TLS Online TPP Program

#Question id: 2893


Which of the following statement regarding the Nucleosome-remodeling complexes is CORRECT?

#Unit 2. Cellular Organization
  1. SWI/SNF found in all eukaryotic cells that together remodel chromatin so that nucleosomes become more regularly spaced, and inhibit the binding of transcription factors.

  2. Some members of a third family, SWR1, are involved in deposition of the H2A.Z histone variant transcriptionally active chromatin.

  3. SWI (switching) was discovered as a protein required for repression of certain genes involved in mating-type switching in yeast.

  4. The complex of GCN5 (general control non derepressible) and ADA (alteration/deficiency activation) proteins was discovered during investigation of the regulation of nitrogen metabolism genes in eukaryotes.

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TLS Online TPP Program

#Question id: 29091

#Unit 10. Ecological Principles

Increased solar energy, together with an abundance of water, results in high productivity of plants is an characteristics of____

TLS Online TPP Program

#Question id: 29092

#Unit 10. Ecological Principles

Based on the intermediate disturbance hypothesis, a community’s species diversity is increased by

TLS Online TPP Program

#Question id: 29093

#Unit 10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services
I-Elton’s hypothesis
II-rivet hypothesis
III-Redundancy hypothesis
IV-Keystone hypothesis
V-Idiosyncratic hypothesis
a) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions
b) Community services change as the number of species increases or decreases
c) there is a linear correlation between species richness and community services
d) species is an organism that helps hold the system together
e)Some species play a small but critical role in keeping the plane
Correctly match the following hypothesis with their correct  prediction;

TLS Online TPP Program

#Question id: 11651

#Unit 10. Ecological Principles

Succession on a newly exposed site that was not previously occupied by soil and vegetation refers to

TLS Online TPP Program

#Question id: 11652

#Unit 10. Ecological Principles

The sequence of changes initiated by disturbance is called succession, and the ultimate association of species achieved is called

TLS Online TPP Program

#Question id: 11653

#Unit 10. Ecological Principles

Given some characteristics of the climax community

i) Tolerate its own reactions

ii) Tends to become mesic

iii) Less stable

iv) Complex stratification

v) Simple food web

vi) Less mutualism

vii) Gross production is equals to community respiration

viii) Net community production is zero

Which of the following combination shows the characteristics of climax community?