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TLS Online TPP Program

#Question id: 8778

The following question refers to this phylogenetic tree, depicting the origins of life and the three domains. Horizontal lines indicate instances of gene or genome transfer.

A possible phylogenetic tree for the three domains of life.

If the early history of life on Earth is accurately depicted by the figure, then which statement is most in agreement with the hypothesis proposed by this tree?

#Unit 9. Diversity of Life Forms
  1. The last universal common ancestor of all extant species is one individual species.
  2. The origin of the three domains appears as a polytomy.
  3. Archaean genomes should not contain genes that originated in bacteria, and vice versa.
  4. Eukaryotes are more closely related to archaeans than to bacteria.
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TLS Online TPP Program

#Question id: 26467

#Unit 3. Fundamental Processes

Which of the following protein reduces the lifetimes of the rrn open promoters to a level at which they are responsive to changes in iNTP and ppGpp concentrations
TLS Online TPP Program

#Question id: 26468

#Unit 3. Fundamental Processes

RNA polymerase performs two proofreading functions on that growing transcript Choose the correct statement regarding the proofreading functions
a.in the pyrophosphorolytic editing catalyze the removal of an incorrectly inserted ribonucleotide, by reincorporation of PPi
b.In the pyrophosphorolytic editing the polymerase backtracks by one or more nucleotides and cleaves the RNA product
c.In hydrolytic editing, the polymerase backtracks by one or more nucleotides and cleaves the RNA product
d.In hydrolytic editing, catalyze the removal of an incorrectly inserted ribonucleotide, by reincorporation of Ppi
TLS Online TPP Program

#Question id: 26469

#Unit 3. Fundamental Processes

RNA proofreading and backtrack in the prokaryotes is done by
TLS Online TPP Program

#Question id: 26470

#Unit 3. Fundamental Processes

Choose which of the following statement is incorrect regarding the TCRF
TLS Online TPP Program

#Question id: 26471

#Unit 3. Fundamental Processes

Intrinsic terminators are responsible for prokaryotic transcription termination, so which of the following is the characteristics of Intrinsic terminators
a. It  include palindromic regions 
b. It do not include palindromic regions 
c. Palindromic regions that form hairpins varying in length from 7 to 20 bp
d. The stem-loop structure includes a G-C–rich region and is followed by a run of 7U residues.
TLS Online TPP Program

#Question id: 26472

#Unit 3. Fundamental Processes

The script that do not have intrinsic terminators known as