The acoustical receptors are destroyed on a population of larvae and rates of wasp predation are measured on the "deaf” larvae and  on  a  population  of  normal  larvae.  Based on the  curve  in  the  figure  and  on  the  concept  that animals possess sensory mechanisms that enhance survival, one could correctly predict which of the following?

TLS Online TPP Program

#Question id: 34177

#Unit 3. Fundamental Processes

Which of the following combination of the statements regarding polA mutants is correct

A. fail to join their Okazaki fragments 

B. fail to removes the RNA primer

C. fail to removes the mismatch errors

D. fail to synthesis Okazaki fragments 

TLS Online TPP Program

#Question id: 34178

#Unit 3. Fundamental Processes

A. SSBs interact with ssDNA in a sequence-independent manner. 

B. SSBs primarily contact ssDNA through electrostatic interactions with the phosphate backbone and stacking interactions with the DNA bases.

C. SSBs interact with ssDNA in a sequence dependent manner via hydrogen bonds with phosphate backbone

D. SSBs shows sigmoidal behaviour of binding

Choose true and false

TLS Online TPP Program

#Question id: 34179

#Unit 3. Fundamental Processes

A. At the replication fork, the dsDNA in front of the fork becomes increasingly positively supercoiled.

B. At the replication fork, the dsDNA in front of the fork becomes increasingly negatively supercoiled.

C. The “swivelase” that prevents the accumulation of positive supercoils ahead of the replication fork.

D. The “swivelase” that prevents the accumulation of negative supercoils ahead of the replication fork.

Which of the following combination of statements is correct

TLS Online TPP Program

#Question id: 34180

#Unit 3. Fundamental Processes

Many proteins that act at the replication fork interact tightly. Which of the following interactions participate in DNA protein interactions

A. Sequence dependent interaction

B. Negative charge and structure of the phosphate backbone

C. Hydrogen-bonding residues in the minor groove for the palm domain

D. Hydrophobic stacking interactions between the bases for SSBs

Choose true and false

TLS Online TPP Program

#Question id: 34181

#Unit 3. Fundamental Processes

A. In mammalian systems the DNA polymerase does not have a 5’–3’ exonuclease activity

B. In eukaryotes Synthesis of an Okazaki fragment displaces the RNA primer of the preceding fragment in the form of a “flap.”

C. FEN1 functions as an endonuclease and also has a 5’–3’ exonuclease activity

D. FEN1 prevents deletions or duplications in the genome.

Choose true and false

TLS Online TPP Program

#Question id: 34182

#Unit 3. Fundamental Processes

A. The E. coli DNA polymerase III catalytic core contains three subunits, including a catalytic subunit and a proofreading subunit.

B. The DNA Pol III holoenzyme has at least two catalytic cores, a processivity clamp, and a dimerization clamp-loader complex.

C. A clamp loader places the processivity subunits on DNA, where they form a circular clamp around the nucleic acid.

D. Two catalytic core is associated with each template strand.

Which of the following combination is correct