30 Questions
Which of the following is NOT a lipid component of the cell membrane?
Proteins
Which of the following is NOT a function of the plasma membrane?
Energy production
Which of the following is NOT a type of transport across the plasma membrane?
Endocytosis
Which of the following is NOT a feature of the cytoskeleton?
Golgi apparatus
Which of the following is NOT a function of cell membranes?
Energy production
Which protein monomers form dimers in microtubules?
Tubulin
What is the process by which G-actin hydrolyzes ATP to ADP in F-actin?
Hydrolysis
What is the function of capping proteins in the stability of F-actin?
Prevent disassembly
Which cellular structure is composed of a tubulin triplet structure?
Centriole
What is the process by which beta monomers cleave GTP to GDP + Pi in microtubules?
Hydrolysis
Which type of filament is responsible for the shape of microvilli in an epithelial cell?
Actin filaments
Which protein is responsible for the movement of cilia and flagella along microtubules?
Dynein
Which type of filament is commonly found in muscle cells and some epithelial cells?
Intermediate filaments
Which type of filament confers stability and structure to many mesenchymal cells?
Intermediate filaments
Which type of filament is involved in cellular movement and cell division?
Microtubules
Which of the following lipid components usually has an unbranched structure and may or may not be saturated?
Fatty acid "tail"
What is the most common molecule that the "R" of the phosphate "head" is linked to?
Choline
What impact does a smaller amount of cholesterol have on membrane fluidity?
Stiffens the membrane
Which type of lipid has a different structure with a "backbone" consisting of sphingosine instead of glycerol?
Sphingolipid
Which of the following is NOT a function of the glycocalyx?
Contribution to the glycocalyx
Which of the following is the correct function of membrane proteins?
Signaling
What is the purpose of tight junctions?
Regulate movement across membranes
Which cytoskeletal structure is responsible for trafficking of organelles and cell division?
Microtubules
What is the function of adherens junctions?
Connect cells to the cytoskeleton
What is the overall function of the cytoskeleton?
All of the above
Which of the following best describes osmosis?
The diffusion of water through a semi-permeable membrane
What happens when sugar is added to the right side of the U-tube model?
The solution does not overflow on the right side
What is the role of the Na+/K+ ATPase in the plasma membrane?
It establishes a gradient of sodium and potassium across the membrane
Which type of transport requires ATP?
Active transport
Why is the membrane surrounding each organelle important to the cell?
It allows for compartmentalization of cellular processes
Test your knowledge on the plasma membrane and cellular signaling! Learn about how cells respond to extracellular signals, including growth factors and hormones. Explore the role of high-affinity protein receptors on the cell membrane in propagating signals into the cytosol.
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