In the absence of gibberellin, the DELLA proteins

a) positively regulate GID1, GA20ox, and GA3ox

b)negatively regulate GA2ox

c) positively regulate GA2ox

d)negatively regulate GID1, GA20ox, and GA3ox

Which of the following is correct

#Question id: 2447

#Unit 2. Cellular Organization

In the axonemes, the arrangement of nine outer doublet microtubules, as well as the protofilament number of each outer doublet, is specified by

#Question id: 2448

#Unit 2. Cellular Organization

Axonemal dynein

a. may contain two or three head domains.

b. attaches to a B tubule through its base domain.

c. consists of heavy, intermediate and light chains.

d. is a (-) end-directed motor.            

e. is an ATPase.

#Question id: 2449

#Unit 2. Cellular Organization

What is the correct order of the stages of mitosis?

a. anaphase               

 b. metaphase              

c. telophase    

d. prophase                 

e. prometaphase

#Question id: 2450

#Unit 2. Cellular Organization

Which of the following contribute(s) to pole separation during anaphase B?

a. cytosolic dynein     

b. a (-) end-directed kinesin               

c. CENP-E                     

d. microtubule depolymerisation                   

e. microtubule polymerization

#Question id: 2451

#Unit 2. Cellular Organization

The average lifetime of microtubules during mitosis is

#Question id: 2452

#Unit 2. Cellular Organization

Intermediate filaments

a. are typically 6 nm in diameter.                  

b. are essential for cell motility.

c. may be used to diagnose the tissue of origin for many cancers.

d. are composed of globular subunits.                       

e. are formed from tetrameric subunits.