beneath the ectoderm, a highly proliferative mesenchyme that fuels limb bud growth is called___

TLS Online TPP Program

#Question id: 34118

#Unit 2. Cellular Organization

A. Trypsin treated core histones quickly forms 30-nm fibers

B. Core histones lacking their amino-terminal tails are incapable of forming 30-nm fibers

C. Interaction between the positively charged amino terminus of histone H4 and a negatively charged region of the histone-fold domain of histone H2A is particularly important for 30-nm fiber formation

D. H2A that interact with the H4 tail are conserved across many eukaryotic organisms but are not involved in DNA binding or formation of the histone octamer.

Choose true and false

TLS Online TPP Program

#Question id: 34119

#Unit 2. Cellular Organization

30-nm fiber forms loops of 40–90 kb that are held together at their bases by a proteinaceous structure referred to as the nuclear scaffold. These are stabilised by

TLS Online TPP Program

#Question id: 34120

#Unit 2. Cellular Organization

The dynamic nature of DNA binding to the histone core structure is important, because many DNA-binding proteins strongly prefer to bind to histone-free DNA. Such proteins can recognize their binding site only when it is released from the histone octamer or is contained in linker or nucleosome-free DNA.

Which of the following statement stands untrue for above fact

TLS Online TPP Program

#Question id: 34121

#Unit 2. Cellular Organization

Replication independent assembly of histones is catalysed by

TLS Online TPP Program

#Question id: 3639

#Unit 3. Fundamental Processes

Replication of a bacterial chromosome normally starts at a fixed point called:

TLS Online TPP Program

#Question id: 3640

#Unit 3. Fundamental Processes

Which of the following is true for the mechanism of excision repair?