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TLS Online TPP Program

#Question id: 3865

Which of the following statements about E. coli RNA polymerase is false?

#Unit 3. Fundamental Processes

  1. Core enzyme selectively binds promoter regions, but cannot initiate synthesis without a sigma factor.

  2. RNA polymerase holoenzyme has several subunits.

  3. RNA produced by this enzyme will be completely complementary to the DNA template.

  4. The enzyme adds nucleotides to the 3' end of the growing RNA chain.

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TLS Online TPP Program

#Question id: 10660

#Unit 10. Ecological Principles

Given below are growth equations where dN/dt is defined as

A.  rN

B. rN[(K-N)/N]

With reference to the above equations, which one of the following statements is incorrect?
TLS Online TPP Program

#Question id: 10661

#Unit 10. Ecological Principles

Semelparous species are those that produce all of their offspring in a single reproductive event. The survivorship curve of a population of a semelparous species would most likely resemble which of the following? 
TLS Online TPP Program

#Question id: 10662

#Unit 10. Ecological Principles

Growth model of logistic with 1000 carrying capacity and exponential with ideal condition is related to initial population. (Value of rmax = .25)


A) In Logistic growth value of X should be maximum at 1000

B) In Exponetial growth value of X should be maximum at 1000

C) In Logistic growth value of X should be maximum at 500

D) In Exponential growth value of X should be constant over size of population
TLS Online TPP Program

#Question id: 10663

#Unit 10. Ecological Principles

Following is a hypothetical life table of species


Following some statement is given

A- This type of life table is characteristic of species that produce a large number of offspring

B- Its greatest mortality early in life, with relatively low rates of death for those surviving this bottleneck

C. It is characterized by high age-specific survival probability in early and middle life, followed by a rapid decline in survival in later life

D. This includes k selected species

Which of the following above statement is correct?
TLS Online TPP Program

#Question id: 10664

#Unit 10. Ecological Principles

dN/dt = rN (K-N/K ) The logistic equation above is used to describe the rate of change of a population, N, with time, t, Where r is the intrinsic rate of increase and K is the carrying capacity. What is value of per capita growth rate when population size is 200 individuals? ( K= 400, r =.25)
TLS Online TPP Program

#Question id: 10665

#Unit 10. Ecological Principles

Complete the following hypothetical life table of a species. 


Initial population size is 1000. What will be population size in next generation?