The edge of an A:T base pair displays the chemical groups in the order in the major groove. The code would be

TLS Online TPP Program

#Question id: 31099

#Unit 2. Cellular Organization

During actin polymerization In vitro, if the concentration of actin monomers declines, the system approaches which of the following state? 

TLS Online TPP Program

#Question id: 31100

#Unit 2. Cellular Organization

At critical concentration (Cc):

TLS Online TPP Program

#Question id: 31101

#Unit 2. Cellular Organization

Each actin molecule carries a tightly bound ATP molecule. Hydrolysis of ATP: 

TLS Online TPP Program

#Question id: 31102

#Unit 2. Cellular Organization

Which of the following statements are correct 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

TLS Online TPP Program

#Question id: 31103

#Unit 2. Cellular Organization

Cytochalasin D,  a fungal alkaloid, depolymerizes actin filaments by:

TLS Online TPP Program

#Question id: 31104

#Unit 2. Cellular Organization

Which of the following toxin enhances nucleation by binding and stabilizing actin dimers and thereby lowering the critical concentration?