The polymerization of pure G-actin in vitro proceeds in three phases.

Column I	Column II
A. nucleation phase	i. G-actin monomers exchange with subunits at the filament ends, but there is no net change in the total length of filaments
B. elongation phase	ii. marked by a lag period in which G-actin subunits combine into an oligomer of two or three subunits
C. steady-state phase	iii. the short oligomer rapidly increases in length by the addition of actin monomers to both of its ends

Which of the following represent correct match?

#Question id: 4496

#Unit 3. Fundamental Processes

Facilitates chromatin transcription was identified in human cell extracts, this factor makes transcription on chromatin templates much more efficient, choose correct statements;

#Question id: 4497

#Unit 3. Fundamental Processes

Elongation, termination of transcription, and RNA processing are interconnected, presumably to ensure their proper coordination,

#Question id: 4498

#Unit 3. Fundamental Processes

Which enzyme is used in this particular mechanism;

#Question id: 4499

#Unit 3. Fundamental Processes

The final RNA processing event, polyadenylation of the 3’end of the mRNA, is intimately linked with the termination of transcription. Just as with capping and splicing, the polymerase CTD tail is involved in recruiting some of the enzymes necessary for polyadenylation,

#Question id: 4500

#Unit 3. Fundamental Processes

The free end of the second RNA is uncapped and thus can be distinguished from genuine transcripts. This new RNA is recognized by an RNase called, in yeast, _ and in humans_ that is loaded onto the end of the RNA by another protein that binds the CTD of RNA polymerase.

#Question id: 4501

#Unit 3. Fundamental Processes

According to Models of termination: torpedo and allosteric, which one is now the favored and why;

A. The Rat1 enzyme is very processive and quickly degrades the RNA in a 5’ -to-3’ direction, until it catches up to the still-transcribing polymerase from which the RNA is being spewed.

B. Termination depends on a conformational change in the elongating polymerase that reduces the processivity of the enzyme leading to spontaneous termination soon afterward.