Nucleic acid sequences that undergo few changes over the course of evolutionary time are said to be conserved. Conserved sequences of nucleic acids

TLS Online TPP Program

#Question id: 24328

#Unit 4. Cell Communication and Cell Signaling

Tight junctions prevent the diffusion of: 

a. Macromolecules

b. Small water-soluble molecules

c. Ions 

d. Membrane proteins 

e. Glycolipids

Choose the correct set of combinations

TLS Online TPP Program

#Question id: 24329

#Unit 4. Cell Communication and Cell Signaling

_______permit the passage of molecules as large as 1.2 nm in diameter (molecules smaller than 1200 Da).

TLS Online TPP Program

#Question id: 24330

#Unit 4. Cell Communication and Cell Signaling

Ions, low-MW precursors of cellular macromolecules, products of intermediary metabolism, & small intracellular signaling molecules can pass from cell to cell through_______?

TLS Online TPP Program

#Question id: 24331

#Unit 4. Cell Communication and Cell Signaling

Select the CORRECT combination by matching the junctions with their principal CAMs or adhesion receptors.

Junctions	Principal CAMs or Adhesion receptors
1. Tight junctions	a. Integrins
2. Gap Junctions	b. Occludin
3. 3-D adhesions	c. Connexin
4. Plasmodesmata	d. Undefined

TLS Online TPP Program

#Question id: 24555

#Unit 4. Cell Communication and Cell Signaling

Naturally occurring passive form of immunity is

a) maternal IgG crosses the placenta

b) maternal IgE crosses the placenta

c) maternal IgA present in breast milk

d) Maternal IgM present in breast milk

TLS Online TPP Program

#Question id: 24556

#Unit 4. Cell Communication and Cell Signaling

When is passive Immunization  given?

a. Exposure of toxin cause immediate response 

b. Exposure to pathogen that can cause death faster rather than faster activation of immunity

c. Exposure of venom cause immediate threat to life 

d. Abundance of immunity