Membranes with unsaturated fatty acids in their components are more flexible and fluid because: Unsaturated fatty acids pack closely together to form ordered arrays. Saturated fatty acids have a "kink" that produces more fluid aggregates. Unsaturated fatty acids have cis double bonds that prevent formation of the "kink." Unsaturated fatty acids bend at the double

Membranes with unsaturated fatty acids in their components are more flexible and fluid because: Unsaturated fatty acids pack closely together to form ordered arrays. Saturated fatty acids have a "kink" that produces more fluid aggregates. Unsaturated fatty acids have cis double bonds that prevent formation of the "kink." Unsaturated fatty acids bend at the double

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 6SQ: Cell membranes consist mainly of ________ and ________. a. lipids; carbohydrates b. phospholipids;...

See similar textbooks

Similar questions

A higher cholesterol content in cell membranes increases membrane fluidity at low temperatures because: Group of answer choices cholesterol's fused ring structure prevents close packing of long-chain fatty acids in adjacent lipids. cholesterol's polar head group can form extensive interactions with water molecules. cholesterol increases hydrogen bonding between long-chain fatty acids in adjacent lipids. cholesterol's fused ring structure is highly flexible.
Which of the following correctly describes how high levels of fatty acid structures contribute to the rigidity of the cell membrane? The cell membrane becomes more rigid as the amount of unsaturated fatty acids with a kinked structure increases. The cell membrane becomes more rigid as the amount of unsaturated fatty acids with a kinked structure increases. The cell membrane becomes more rigid as the amount of saturated fatty acids with a straight structure increases. The cell membrane becomes more rigid as the amount of saturated fatty acids with a straight structure increases. The cell membrane becomes less rigid as the amount of unsaturated fatty acids with a straight structure increases. , , The cell membrane becomes less rigid as the amount of unsaturated fatty acids with a straight structure increases. , , The cell membrane becomes less rigid as the amount of saturated fatty acids with a straight structure increases.
Which of the following is a true statement? Sphingolipids contain 2 hydrophobic, acyl chains Phospholipids contain 3 hydrophobic acyl chains Sphingolipids are completely no-polar, hydrophobic molecules The different types of phospholipids do not have different physical properties when in the membrane
A fatty acid with one or more double bonds between carbon atoms: is unsaturated. has the maximum number of hydrogen atoms possible bonded to the carbon chain. is saturated. is saturated and has the maximum number of hydrogen atoms possible bonded to the carbon chain. is unsaturated and has the maximum number of hydrogen atoms possible bonded to the carbon chain.
Draw a lipid bilayer containing any or all of the fatty acids in number one with the presence of Cholesterol and membrane proteins. Your lipid bilayer must contain at least 20 lipid units (including Cholesterol).
Which of the following functions is NOT or cannot be performed by lipids? They can bind to DNA response elements to control gene expression. They can serve as chemical messengers. They can help in the selective permeability of membranes. They can form pores for the thermodynamically favored passage of ions across membranes.
A membrane consists of 50% protein by weight and 50% phosphoglycerides by weight. The average molecular weight of the lipids is 800 Da, and the average molecular weight of the proteins is 50,000 Da. Calculate the molar ratio of lipid to protein.
Which of the following statements is true of fatty acids? Group of answer choices The more carbon atoms and nitrogen atoms present in a fatty acid, the shorter the fatty acid is. The more hydrogen atoms attached to carbon atoms, the more saturated a fatty acid is. All fatty acids are solid at room temperature. All fatty acids have only double bonds. All fatty acids have the same chain length.
Fatty acids are esterified into mono-, di-, or triglycerides by attaching to: Sterol Cholesterol Glycerol Sodium chloride Omega-3 fatty acids have which of the following? At least 3 double bonds A 3-carbon backbone A double bond 3 carbons from the end of the chain At least 3 fatty acid molecules linked by omega bonds
Which of the following lipids are not found in animal membranes? (a) Phosphoglycerides (b) Cholesterol (c) Triacylglycerols (d) Glycolipids (e) Sphingolipids
Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to decrease that membrane’s fluidity? A. linolenic acid, with 18 carbons and three carbon-to-carbon double bonds B. linoleic acid, with 18 carbons and two carbon-to-carbon double bonds C. oleic acid, with 18 carbons and one carbon-to-carbon double bond D. stearic acid, with 18 carbons and no carbon-to-carbon double bonds E. all of the above molecules are saturated, and equally likely to decrease membrane fluidity
Lipid molecules do not dissolve in water because all lipids are _______. Instead, lipid molecules attract other lipid molecules, forming tight clumps. When lipid molecules are stuck to a surface (such as hands or clothing), the lipid molecules stick to each other and the surface, and water will not wash them away. Fill in the blank: A. hydrophobic B. polypeptides C. acidic