TLS Online TPP Program

#Question id: 4954


If natural selection in a particular environment favored genetic systems that permitted the production of daughter ʺcellsʺ that were genetically dissimilar from the mother ʺcells,ʺ then one should expect selection for

I. polynucleotide polymerase with low mismatch error rates.

II. polynucleotide polymerases without proofreading capability.

III. batteries of efficient polynucleotide repair enzymes.

IV. polynucleotide polymerases with proofreading capability.

V. polynucleotide polymerases with high mismatch error rates.

#Unit 11. Evolution and Behavior
  1. I only

  2. I and IV

  3. I, III, and IV

  4. II and V

More Questions
TLS Online TPP Program

#Question id: 4103

#Unit 3. Fundamental Processes

In a biochemical experiment, you compare the products from splicing reactions carried out in vitro using three different substrates. In each case the substrate is a construct containing a single intron surrounded by two exons, and in all cases the construct is the same overall size. But in one case, the intron is a group I intron, in another a group II intron, and in the third an intron removed by the spliceosome. Each construct is labelled in a manner that allows it to be detected after gel electrophoresis, and each is tested in two reactions—one, conditions that support self-splicing, and two, in the presence of nuclear extract as well. Note that, for simplification, only the final products of the splicing reaction are seen, but before degradation of the introns.

 Which of the following observation is/are correct?

A. In lane A, the presence of nuclear abstract, a band for the lariat and the spliced product and pre-mRNA.

B. Lane B shows Group I Introns and Lane C is for Group II introns and reaction is nonself-splicing

C. Lane C is Group I intron. Splicing takes place in the absence and presence of nuclear abstract, and the reaction is self-splicing.

TLS Online TPP Program

#Question id: 15453

#Unit 4. Cell Communication and Cell Signaling

Activated B cells divide and differentiate into antibody-producing plasma cells, this process occurred in 

TLS Online TPP Program

#Question id: 19103

#Unit 6. System Physiology – Plant

During infection, most bacteria remain in extracellular spaces and use a specialized mechanism, to deliver bacterial effector proteins into the plant cell that is

TLS Online TPP Program

#Question id: 3696

#Unit 3. Fundamental Processes

In eukaryotes, which of the following DNA polymerase is required for mitochondrial DNA replication?

TLS Online TPP Program

#Question id: 23216

#Unit 13. Methods in Biology

Below are given few examples of Scanned-probe microscopy.
1. Scanning tunneling microscopy
2. Immuno-fluorescence microscopy
3. Atomic force microscopy 
4. Total internal reflection microscopy 
Which of the following option has all incorrect combination?