Lipids are common components of membranes and cell walls. What is thestructural motif of membranes?13A) lipid bilayerB) micelleC) hydrophobic tailsD) unsaturated triglyceridesE) steroidal packing

Lipids are biomolecules that do not have a fixed chemical structure like carbohydrates or amino…

Answered: Lipids are common components of…

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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Lipids are a class of macromolecules that can be found in which of the following places? a) lipids can be found in all of these places b) in hormones such as testosterone c) in the plasma membrane of cells d) surround organs
Carbons is used in cells for a) forming the charge across the membrane by serving a positive cations b) as the structural backbone of most molecules c) forming the second most common element D) none of these
1. Indicates whether the statement is true (T) or false (F). If the statement is wrong, rephrase it so that it is true. a) Glycogen is a lipid b) Passive transport moves substances against a concentration gradient. c) Starch is a disaccharide. d) Facilitated diffusion is an example of passive transport.
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
Peptide bonds cannot rotate. This is because: a) the amino acid side chains are too bulky to allow this. B) Internal hydrogen bonding hinders rotation. C) interaction with water molecules hinders rotation D) the peptide bond has considerable double bond character Polypeptide chains prefer the trans conformation. This is because: a) This distances hydrophilic groups from hydrophobic groups b) this minimizes crowding of side chains c) This brings hydrophilic groups in contact with water molecules d) This allows proteins to fold more easily Ramachandran plots indicate that protein conformation is largely a function of: a) hydrophobicity b) number of amino acids c) torsion angles d) arrangement of prosthetic groups
Collagen is a a) carbohydrate b) protein d) fat. O c) polysaccharide
Which of the following membranes contain low cholesterol and high cardiolipin?a) Myelin sheathb) Plasma membranec) Inner mitochondrial membrane of hepatocyted) Cell wall
The movement of water along a concentration gradient through a semi-permeable membrane: A) osmosis B) endocytosis C) diffusion D) active transport Question 4 Which bonds are created when the primary structure of a protein forms? OA) peptide bonds B) ionic bonds C) glycosidic bonds D) hydrogen bonds
Glycoproteins: a) Briefly describe the structure and function of EPO. Provide its full name b) What are lectins?
Which of the following properties of a free fatty acid molecule would make it capable of producing the most energy when used as a fuel source, compared to other free fatty acids? a) A large number of unsaturated bonds b) Shorter hydrocarbon chain with a large number of carbonyl groups c) Longer hydrocarbon chain with a large number of saturated bonds d) Shorter hydrocarbon chain with a large number of saturated bonds
1. Which one of the following is NOT an important functional group or linkage in biomolecules? A) Phosphodiester B) Hemiketal C) Thiol D) Lipid E) Phosphoanhydride
b) The likelihood of both triglycerides and phospholipids to behave as liquids at a given temperature is affected by their degree of saturation. Explain what saturation is and provide a biochemical explanation for why it affects the likelihood of a lipid to behave as a liquid at a given temperature. 5) a) Proteins have multiple "levels" of structural complexity. Match the type of chemical bond on the left with the level of protein structure that they are specifically involved in maintaining on the right. (Note that more than one letter may apply to each structural level and that each letter may be used more than once or not at all). a. disulphide bonds Tertiary structure b. hydrogen bonds Primary structure c. ionic bonds Quaternary structure d. peptide bonds Secondary structure

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Lipids are common components of membranes and cell walls. What is the structural motif of membranes? D A) lipid bilayer B) micelle C) hydrophobic tails D) unsaturated triglycerides E) steroidal packing