Practice Questions

TLS Online TPP Program

#Question id: 13165

One of the main ways by which the insulin signaling pathway might function to lower longevity is to activate mTORC1, a protein kinase complex that promotes the translation of mRNA into proteins in response to nutrients and hormones, select incorrect statement;

#5. Developmental Biology

Dietary restriction reduces mTORC1 activity,
Mice with reduced mTORC1 levels had longer lives, better protection against age-related cognitive dysfunction
Reducing mTORC1 decreases the amount of autophagy,
Increases removal and replacement of damaged organelles and senescent cells.

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TLS Online TPP Program

#Question id: 10707

#10. Ecological Principles

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

TLS Online TPP Program

#Question id: 10708

#10. Ecological Principles

Which of the following statements is a likely explanation for why invasive species take over communities into which they have been introduced?

TLS Online TPP Program

#Question id: 10716

#10. Ecological Principles

The stability of a food web in a community is quantified using certain parameters which are defined below. Which of the following is an CORRECT representation?

A. Community with more complex is more stable

B. Community with more number of alternate is more stable

C. Stability of community is inversely proportional to Connectance

D. Community with higher value of dominax index is more stable

TLS Online TPP Program

#Question id: 10719

#10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services, Following statement are given

A) Community services decline with decreased species richness in a stepwise fashion.

B) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions

C) Species richness declines even slightly from its natural levels, community services are reduced immediately

D) Community services change as the number of species increases or decreases, but that the direction of change is not predictable.