Following are certain statements regarding

morphogen gradients and cell specification.

A. Morphogens are always transcription factors

B. Morphogens can be paracrine factors that are produced in one group of cells and travel to another population of cells

C. When the concentration of a morphogen drops below a certain threshold, cells stop differentiating and never get determined to another fate

D. Morphogen gradients are involved in conditional specification

Which combination of the above statements is true?

TLS Online TPP Program

#Question id: 28867

#Unit 2. Cellular Organization

During Detyrosylation, tyrosine can be removed by a carboxypeptidase, where it sequentially removes the C-terminal tyrosine

TLS Online TPP Program

#Question id: 28868

#Unit 2. Cellular Organization

Which type of Post-translational modifications are likely mutually exclusive, so they would not normally occur at the same time but both can enhance microtubule stability?

TLS Online TPP Program

#Question id: 28869

#Unit 2. Cellular Organization

Which of the following protein associates preferentially with detyrosylated and acetylated microtubules?

TLS Online TPP Program

#Question id: 28870

#Unit 2. Cellular Organization

Which of the following modification has a key role in the beating of cilia and flagella ?

TLS Online TPP Program

#Question id: 30074

#Unit 2. Cellular Organization

Following statements were made about transposons:

A. Transposons have inverted terminal repeats and their integration generates inverted repeats at the flanks of the target site in the host genome.

B. A composite transposon can transpose as a unit.

C. The transposition event may cause deletions or inversions or move a host sequence to a new location.

D. The transposition event may cause deletions or inversions but cannot move a host sequence to a new location.

E. Replicative transposition proceeds through cointegration.

Which one of the following represents the combination of the correct statements?

TLS Online TPP Program

#Question id: 30075

#Unit 2. Cellular Organization

The enzyme that catalyzes the transposition of an IS element is called __________