EGTA [ethylene glycol-bis(b-aminoethyl ether) N,N,N′,N′-tetraacetic acid], a compound that can  

a. Introduce Ca2+ 

b. chelate Ca2+ 

c. prevents Ca2+ uptake by cells 

d. inhibits root gravitropism

Which of the following is correct

TLS Online TPP Program

#Question id: 28781

#Unit 2. Cellular Organization

During actin polymerization, the elongation phase is exponentially increasing as rapidly increases in length of short oligomer by the addition of____

TLS Online TPP Program

#Question id: 28782

#Unit 2. Cellular Organization

The rate of polymerization of actin filaments is given by rate constant K, in which_____

a) the addition of monomers is given by kon (M^–1 sec^–1 ) 

b) the addition of monomers is given by koff  (sec^–1)

c) the loss of monomers is given koff (M^–1 sec^–1 ) 

d) the loss of monomers is given koff (sec^–1)

TLS Online TPP Program

#Question id: 28783

#Unit 2. Cellular Organization

Following statements regarding the actin polymerization;

a) the concentration of G-actin is above the Cc, the filament end will grow

b) the concentration of G-actin is below the Cc, the filament end will grow

c) (+) end of microfilament polymerization is much faster than the (-) end

d) D form that adds to the filament and the T form that leaves

Which of the following statements are correct?

TLS Online TPP Program

#Question id: 28784

#Unit 2. Cellular Organization

Cytochalasin D,  a fungal alkaloid, depolymerizes actin filaments by___

TLS Online TPP Program

#Question id: 28785

#Unit 2. Cellular Organization

A sponges toxin Latrunculin involve__

TLS Online TPP Program

#Question id: 28786

#Unit 2. Cellular Organization

Which of the following toxin enhances the nucleation by binding and stabilizing actin dimers and lowering the Cc?