24 Questions
What type of junction mechanically attaches the cytoskeleton of a cell to the cytoskeleton of other cells or to the extracellular matrix?
Adhesive junction
What is the function of Septate/Tight junctions?
To form a barrier that can seal off a sheet of cells
What type of junction allows communication between cells through small openings?
Communication junction
What is the function of Adherens junctions?
To mechanically attach the cytoskeleton of a cell to the cytoskeleton of other cells
What type of molecule is important in the formation of adherens junction?
Cadherin
What is the function of Desmosomes?
To mechanically attach cells together
What is the function of Gap junction?
To allow small molecules to diffuse across cells
What is the location of Adhesive junctions?
In tissue subject to mechanical stress
What is the main function of dynein in vesicle transport?
To generate force and move vesicles to the minus end of microtubules
What is the main component of the cell wall in plants and protists?
Cellulose
What is the function of the middle lamella in plant cell walls?
To glue the cells together
Which of the following cell junctions is responsible for adhesion between cells?
Adhesive junctions
What is the main difference between prokaryotic and eukaryotic cell walls?
The composition of the cell wall
What is the function of motor proteins in vesicle transport?
To generate force and move vesicles along microtubules
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
What is the main component of the cell wall in fungi?
Chitin
What is the main difference between cadherin molecules in desmosomes and adherens junctions?
They are connected to intermediate filaments
What is the function of gap junctions in animal cells?
To allow diffusion of small molecules between cells
What is the structure of a connexon?
A group of 6 identical transmembrane proteins arranged in a circle
What is the function of plasmodesmata in plant cells?
To allow diffusion of small molecules between cells
What is the main difference between centrioles and centrosomes?
Centrioles are involved in cell division, while centrosomes are involved in protein synthesis
What is the main function of the lysosome?
To break down waste and foreign substances
What is the main function of the endoplasmic reticulum (ER)?
To synthesize proteins
What is the main function of the mitochondria in eukaryotic cells?
To generate energy for the cell
Learn about different types of junctions in cells, including adhesive junctions, adherens junctions, desmosomes, and hemidesmosomes. Understand their functions and locations in the body.
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