Campbell Biology Chapter 7 Exam Questions With All Correct Answers latest updated (Graded A)

Campbell Biology Chapter 7 Exam Questions With All Correct Answers latest updated (Graded A) Fluid Mosaic Model - Answer- Different pieces. Lipids, proteins, and carbohydrates. Membrane is a ______ of protein molecules bobbing in a fluid bilayer of phospholipids. Bilayer - Answer- Integral Proteins - Answer- In the membrane. Are often transmembrane proteins. Lateral - Answer- Phospholipids have mostly ____ movement. Cytoskeleton - Answer- Most proteins are attached to the _____. Plasma Membrane - Answer- Boundary that separates living cell from nonliving surroundings. Controls traffic into and out of cell. Selective Permeability - Answer- Exchanging materials with the environment. Cells choose what can enter or leave the cell. Amphipathic - Answer- Contains both a hydrophilic portion and a hydrophobic portion. Hydrocarbon Tails - Answer- _____ ___ affect membrane fluidity. If they are bent, there is more room, so the membrane is more fluid. Cholesterol - Answer- Temperature buffer. It prevents the phospholipids from getting too far apart or moving too much. Decrease, Increase - Answer- Warm temperatures ____ fluidity, cool temperatures ____ fluidity. Transmembrane Proteins - Answer- Proteins that are both inside and outside the membrane with hydrophilic and hydrophobic portions. Peripheral Proteins - Answer- Proteins loosely bonded to the side of the membrane. Integrin - Answer- An integral protein that is also a transmembrane protein that transmits stimuli from the environment to inside the cell and vice versa. Transport Protein - Answer- Is also a channel protein that is also an integrin that is also an integral protein that is also a transmembrane protein. It can have a hydrophilic channel or can shuttle substances through shape changes. Allows passage for hydrophilic substances. Six Functions of Membrane Proteins - Answer- Transport, enzymatic activity, signal transduction, cell-cell recognition, intercellular joining, and attachment to the cytoskeleton and the extracellular matrix. Glycoproteins and Glycolipids - Answer- Cell-cell recognition uses _____ and ____. Inside, Outside - Answer- Molecules facing the ____ of the endoplasmic reticulum will face the ______ of the plasma membrane. Nonpolar Molecules - Answer- Are easily and rapidly transported across the hydrophobic core membrane. CO2 and O2. Polar Molecules and Ions - Answer- Cross the membrane slowly and with more difficulty. C6H12O6 and H2O. Equilibrium - Answer- Substances will move from high concentrations to low concentrations until _____ is reached, then move at equal rates. Concentration Gradient - Answer- Moving from more concentrated to less concentrated. Substances diffuse down this. Rate and Direction - Answer- Concentration gradient determines ___ of diffusion and ___ of diffusion. Osmosis - Answer- The diffusion of water across a semipermeable membrane. Water moves from where the solute is higher concentrated to where it is lower concentrated. Hypertonic - Answer- The solute is more concentrated outside of the cell, causing water to leave the cell. This can result in a shriveled cell. Plant cells could become plasmolyzed. Isotonic - Answer- The concentration of the solute is equal outside of the cell as inside the cell. Water moves in and out of the cell at equal rates. Plant cells would be described as flaccid.