Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 6, Problem 7TYU
In terms of structure, how do channel proteins differ from carrier proteins?
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Describe the difference between carrier proteins and channel proteins. What is required for the passive transport of molecules through these membrane proteins?
List two ways that channels differ from transporters? What type of molecules do channels usually transport?
Multi-adhesive matrix proteins form adhesive bridges between what type of components or structures? Give an example of such an ECM protein?
Chapter 6 Solutions
Biological Science (7th Edition)
Ch. 6 - 1. How do the phospholipids in archaea differ from...Ch. 6 - If a solution surrounding a cell is hypertonic...Ch. 6 - Prob. 3TYKCh. 6 - 4. Integral membrane proteins are anchored in...Ch. 6 - 5. Cooking oil lipids consist of long, unsaturated...Ch. 6 - Prob. 6TYUCh. 6 - 7. In terms of structure, how do channel proteins...Ch. 6 - 9. PROCESS OF SCIENCE In an experiment, you create...Ch. 6 - Prob. 11PIATCh. 6 - Prob. 12PIAT
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- Discuss the following statement: “The differences between a channel and a transporter are like the differences between a bridge and a ferry.”arrow_forwardWhere on a membrane would you find peripheral proteins? List at least 3 of the functions of peripheral proteins.arrow_forwardWhat are the three types of channel proteins, and whatsignal causes each to open or close?arrow_forward
- The three fundamental classes of proteins involved in transport across membranes are: i) channelsii) pumpsiii) exchangers For each class, describe its essential features, explain how transport is accomplished and name at least one representative example.arrow_forward(a) Describe permeability of a phospholipid bilayer for the following molecules. Use terms: non-permeable, high permeability, medium permeability. N2, O2, Na+, glucose, sucrose (disaccharide), glycogen, H2O, KCl, K+, Mg2+, glycine and protein (b) Discuss the role of carbonic anhydrase in CO2 transport. (c) Discuss the cause of ‘cold denaturation’ of proteins.arrow_forwardThe transmembrane segments of most integral membrane proteins are made of alpha -helical secondary structures. What is the advantage of this conformation ? How do multiple alpha-helices arrange themselves to form the aqueous pore of an ion channel ?arrow_forward
- What are the types of transmembrane proteins that allow for the movement of substances across biological membranes?arrow_forwardWhat TWO factors help to maintain integral transmembrane proteins securely fixed inside the lipid bilayer?arrow_forwardHow are the ER and Golgi involved in membrane creation? (Think about lipid synthesis and distribution). What are the characteristics of Sphingolipid and cholesterol in the membrane? What does it do to the membrane? Explain raft formation.arrow_forward
- While endocytosis and exocytosis refer to the direction in which a vesicle moves into and out of a cell respectively, it is important to think about what is being moved with and within the vesicles. To demonstrate how this process is utilized in human cells we will focus on the human body's insulin response. The purpose of the insulin response is to create a pathway for glucose entry into cells by releasing glucose transporters into the membrane. Cell Type #1- insulin producers: In humans, pancreatic B-cells create steroid insulin that can be packaged into vesicles starting at the ER. These vesicles are prepared for exocytosis so that the insulin can be released from the pancreatic B - cells and get into the bloodstream when signaled to do so. When glucose is present in the blood stream these cells will release the pre-packed insulin into the blood stream. Cell Type #2- insulin responders: Other cells do not produce insulin but instead respond when they have received the insulin signal…arrow_forwardWhat is the structure of the translocation channel that allows transfer of proteins across the membrane bilayer? In particular, is the channel so narrow that proteins can pass through only in an unfolded state, or will it accommodate folded protein domains?arrow_forwardWhich portion of the phosphatidylinositol molecule contributes to (a) fluidity of the bilayer and (b) the surface polarity of the bilayer?arrow_forward
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