1. Which of the following groupings describes the four principal components of t
ID: 275913 • Letter: 1
Question
1. Which of the following groupings describes the four principal components of the plasma membrane? a. b. c. d. Phospholipid bilayer, ribosomes, glycocalyx, proteins Phospholipid bilayer, proteins, cholesterol, glycocalyx Phospholipid bilayer, DNA, proteins, cholesterol Phospholipid bilayer, proteins, DNA, ribosomes 2. What molecule serves as the basic molecule of the bilayer of a membrane? a. carbohydrates b. phospholipids c. cholesterol d. integral proteins Which of the followin protein? 3. 8 statements correctly describes the difference between an integral and a peripheral integral protein associates with the cholesterol in the membrane, whereas a peripheral protein binds only to the glycocalyx. a. A An integral protein spans the hydrophobic membrane, whereas a peripheral protein associates more with one side of the membrane than with the other. b. A peripheral protein is found completely embedded in the interior of the membrane, whereas an integral protein is on the outside of the membrane. c. Because of the fatty acid chains that help make up the phospholipid bilayer, the only substances that can pass through the plasma membrane purely by means of diffusion are 4. a. b. c. d. lipids or polar molecules of any size small proteins lipids or very small polar molecules small carbohydrates 5. Which of the following items would more likely exist within the glycocalyx? a. Phospholipids b. Water c. Carbohydrates d. Cholesterol 6. The plasma membrane is considered a a. fluid material b. gelatinous material c. gas d. solid material 7. Which component of the plasma membrane allows cells to stick to surfaces? a. the glycocalyx b. transport protiens c. cholesterol d. the lipid bilayerExplanation / Answer
Page no. 1.
Ans. no. 1
The phospholipids layers form the plasma membrane. The membrane proteins are present in this phospholipid bilayer. Phospoholipids and cholestrol form the main components of the plasma membrane. Apart from this, proteins and glycocalyx are also important. Therefore, the correct answer is option (b).
2.
The phospholipids are the basic part of the plasma membrane. Cholestrol, proteins are components are also important, however, the phospholipid bilayer forms tha base of the plasma membrane. So, the correct answer is option (b).
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