Podcast
Questions and Answers
What is a common feature of membranes according to the text?
What is a common feature of membranes according to the text?
- Composed mainly of carbohydrates
- Consist mainly of nucleic acids
- Contain proteins embedded in lipid bilayers (correct)
- Lack fluidity and are rigid structures
Which of the following is true about phospholipids?
Which of the following is true about phospholipids?
- Consist of only proteins
- Composed of one or more fatty acids (correct)
- Always symmetric structures
- Do not have distinct functions
What makes phosphatidate the simplest phosphoglyceride?
What makes phosphatidate the simplest phosphoglyceride?
- Derived from glycerol (correct)
- Contains a high amount of nucleic acids
- It lacks an alcohol moiety
- It has no ester bonds
What is a distinguishing feature of phospholipids?
What is a distinguishing feature of phospholipids?
Which statement is true regarding membrane fluidity?
Which statement is true regarding membrane fluidity?
What is a characteristic of glycolipids in membranes?
What is a characteristic of glycolipids in membranes?
What type of lipid contains a sphingosine backbone with one or more sugars attached to the primary –OH group?
What type of lipid contains a sphingosine backbone with one or more sugars attached to the primary –OH group?
Which lipid is built from four linked hydrocarbon rings and contains an –OH group at one end?
Which lipid is built from four linked hydrocarbon rings and contains an –OH group at one end?
What type of linkage joins nonpolar chains to glycerol in archaeal membranes?
What type of linkage joins nonpolar chains to glycerol in archaeal membranes?
What is the stereochemistry of the central glycerol in archaeal membranes?
What is the stereochemistry of the central glycerol in archaeal membranes?
Which type of molecules contain both a hydrophobic and a hydrophilic moiety?
Which type of molecules contain both a hydrophobic and a hydrophilic moiety?
In which structure are sugar residues always found on the extracellular side of the membrane?
In which structure are sugar residues always found on the extracellular side of the membrane?
What is the structure of a lipid bilayer?
What is the structure of a lipid bilayer?
What stabilizes the formation of lipid bilayers in aqueous solutions?
What stabilizes the formation of lipid bilayers in aqueous solutions?
Which characteristic of phospholipids and glycolipids prevents them from forming small micelles?
Which characteristic of phospholipids and glycolipids prevents them from forming small micelles?
What is the consequence of the amphipathic nature of membrane lipids?
What is the consequence of the amphipathic nature of membrane lipids?
What is the role of cholesterol in lipid bilayers?
What is the role of cholesterol in lipid bilayers?
How do archaeal membranes differ from eukaryotic membranes in terms of lipid composition?
How do archaeal membranes differ from eukaryotic membranes in terms of lipid composition?
