Which of the following is (are) associated with most polyadenylation events?

a. cleavage of the 5´ end of the RNA molecule

b. an assembly of a large, multiprotein complex

c. the AAUAAA site upstream of where polyadenylation will occur

d. a GU-rich or U-rich region near the cleavage site

e. slow addition of A residues followed by rapid addition of 200 to 250 more A residues

TLS Online TPP Program

#Question id: 24284

#Unit 4. Cell Communication and Cell Signaling

All are the types of anchoring junctions that are present in animal cells, EXCEPT

TLS Online TPP Program

#Question id: 24285

#Unit 4. Cell Communication and Cell Signaling

Adherens junctions: 

TLS Online TPP Program

#Question id: 24286

#Unit 4. Cell Communication and Cell Signaling

Identify the correct matching by taking one item from each column

Column-I;  Anchoring junctions	Column-II;  Adhesion type	Column-III;  Cytoskeletal attachment
a. Desmosomes	1. Cell-cell	P. Intermediate filaments
b. Adherens junctions	2. Cell-matrix	Q. Actin filaments
c. Hemidesmosomes
d. Focal adhesions

TLS Online TPP Program

#Question id: 24287

#Unit 4. Cell Communication and Cell Signaling

What are the key components of desmosomes?

a. Claudin

b. Desmocollin

c. Occludin

d. Desmoglein

Choose the correct combinations.

TLS Online TPP Program

#Question id: 24288

#Unit 4. Cell Communication and Cell Signaling

Select the CORRECT combination by matching the junctions with their functions.

Anchoring junctions	Functions
1. Desmosomes	a. Strength, durability, signalling
2. Adherents junctions	b. Shape, tension, signalling, force transmission
3. Hemidesmosomes	c. Shape, rigidity, signalling
4. Focal adhesions	d. Shape, signalling, force transmission, cell movement

TLS Online TPP Program

#Question id: 24325

#Unit 4. Cell Communication and Cell Signaling

The principal ECM adhesion receptor in epithelial hemidesmosomes is;