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TLS Online TPP Program

#Question id: 2978

The most important regulatory control that restricts cyclins to the appropriate cell cycle stage is ubiquitin mediated, proteasome-dependent protein degradation. Which of the following statement is incorrect regarding to the degradation of protein?

#Unit 2. Cellular Organization

  1. SCF and APC/C are multisubunit ubiquitin-protein ligases that belong to the RING finger family of ubiquitin protein ligases which ensure that the cell cycle engine is driven forward and that cells cannot “go backward” in the cell cycle.

  2. SCF recognizes its substrates only when they are phosphorylated.

  3. The substrate specificity of active, dephosphorylated APC/C is determined in part by its association with one of two related substrate targeting factors called Cdc20 and Cdh1.

  4. The substrates of APC/C contain recognition motifs known as destruction box which is lysine rich.

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TLS Online TPP Program

#Question id: 10716

#Unit 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

#Unit 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.
TLS Online TPP Program

#Question id: 10720

#Unit 10. Ecological Principles

What is the Jaccard index between the two communities?
TLS Online TPP Program

#Question id: 10731

#Unit 10. Ecological Principles

Shannon index of diversity is calculated using the equation below


Community with 5 species and evenness value is one, what will be value of Shannon index
TLS Online TPP Program

#Question id: 10732

#Unit 10. Ecological Principles

A community plus the nonliving factors with which it interacts is called a(n)
TLS Online TPP Program

#Question id: 10734

#Unit 10. Ecological Principles

This term is a measure of the ability of a system to resist change in the face of outside influences.