Cellular Signaling Quiz

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Which of the following is NOT a lipid component of the cell membrane?

Cholesterol

Phospholipids

Proteins (correct)

Sphingolipids

Which of the following is NOT a function of the plasma membrane?

Energy production (correct)

Molecular partitioning

Cell signaling

Homeostasis

Which of the following is NOT a type of transport across the plasma membrane?

Active transport

Osmosis

Diffusion

Endocytosis (correct)

Which of the following is NOT a feature of the cytoskeleton?

Golgi apparatus (D) Signup and view all the answers

Which of the following is NOT a function of cell membranes?

Energy production (A) Signup and view all the answers

Which protein monomers form dimers in microtubules?

Tubulin (A) Signup and view all the answers

What is the process by which G-actin hydrolyzes ATP to ADP in F-actin?

Hydrolysis (C) Signup and view all the answers

What is the function of capping proteins in the stability of F-actin?

Prevent disassembly (B) Signup and view all the answers

Which cellular structure is composed of a tubulin triplet structure?

Centriole (A) Signup and view all the answers

What is the process by which beta monomers cleave GTP to GDP + Pi in microtubules?

Hydrolysis (B) Signup and view all the answers

Which type of filament is responsible for the shape of microvilli in an epithelial cell?

Actin filaments (D) Signup and view all the answers

Which protein is responsible for the movement of cilia and flagella along microtubules?

Dynein (A) Signup and view all the answers

Which type of filament is commonly found in muscle cells and some epithelial cells?

Intermediate filaments (A) Signup and view all the answers

Which type of filament confers stability and structure to many mesenchymal cells?

Intermediate filaments (B) Signup and view all the answers

Which type of filament is involved in cellular movement and cell division?

Microtubules (C) Signup and view all the answers

Which of the following lipid components usually has an unbranched structure and may or may not be saturated?

Fatty acid "tail" (B) Signup and view all the answers

What is the most common molecule that the "R" of the phosphate "head" is linked to?

Choline (B) Signup and view all the answers

What impact does a smaller amount of cholesterol have on membrane fluidity?

Stiffens the membrane (D) Signup and view all the answers

Which type of lipid has a different structure with a "backbone" consisting of sphingosine instead of glycerol?

Sphingolipid (C) Signup and view all the answers

Which of the following is NOT a function of the glycocalyx?

Contribution to the glycocalyx (C) Signup and view all the answers

Which of the following is the correct function of membrane proteins?

Signaling (B) Signup and view all the answers

What is the purpose of tight junctions?

Regulate movement across membranes (B) Signup and view all the answers

Which cytoskeletal structure is responsible for trafficking of organelles and cell division?

Microtubules (A) Signup and view all the answers

What is the function of adherens junctions?

Connect cells to the cytoskeleton (B) Signup and view all the answers

What is the overall function of the cytoskeleton?

All of the above (D) Signup and view all the answers

Which of the following best describes osmosis?

The diffusion of water through a semi-permeable membrane (C) Signup and view all the answers

What happens when sugar is added to the right side of the U-tube model?

The solution does not overflow on the right side (D) Signup and view all the answers

What is the role of the Na+/K+ ATPase in the plasma membrane?

It establishes a gradient of sodium and potassium across the membrane (A) Signup and view all the answers

Which type of transport requires ATP?

Active transport (B) Signup and view all the answers

Why is the membrane surrounding each organelle important to the cell?

It allows for compartmentalization of cellular processes (D) Signup and view all the answers