Which of the following can lead to loss-of-heterozygosity in a tumor-suppressor gene?

a. deletion of the normal copy                       

b. non dysjunction during mitosis

c. somatic mutation of the normal copy

d. mitotic recombination between a wild-type and mutant allele

TLS Online TPP Program

#Question id: 28825

#Unit 2. Cellular Organization

Which of the following Troponin, is the calcium-binding subunit, controls the position of TM on the surface of an actin filament through the other subunits?

TLS Online TPP Program

#Question id: 28826

#Unit 2. Cellular Organization

Which of the following protein is closely related to the ubiquitous Ca2+-binding protein calmodulin ?

TLS Online TPP Program

#Question id: 28827

#Unit 2. Cellular Organization

Microtubules are polymers of the____

TLS Online TPP Program

#Question id: 28828

#Unit 2. Cellular Organization

The tubulin subunit is______ 

TLS Online TPP Program

#Question id: 28829

#Unit 2. Cellular Organization

α-tubulin and β-tubulin comprising 445– 450 amino acids, which are tightly held together by__

TLS Online TPP Program

#Question id: 28830

#Unit 2. Cellular Organization

Each α or β monomer has a binding site for one molecule of GTP, the GTP that is bound to α and β-tubulin.

a) α-tubulin is physically trapped at the dimer interface and is never hydrolyzed

b) α-subunit is at the surface of the dimer and GTP bound by the α-subunit can be hydrolyzed

c) β-tubulin is physically trapped at the dimer interface and it can be hydrolyzed

d) β-subunit is at the surface of the dimer and GTP bound by the β-subunit can be hydrolyzed

Select the correct combination of α and β-tubulin?