the cell. a._______________________________________________________________ b._______________________________________________________________ c._______________________________________________________________ 2. Microorganisms can thrive under many different conditions, including high-temperature environments such as hot springs. To function properly, cell membranes have to be in a fluid state. How do you expect the fatty acid content (saturated versus unsaturated) of bacteria living in high-temperature environments might compare with that of bacteria living in more moderate temperatures?