Mig1 recruits a “repressing complex” containing the Tup1 protein. This complex is recruited by many yeast DNA-binding proteins that repress transcription, including the alpha2 protein involved in controlling the mating-type specific. Tup1 also has counterparts in mammalian cells, choose correct mechanisms have been proposed to explain the repressing effect of Tup1.

I-Tup1 acts on nucleosomes either through recruiting histone deacetylases and/or by positioning a nucleosome at or near the transcription start site.

II-Tup1 interacts directly with the transcriptional machinery at the promoter and inhibits initiation.

TLS Online TPP Program

#Question id: 27979

#Unit 1. Molecules and their Interaction Relevant to Biology

In the Alternative respiratory pathway 

a. the external NADH dehydrogenase is rotenone insensitive 

b. the external NADH dehydrogenase is cyanide-resistant

c. alternative oxidase is cyanide-resistant 

d. alternative oxidase is rotenone insensitive

TLS Online TPP Program

#Question id: 27980

#Unit 1. Molecules and their Interaction Relevant to Biology

The proton-motive force has 

a. chemical potential energy due to proton-proton repulsion

b. chemical potential energy due to H+ difference in the two regions separated by the membrane 

c. electrical potential energy H+ difference in the two regions separated by the membrane 

d. electrical potential energy due to proton-proton repulsion

Which of the following is true

TLS Online TPP Program

#Question id: 27981

#Unit 1. Molecules and their Interaction Relevant to Biology

The free energy required for the release of ATP from F_O-F₁ is provided by

TLS Online TPP Program

#Question id: 27982

#Unit 1. Molecules and their Interaction Relevant to Biology

Reactions catalyzed by FoF1

a. Perform by mechanism of rotational catalysis 

b.. Gamma rotate 120 degree to contact with beta subunit 

c. Gamma rotate 360 degree to contact with beta subunit 

d. beta rotate 120 degree to contact with Gamma

Which of the following is true

TLS Online TPP Program

#Question id: 27983

#Unit 1. Molecules and their Interaction Relevant to Biology

Dinitrophenol (DNP) is an uncoupler, allowing

TLS Online TPP Program

#Question id: 27984

#Unit 1. Molecules and their Interaction Relevant to Biology

Correct order of Electron transfer through Complex IV is