Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Question
Chapter 2, Problem 27RQ
Summary Introduction
To review:
The reason behind using the term “crowded” and not “concentrated” for describing the densely packed molecules, which are present in the interior of the living cells.
Introduction:
The internal space within the cells is crowded. This phenomenon is called macromolecular crowding. It changes the properties of molecules that are present in a solution. This affects the behavior of molecules.
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The fatty acid tails in the plasma membrane are ______________ which means they are _______________.
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Chapter 2 Solutions
Biochemistry: The Molecular Basis of Life
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- Three proteins that facilitate the movement of phospholipidmolecules across a membrane are flippase, floppase, and_________________________.arrow_forward_____________ are molecules used in enzyme studies that resemble the structure of a substrate’s transition state.arrow_forwardDiffusion occurs because of the ________________________ of molecules.arrow_forward
- Transport of a substance across membranes that requires no direct input of energy is referred to as _____________ transport.arrow_forwardWhen phospholipids are added to an aqueous environment (consisting mostly of water) the phospholipid molecules will spontaneously assemble into a phospholipid bilayer where the layers are held together by weak attractive forces between molecules. These structures are often seen in nature as cell and organelle membranes. _____________________________________________________________________________ 3. Which movement is more likely within a membrane, lateral movement or transverse (ie. flip-flop)? Why? 4. Which forces hold the phospholipid bilayer together?arrow_forwardSaturated fatty acids have _____________ double bonds.arrow_forward
- SAM is a donor of _____________ groups in the synthesis of some phospholipid molecules.arrow_forwardMultisubunit proteins in which some or all of the subunitsare identical are referred to as _______________________.arrow_forwardThe antifungal drug nystatin kills fungal cells in part through formation of membrane pores that cause K+ leakage. To what class of membrane-inserting molecules does nystatin belong?arrow_forward
- The two types of membrane proteins are peripheral and _____________.arrow_forward_________________ is the general term for molecules that enzymes modify to produce reaction products.arrow_forward_____________ is a series of reactions in which a specific biomolecule is converted into a product molecule.arrow_forward
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