Practice Questions

TLS Online TPP Program

#Question id: 5223

In order to determine the probable function of a particular sequence of DNA in humans, what might be the most reasonable approach?

#11. Evolution and Behavior

Prepare a knockout mouse without a copy of this sequence and examine the mouse phenotype.
Genetically engineer a mouse with a copy of this sequence and examine its phenotype.
Look for a reasonably identical sequence in another species, prepare a knockout of this sequence in that species and look for the consequences.
Prepare a genetically engineered bacterial culture with the sequence inserted and assess which new protein is synthesized.

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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.