Cell Adhesion Junctions

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What type of junction mechanically attaches the cytoskeleton of a cell to the cytoskeleton of other cells or to the extracellular matrix?

Communication junction
Gap junction
Adhesive junction (correct)
Septate/Tight junction

What is the function of Septate/Tight junctions?

To attach cytoskeleton of a cell to the cytoskeleton of other cells
To form a barrier that can seal off a sheet of cells (correct)
To allow communication between cells
To allow small molecules to diffuse across cells

What type of junction allows communication between cells through small openings?

Gap junction
Communication junction (correct)
Septate/Tight junction
Adhesive junction

What is the function of Adherens junctions?

To mechanically attach the cytoskeleton of a cell to the cytoskeleton of other cells (A) Signup and view all the answers

What type of molecule is important in the formation of adherens junction?

Cadherin (A) Signup and view all the answers

What is the function of Desmosomes?

To mechanically attach cells together (C) Signup and view all the answers

What is the function of Gap junction?

To allow small molecules to diffuse across cells (B) Signup and view all the answers

What is the location of Adhesive junctions?

In tissue subject to mechanical stress (A) Signup and view all the answers

What is the main function of dynein in vesicle transport?

To generate force and move vesicles to the minus end of microtubules (B) Signup and view all the answers

What is the main component of the cell wall in plants and protists?

Cellulose (C) Signup and view all the answers

What is the function of the middle lamella in plant cell walls?

To glue the cells together (A) Signup and view all the answers

Which of the following cell junctions is responsible for adhesion between cells?

Adhesive junctions (D) Signup and view all the answers

What is the main difference between prokaryotic and eukaryotic cell walls?

The composition of the cell wall (D) Signup and view all the answers

What is the function of motor proteins in vesicle transport?

To generate force and move vesicles along microtubules (B) Signup and view all the answers

What is the function of the primary cell wall in plant cells?

To lay down the outer layer of the cell wall during cell growth (D) Signup and view all the answers

What is the main component of the cell wall in fungi?

Chitin (A) Signup and view all the answers

What is the main difference between cadherin molecules in desmosomes and adherens junctions?

They are connected to intermediate filaments (B) Signup and view all the answers

What is the function of gap junctions in animal cells?

To allow diffusion of small molecules between cells (D) Signup and view all the answers

What is the structure of a connexon?

A group of 6 identical transmembrane proteins arranged in a circle (A) Signup and view all the answers

What is the function of plasmodesmata in plant cells?

To allow diffusion of small molecules between cells (C) Signup and view all the answers

What is the main difference between centrioles and centrosomes?

Centrioles are involved in cell division, while centrosomes are involved in protein synthesis (D) Signup and view all the answers

What is the main function of the lysosome?

To break down waste and foreign substances (A) Signup and view all the answers

What is the main function of the endoplasmic reticulum (ER)?

To synthesize proteins (C) Signup and view all the answers

What is the main function of the mitochondria in eukaryotic cells?

To generate energy for the cell (D) Signup and view all the answers