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Questions and Answers
What is the main function of the plasma membrane?
What is the main function of the plasma membrane?
- To maintain the essential differences between the cytosol and the extracellular environment (correct)
- To synthesize proteins for the cell
- To produce energy for the cell
- To store genetic material
What provides the basic fluid structure of biological membranes?
What provides the basic fluid structure of biological membranes?
- Lipid bilayer (correct)
- Mitochondria
- Ribosomes
- Cytoskeleton
What do most membrane proteins do?
What do most membrane proteins do?
- Span the lipid bilayer and mediate various functions of the membrane (correct)
- Store energy in the form of ATP
- Produce enzymes for cellular reactions
- Facilitate cell division
What is the approximate thickness of the lipid bilayer in biological membranes?
What is the approximate thickness of the lipid bilayer in biological membranes?
Which organelles maintain characteristic differences within eukaryotic cells?
Which organelles maintain characteristic differences within eukaryotic cells?
What is the role of membrane proteins in biological membranes?
What is the role of membrane proteins in biological membranes?
What is the primary factor responsible for the bilayer structure of the lipid molecules in cell membranes?
What is the primary factor responsible for the bilayer structure of the lipid molecules in cell membranes?
Which of the following represents a common characteristic of all lipid molecules in cell membranes?
Which of the following represents a common characteristic of all lipid molecules in cell membranes?
Which of the following is a common feature of phospholipids in most animal cell membranes?
Which of the following is a common feature of phospholipids in most animal cell membranes?
How do differences in the length and saturation of the fatty acid tails influence phospholipid molecules in cell membranes?
How do differences in the length and saturation of the fatty acid tails influence phospholipid molecules in cell membranes?
What is the main difference between phosphoglycerides and sphingolipids?
What is the main difference between phosphoglycerides and sphingolipids?
What makes phosphatidylserine a special phosphoglyceride?
What makes phosphatidylserine a special phosphoglyceride?
What is attached to the terminal hydroxyl group of sphingomyelin?
What is attached to the terminal hydroxyl group of sphingomyelin?
What is the primary role of transmembrane proteins in the plasma membrane?
What is the primary role of transmembrane proteins in the plasma membrane?
What constitutes about 50% of the mass of most animal cell membranes?
What constitutes about 50% of the mass of most animal cell membranes?
What is a common characteristic of lipid molecules in cell membranes?
What is a common characteristic of lipid molecules in cell membranes?
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