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Suggested Problems for Chapter 11: Membrane Biology, Study notes of Biology

A list of matching and multiple choice questions related to membrane biology, including the structure and function of lipid bilayers, membrane proteins, and membrane transport. Students can use these questions to test their understanding of the concepts covered in the chapter.

Typology: Study notes

2011/2012

Uploaded on 04/02/2012

yesperez2729
yesperez2729 🇺🇸

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Download Suggested Problems for Chapter 11: Membrane Biology and more Study notes Biology in PDF only on Docsity! Suggested Problems for Chapter 11 MATCHING Choose the correct answer from the list below. Not all of the answers will be used. 1 Lipid biolayers spontaneously form ____________. Ans: closed biomolecular sheets Section: introduction 2 The driving force for the formation of membrane bilayers Ans: Hydrophobic effect Section: 11.1 3 ________ has a high permeability through lipid bilayers. Ans: Water Section: 11.1 4 ____________ is a protein only removed from a membrane with detergents. Ans: Peripheral Section: 11.2 5 ____________ This substance inhibits prostaglandin H2 synthase-1 by blocking the channel through which the substrate, arachidonate, travels. Ans: Asprin Section: 11.2 6 Cells maintain a __________ concentration of intracellular potassium as compared to the extracellular concentration. Ans: high Section: 11.5 7 ____________ The type of amino acid found in the transmembrane helix of an integral protein. Ans: hydrophobic Section: 11.3 8 ____________ This is the process by which lipids and proteins move in the membrane bilayer. Ans: lateral diffusion Section: 11.3 9 ____________ These membrane components contain carbohydrates. Ans: glycolipids Section: 11.2 10 ____________ This is a complex between cholesterol and membrane phospholipids. Ans: lipid raft Section: 11.4 Multiple Choice Questions 11 The type of transport which relies on the driving energy of a gradient __________ . A) Active B) Facilitated C) Passive D) Pumped E) ATP-mediated Ans: Section: 11.5 12 Which of the following is true? A) Membranes are lipid bilayers. B) Membrane lipids have both hydrophobic and hydrophilic properties. C) Many membranes are electrically polarized. D) All of the above. E) None of the above. Ans: Section: Introduction 13 How many molecules thick are membranes? A) two B) one C) infinite D) varying thickness, depending on structure E) None of the above. Ans: Section: Introduction 14 Which of the following membranes would be the most fluid? A) a bilayer made of lipids with polyunsaturated 18 carbon-fatty acids B) a bilayer made of lipids with saturated 18 carbon-fatty acids C) a bilayer made of lipids with saturated 16 carbon-fatty acids D) a bilayer made of lipids with polyunsaturated 16 carbon-fatty acids E) All of the above are equivalent in fluidity. Ans: Section: 11.1 15 Which of the following statements is consistent with the structure of biological membranes? A) All membrane proteins are integral and associate with the hydrophobic region of the membrane. B) Both proteins and lipids readily undergo transverse (“flip-flop”) diffusion from the inside to the outside of the membrane.
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