TLS Online TPP Program

#Question id: 12973


The oceans affect the biosphere in all of the following ways except 

#Unit 10. Ecological Principles
  1. Producing a substantial amount of the biosphere's oxygen.
  2. Removing carbon dioxide from the atmosphere.
  3. Moderating the climate of terrestrial biomes.
  4. Regulating the pH of freshwater biomes and terrestrial groundwater.
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TLS Online TPP Program

#Question id: 33909

#Unit 2. Cellular Organization

What is the Lk of a 5,000 bp circular duplex DNA molecule with a nick in one strand?

TLS Online TPP Program

#Question id: 33910

#Unit 2. Cellular Organization

What is the Lk of a 5,000 bp circular duplex DNA molecule after eight enzymatic turnovers by a single molecule of DNA gyrase in the presence of ATP?

TLS Online TPP Program

#Question id: 33911

#Unit 2. Cellular Organization

What is the Lk of a 5,000 bp circular duplex DNA molecule after eight enzymatic turnovers by a single molecule of DNA gyrase in the presence of ATP followed by 8 enzymatic turnovers by a single molecule of bacterial type I topoisomerase

TLS Online TPP Program

#Question id: 33912

#Unit 2. Cellular Organization

A. When a DNA molecule is negatively supercoiled, it is underwound. 
B. Any structural change involving DNA strand separation becomes more likely in negatively supercoiled DNA. 
C. Negative supercoiling makes establishment of left-handed Z-DNA in a segment of DNA 
D. The formation of plectonemic or solenoidal supercoils is favored as a means of negative supercoiling.

Find true and false

TLS Online TPP Program

#Question id: 33913

#Unit 2. Cellular Organization

A. Underwinding of a B-DNA helix might facilitate or stabilize the formation of Z-DNA.
B. Underwinding aids in the transition by providing a local region of unwound DNA that allows the shift to Z-DNA.
C. Overwinding of a B-DNA helix might facilitate or stabilize the formation of Z-DNA.
D. Overwinding aids in the transition by providing a local region of unwound DNA that allows the shift to Z-DNA.

What is correct combination of statements

TLS Online TPP Program

#Question id: 33981

#Unit 2. Cellular Organization

The scaffold-associated regions are separated by loops of DNA. The scaffold itself may contain several proteins such as
A. Topoisomerase
B. SMCs
C. RNA Polymerase