TLS Online TPP Program

#Question id: 561


Enzyme X exhibits maximum activity at pH = 6.9.  X shows a fairly sharp decrease in its activity when the pH goes much lower than 6.4.  One likely interpretation of this pH activity is that:

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. a Glu residue on the enzyme is involved in the reaction.

  2. a His residue on the enzyme is involved in the reaction.

  3. the enzyme has a metallic cofactor.

  4. the enzyme is found in gastric secretions

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TLS Online TPP Program

#Question id: 10599

#Unit 10. Ecological Principles

In a type I survivorship curve characterized by:

TLS Online TPP Program

#Question id: 10600

#Unit 10. Ecological Principles

Which of the following is not feature of Type II survivorship curve?

TLS Online TPP Program

#Question id: 10601

#Unit 10. Ecological Principles

following some statement are given about Grime’s triangle that is alternative to r and K selection is correct?

A. Ruderals are adapted to take advantage of habitat disturbance, but these are less competitor 

B. Any species cannot be a good stress tolerator and a good competitor at the same time

C. Mangroves and lichens are good stress tolerant and also good adopted to disturbance

D. Many perennial herbs are good adapted to habitat disturbance, but these are less competitor 

Which one of the following options represents a combination of correct statements?

TLS Online TPP Program

#Question id: 10602

#Unit 10. Ecological Principles

What are size of female population of butterfly (Breed once and one year life span ) after two year ?

Nt = 20 (initial population ) Nt+2 =?

Ro=1.5 number of female produced per female per generation

TLS Online TPP Program

#Question id: 10603

#Unit 10. Ecological Principles

The population size of a bird increased from 600 to 700 in one year. If the per capita birth rate of this population is 0.50, what is its per capita death rate?

TLS Online TPP Program

#Question id: 10604

#Unit 10. Ecological Principles

Which of the following statement are incorrect?