15 Questions
How are the lipids arranged within the cell membrane?
Polar head towards the outer sides
What major lipids make up the cell membrane?
Phospholipids
What component ensures that the nonpolar tail of saturated hydrocarbons is protected from the aqueous environment?
Phospholipids
What additional component besides phospholipids is found in the cell membrane?
Proteins
What is the approximate percentage composition of proteins in the erythrocyte membrane?
52%
How can membrane proteins be classified based on ease of extraction?
Integral and peripheral
Which organelle was instrumental in studying the detailed structure of the cell membrane?
Electron microscope
What divides the intracellular space into luminal and extra luminal compartments?
Endoplasmic reticulum
Which organelle often shows ribosomes attached to its outer surface?
Endoplasmic reticulum
What type of endoplasmic reticulum is frequently observed in cells actively involved in protein synthesis and secretion?
Rough endoplasmic reticulum (RER)
Which organelles are NOT considered part of the endomembrane system due to their functions not being coordinated with other components?
Mitochondria, chloroplast, and peroxisomes
Which organelle is the major site for synthesis of steroidal hormones?
Smooth endoplasmic reticulum (SER)
In what cells is the rough endoplasmic reticulum (RER) frequently observed?
Cells actively involved in protein synthesis and secretion
What is the function of smooth endoplasmic reticulum (SER) in animal cells?
Lipid synthesis
What distinguishes smooth endoplasmic reticulum (SER) from rough endoplasmic reticulum (RER)?
Presence of ribosomes on surface
Explore the detailed structure and functions of the cell membrane, focusing on lipids and proteins. Learn about the advancements in studying cell membranes and the role of electron microscopes in understanding cell organelles.
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