BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 4.1, Problem 1CS
Core Skill: Connections Look back at Figure 3.11. What is the physical/chemical reason why phospholipids tend to form a bilayer?
Figure 3.11 Structure of phospholipids, (a) Chemical structure and space-filling model of phosphatidylcholine, a common phospholipid found in living organisms. Phospholipids contain both polar and nonpolar regions, making them amphipathic. The fatty-acid tails are nonpolar. The rest of the molecule is polar, (b) Arrangement of phospholipids in a biological membrane, such as the plasma membrane that encloses cells. The polar regions of the phospholipids face the watery environment, whereas the nonpolar regions associate with each other in the interior of the membrane, forming a bilayer.
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Cell Membrane and Cell Transport WebQuest
Part I: Cell Membranes
Go to the following website: www.biology4kids.com/ files/cell_membrane.html
1. How is the cell membrane similar to a plastic bag with tiny holes?
2. What two components make up the cell membrane?
a. What are their functions?
3. What is the fluid mosaic model?
4. Sketch a section of the cell membrane, showing both phospholipids and proteins.
Label your drawing.
5. Label the diagram of the phospholipid molecule below with the following terms:
hydrophilic head, hydrophobic tail
This diagram
shows a
Head
simplified
version of a
phospholipid
molecule.
Tails
Answer and draw what is given in the question NEATLY
Give typed full explanation
Chapter 4 Solutions
BIOLOGY
Ch. 4.1 - What properties of deep-sea vents made them...Ch. 4.1 - Which protobiont seems most similar to todays...Ch. 4.1 - Core Skill: Connections Look back at Figure 3.11....Ch. 4.1 - Prob. 3CCCh. 4.2 - Prob. 1CCCh. 4.2 - Prob. 2CCCh. 4.3 - Prob. 1CSCh. 4.3 - Prob. 1CCCh. 4.3 - Prob. 2CSCh. 4.4 - Prob. 1CS
Ch. 4.4 - Describe the type of movements that occur between...Ch. 4.4 - Prob. 2CSCh. 4.5 - Prob. 1CCCh. 4.5 - Prob. 1CSCh. 4.5 - If we consider the Golgi apparatus as three...Ch. 4.5 - The Nucleus and Endomembrane System Experimental...Ch. 4.5 - Prob. 2EQCh. 4.5 - Prob. 3EQCh. 4.5 - Prob. 3CCCh. 4.6 - Prob. 1CCCh. 4.6 - Core Skill: Connections Look ahead to Figure...Ch. 4.7 - Prob. 1CCCh. 4.7 - Prob. 2CCCh. 4 - The cell theory states that a. all living things...Ch. 4 - Prob. 2TYCh. 4 - Prob. 3TYCh. 4 - Prob. 4TYCh. 4 - Each of the following is part of the endomembrane...Ch. 4 - Prob. 6TYCh. 4 - Functions of the smooth endoplasmic reticulum...Ch. 4 - Prob. 8TYCh. 4 - Prob. 9TYCh. 4 - Which of the following observations would not be...Ch. 4 - What are the four stages that led to the origin of...Ch. 4 - Explain how motor proteins and cytoskeletal...Ch. 4 - Prob. 3CQCh. 4 - Discuss the roles of the genome and proteome in...Ch. 4 - Prob. 2COQ
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- Give typing answer with explanation and conclusion 6. Which chemical properties of phospholipids make them suited to the task of forming cell membranes? Could carbohydrates be used to replace phospholipids as the main component of cell membranes? Explain. Incorporate the following terms into your answer: hydrophobic; hydrophilic; semipermeable.arrow_forwardTAGS: Biology, Chemistry, Biochemistry, Cell Biology, Molecular Biology A group of researchers were tasked to design various synthetic cell membranes that could be used to simulatecellular activities of different organisms. Help the researchers assemble the structure of the major lipid component for a cell membrane (draw the strucutres clearly) that is appropriate for the following and briefly explain your answer: a prokaryotic cell thriving in a geyser at the Yellowstone National Park in Wyoming, USA a muscle cell of a salmon fry in the Arctic Ocean a frog neurocyte Chemical structures of the compounds that are available are shown on the image.arrow_forwardWhat's New Identify the different components of the cell membrane using the deacription given below. Use the appropriate number to locate each molecule. 1. Carbohydrate chain - 2 or more monosaccharide unit, either attached or branched found on the outside surface of the cell membrane. 2. Cholesterol found between the hydrophobic tails of the membrane phospholipid. 3. Glycolipid - carbohydrates attached to a lipid molecule. 4. Glycoprotein - carbohydrates attached to a protein molecule. 5. Integral Protein – protein embedded in the phospholipid bilayer that extend in both layers of the membrane. 6. Lipid Tail – the hydrophobic tail of the phospholipid facing the core of the membrane. 7. Peripheral Protein - protein found in the inner or outer surface of the membrane but not embedded on hydrophobic core. 8. Phosphate Head - globular hydrophilic head of the membrane.arrow_forward
- Select all answers that applyarrow_forwardMolecular Transport Across Membranes Workshop How does the cell membrane control movement of materials? The cellular membrane is critical to the maintenance of homeostasis in living organisms. The cell membrane separates the cell from the external environment and plays a critical role in regulating movement of material in and out of the cell. Additionally, eukaryotic cells are made complex by the presence of internal membranes that form organelles, so the cells may become specialized. These organelle membranes create compartments within the cell that can do specific functions. For this exercise, you will work in groups of four to progress through the activities. At the end of each activity, one group (chosen at random) will share how they responded and open the floor for further discussion. Model 1 - Types of Ions and Molecules in a Cell Type 4 Molecules Molecular oxygen (O,): Туре 1 Ions Type 2 Molecules Туре 3 Molecules Glucose: Water: Potassium: K* OH 0=0 D Sodium: Na+ + O- Urea:…arrow_forwardQuestion:- Given the very complex lipid composition of cell membranes, what variations exist within the different membranes of organelles in an animal cell? What are the functional consequences of these differences?arrow_forward
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