Biologists performed an experiment with flies to examine the effects of population size on the maintenance of genetic variation  and  on  egg-to-adult survival.  From  a  large  source  population, they  randomly  assigned  eggs  to  three experimental  populations  of  size  N,  equal  to  20,  60,  and0100.  For  later  generations,  they  collected  N  eggs  from each  population  and  moved  them  into  identical  vials  that  co0ntained  f2re0sh  me4d0ium.  Th6e0y  coun8te0d  the  number  of adult flies that emerged and used tissue samples from the adults for genetic analyses. Genetic variation was measured by  scoring  alleles  at  several  polymorphic  loci  and  expressed  as  the  average  number  of  alleles  at  those  loci.  The results are summarized in Figure 1 and Figure 2 below.

Based on Figure 1, which of the following best describes the change in genetic variation over time? 

TLS Online TPP Program

#Question id: 26451

#Unit 3. Fundamental Processes

Which of the following characteristics of sigma affect non specific binding of the core

TLS Online TPP Program

#Question id: 26450

#Unit 3. Fundamental Processes

Which of the following statements is true regarding bacterial RNA polymerase   

a. Core enzyme can efficiently transcribe both intact and nicked DNA 

b. Sigma destabilizes nonspecifically bound core 

c. Holoenzyme bind tightly to DNA 

d. Higher disassociation rate at lower temperature 

e. Most of the cellular sigma are house keeping gene

TLS Online TPP Program

#Question id: 26449

#Unit 3. Fundamental Processes

Ability of core and holoenzyme to transcribe DNAs differs, so choose which of the following is correct

a.With  subunit, the holoenzyme worked equally well on both intact as well as nicked types of DNA

b.With  subunit, the holoenzyme worked unequally on both intact as well as nicked types of DNA

c.Core subunit α2ββσ can not perform polymerization on to the intact DNA while perform some of the activity on to the nicked DNA

d.Core subunit α2ββσ can not perform polymerization on to the intact DNA AS WELL AS  to the nicked DNA

TLS Online TPP Program

#Question id: 26448

#Unit 3. Fundamental Processes

Choose the correct statement regarding DNA photolyase 

a.MTHF polyglu absorb blue light photon of 300-500 nm

b.And the MTHF polyglu radicalize FADH cofactor

c.And this FADH cofactor donate single electron to CBD 

d.And this FADH cofactor donate many electron to CBD

TLS Online TPP Program

#Question id: 26447

#Unit 3. Fundamental Processes

Which polymerases are template-dependent, they incorporate nucleotides in a manner that is independent of base pairing

TLS Online TPP Program

#Question id: 26446

#Unit 3. Fundamental Processes

Which of the following is a universal marker for double strand breaks