TLS Online TPP Program

#Question id: 697


The major reason that antiparallel B-stranded protein structures are more stable than parallel B-stranded structures is that the latter:

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. are in a slightly less extended configuration than antiparallel strands.

  2. do not have as many disulfide crosslinks between adjacent strands.

  3. do not stack in sheets as well as antiparallel strands.

  4. have weaker hydrogen bonds laterally between adjacent strands.

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TLS Online TPP Program

#Question id: 29061

#Unit 10. Ecological Principles

Ecological niche modelling is termed as

TLS Online TPP Program

#Question id: 29062

#Unit 10. Ecological Principles

Ecological envelope is termed as____

TLS Online TPP Program

#Question id: 29063

#Unit 10. Ecological Principles

Which of the following statement correct define the Proportional similarity values ?
a) less than 0.70 have been taken to indicate competitive exclusion
b) greater than 0.70 indicate possible coexistence
c) less than 0.70 have been taken to indicate possible coexistence
d) greater than 0.70 indicate competitive exclusion

TLS Online TPP Program

#Question id: 29064

#Unit 10. Ecological Principles

Regarding the geographic range of a species, which of the following statements is true?

TLS Online TPP Program

#Question id: 29065

#Unit 10. Ecological Principles

Ecological and crude density of fish prey in related with predator. Water level is drop during the dry season and further increases in a rainy season. Following some observation effect are present on their density
A) Ecological density is not change with respect to water level       
B) Ecological density is gradually decrease with low water level
C) Crude density increases over ecological density during low water level             
D) Ecological density increases while crude density decreases during low water level
E) There is no effect on crude density with seasonal water level

Which of the following above observation is correct?

TLS Online TPP Program

#Question id: 29066

#Unit 10. Ecological Principles

What will have not the drawbacks of Mark-recapture technique ?