Podcast
Questions and Answers
Which of the following is NOT a feature of all biological membranes?
Which of the following is NOT a feature of all biological membranes?
- Flexibility
- Ability to change composition (correct)
- Ability to change shape without losing integrity or becoming leaky
- Ability to flow
What is the role of cholesterol in the cell membrane?
What is the role of cholesterol in the cell membrane?
- To act as a 'fluidity buffer' (correct)
- To decrease membrane fluidity
- To prevent the formation of vesicles
- To increase membrane rigidity
What is the function of the extracellular matrix in cell physiology?
What is the function of the extracellular matrix in cell physiology?
- To regulate membrane fluidity
- To transport molecules across the membrane
- To facilitate vesicle formation
- To provide structural support (correct)
What determines the structure and flexibility of the lipid bilayer?
What determines the structure and flexibility of the lipid bilayer?
What are vesicles?
What are vesicles?
What was the result of the first demonstrations of lipid molecule diffusion within lipid bilayers?
What was the result of the first demonstrations of lipid molecule diffusion within lipid bilayers?
Which type of membranes are commonly used as model membranes in experimental studies?
Which type of membranes are commonly used as model membranes in experimental studies?
What is the purpose of using black membranes?
What is the purpose of using black membranes?
What is the process called when phospholipids move from one leaflet of the lipid bilayer to the other?
What is the process called when phospholipids move from one leaflet of the lipid bilayer to the other?
Which type of proteins catalyze the flip-flop movement of phospholipids?
Which type of proteins catalyze the flip-flop movement of phospholipids?
What is the main factor that determines the fluidity of a lipid bilayer?
What is the main factor that determines the fluidity of a lipid bilayer?
How is the lipid bilayer stabilized?
How is the lipid bilayer stabilized?
Which protein gives tissues their elasticity, such as skin, blood vessels, and lungs?
Which protein gives tissues their elasticity, such as skin, blood vessels, and lungs?
Which protein is a multifunctional adhesive glycoprotein that plays a role in tissue repair, cell attachment, and motility?
Which protein is a multifunctional adhesive glycoprotein that plays a role in tissue repair, cell attachment, and motility?
Which protein is the primary organizer of the sheet structure of the basal lamina?
Which protein is the primary organizer of the sheet structure of the basal lamina?
Which type of proteins facilitate cell adhesion and mediate cellular signals in various types of cells?
Which type of proteins facilitate cell adhesion and mediate cellular signals in various types of cells?
How many distinct genes in the human genome code for different collagen chains?
How many distinct genes in the human genome code for different collagen chains?
Which component of all epithelia is thin, flexible, and tough?
Which component of all epithelia is thin, flexible, and tough?
Which state is the lipid bilayer in at low temperatures?
Which state is the lipid bilayer in at low temperatures?
What effect do unsaturated fatty acids have on the melting point of the lipid bilayer?
What effect do unsaturated fatty acids have on the melting point of the lipid bilayer?
What effect does a shorter hydrocarbon chain in membrane phospholipids have on the fluidity of the membrane?
What effect does a shorter hydrocarbon chain in membrane phospholipids have on the fluidity of the membrane?
What is the role of cholesterol in the plasma membrane?
What is the role of cholesterol in the plasma membrane?
What effect does an increase in saturated fatty acids content have on the melting point of the lipid bilayer?
What effect does an increase in saturated fatty acids content have on the melting point of the lipid bilayer?
What effect does an increase in unsaturated fatty acids content have on the melting point of the lipid bilayer?
What effect does an increase in unsaturated fatty acids content have on the melting point of the lipid bilayer?
Proteoglycans are formed by the combination of glycosaminoglycans (GAGs) and what other component?
Proteoglycans are formed by the combination of glycosaminoglycans (GAGs) and what other component?
Which type of tissue has collagen fibers and bone mineral in its extracellular matrix?
Which type of tissue has collagen fibers and bone mineral in its extracellular matrix?
Which cells produce and secrete the extracellular matrix in connective tissue?
Which cells produce and secrete the extracellular matrix in connective tissue?
What is the main function of the extracellular matrix in biology?
What is the main function of the extracellular matrix in biology?
Where are basement membranes/basal lamina found in animal tissues?
Where are basement membranes/basal lamina found in animal tissues?
What are the major classes of macromolecules found in the extracellular matrix?
What are the major classes of macromolecules found in the extracellular matrix?
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