Guided Reading Chapter 5 Now that we have learned about the various molecules and organelles that compose the cell we can talk about how the cell actually works Organelles rely on various molecules to carry out cellular function In chapter five we apply what we learned in chapters three and four as we discover the working cell 1 The contents of the cell are separated from the environment by the plasma membrane Why is the plasma membrane considered a fluid mosaic 2 Define and describe the six major functions carried out by membrane proteins 3 Why do the hydrophobic tails of phospholipids face inward while the hydrophilic heads face outward 4 Molecules have to move into and out of cells Water is a major component of the cell How does water move into the cell Does the movement of water require energy 5 Under what circumstances is an animal cell at equilibrium 6 Explain how the solute concentration on the outside of a plant cell relates to the solute concentration on the inside of a turgid cell 7 Differentiate between a hypotonic hypertonic and an isotonic solution 8 Compare and contrast passive active and facilitated transport 9 How do bulky molecules and proteins move into and out of the cell 10 In chapter 3 we learned about the construction of polymers from monomers Would this be an endergonic or and exergonic reaction Why 11 The potential energy in the chemical bonds of molecules like ATP can be used to build polymers and do work in the cell What is ATP a How is ATP used to drive the transport of solutes across a membrane The transport of an organelle across the cell The synthesis of a molecule 12 There is a chemical barrier that must be overcome for a reaction to occur What is this called 13 How does an enzyme lower the activation energy needed for a reaction to begin 14 How does a competitive inhibitor work A noncompetitive inhibitor
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