TLS Online TPP Program

#Question id: 282


A HATS enzymes reacts with the side-chain of lysine to form the following structure: What effect will the HATS enzymes have on histones?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. No effect, since histones contain few lysine residues.

  2. HATS will increase the affinity of histones for DNA.

  3. HATS will allow for easier unravelling of histone-DNA structures.

  4. HATS activate histones for interaction with mRNA.

More Questions
TLS Online TPP Program

#Question id: 15421

#Unit 5. Developmental Biology

A signal from the inducing cell is necessary for initiating new gene expression in the responding cell. Without the inducing cell, the responding cell is not capable of differentiating in that particular way, phenomena known as:

TLS Online TPP Program

#Question id: 15422

#Unit 5. Developmental Biology

During Vulval induction in C. elegans, the anchor cell secretes, a paracrine factor which receives by VPCs and become vulva. If the anchor cell is destroyed, the VPCs will not form a vulva. This is the example of:

TLS Online TPP Program

#Question id: 15441

#Unit 4. Cell Communication and Cell Signaling

In hermaphrodites, expression of the egl-1 gene in the neurons is repressed by the transcription factor, and deletion of that causes these neurons to undergo apoptosis;

TLS Online TPP Program

#Question id: 15442

#Unit 4. Cell Communication and Cell Signaling

XIAP, one member of a family of inhibitor of apoptosis proteins (IAPs), provides another way to restrain both initiator and effector caspases; Find out the INCORRECT statements about this inhibitor-

TLS Online TPP Program

#Question id: 15443

#Unit 4. Cell Communication and Cell Signaling

The caspases have which amino acid residues in their catalytic site and what is the cleavage site of these effector proteases;

TLS Online TPP Program

#Question id: 15444

#Unit 4. Cell Communication and Cell Signaling

Which is the Inhibitor of apoptosis proteins (IAPs) because of inhibition of XIAP it not able to bind with caspases, and retain in the cytosol;