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Within a differentiated B cell, the rearrangement of DNA sequences between variable regions and joining regions is accomplished by a(n) _______. A. RNA polymerase B. reverse transcriptase C. telomerase D. recombinase

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Within a differentiated B cell, the rearrangement of DNA sequences between variable regions and joining regions is accomplished by a recombinase.

Importance of Recombinase

The exchange of genetic material across several chromosomes or different areas of the same chromosome is referred to as DNA recombination.

  • This procedure is often mediated by homology; that is, homologous chromosomal regions align in preparation for exchange, and some degree of sequence similarity is necessary.
  • Recombination occurs in prokaryotic organisms as well, and it has been studied extensively in E. coli.
  • Although bacteria do not go through meiosis, they do participate in conjugation, a sort of sexual reproduction in which genetic material is transmitted from one bacterium to another and may be recombined in the recipient cell.

It entails the exact breakage of each strand, exchange between the strands, and sealing of the resulting recombined molecules (the necessity for homology implies that this occurs through complementary base-pairing, although this has not been shown clearly).

  • This mechanism happens with great frequency and accuracy in both eukaryotic and prokaryotic cells.

Hence, the correct answer is option D


Learn more about recombinase here,

https://brainly.com/question/9218375

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