TLS Online TPP Program

#Question id: 12587


The most plausible  hypothesis to  explain why  species richness is  higher in  tropical  than in  temperate regions is that

#Unit 10. Ecological Principles
  1. Tropical communities are younger.
  2. Tropical regions generally have more available water and higher levels of solar radiation. 
  3. Higher temperatures cause more rapid speciation.
  4. Biodiversity increases as evapotranspiration decreases.
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TLS Online TPP Program

#Question id: 4532

#Unit 3. Fundamental Processes

Locus control region, or LCR,

TLS Online TPP Program

#Question id: 4533

#Unit 3. Fundamental Processes

When multiple activators work together, they often do so synergistically. That is, the effect of

TLS Online TPP Program

#Question id: 4534

#Unit 3. Fundamental Processes

The yeast Saccharomyces cerevisiae divides by budding: instead of dividing to produce two identical daughter cells, the so-called mother cell buds to produce a daughter cell, The HO gene is expressed only in mother cells and only at a certain point in the cell cycle,

1. SBF

I- Which is active only during the G1-S transition of the cell cycle.

2. SWI5

II-Which acts only in the mother cell.

III- Recruit nucleosome modifiers

TLS Online TPP Program

#Question id: 4535

#Unit 3. Fundamental Processes

The activators bind—and the enhanceosome forms—in a highly cooperative manner, ensuring that all three activators must be present. The following are three ways the regulators might be binding cooperatively:

I- Through direct protein–protein interactions between them

II- By changes in the DNA caused by binding of one protein helping binding of another;

III- By the fact that the activators all interact simultaneously with the coactivator.

TLS Online TPP Program

#Question id: 4536

#Unit 3. Fundamental Processes

The human b-interferon gene is activated in cells upon viral infection through some activators, EXCEPT one

TLS Online TPP Program

#Question id: 4537

#Unit 3. Fundamental Processes

The enhancer DNA is __, but once the activators are bound it is relatively  , HMGA1 the DNA and thus helps the final structure form.