Question

________ is the smallest unit of the DNA capable of undergoing recombination and crossing over.
[1 mark]

• A. Exon
• B. Intron
• C. Recon
• D. Codon

Answer 1

The correct option is C Recon

Recon is the smallest unit of the DNA capable of undergoing recombination and crossing over. Hence option a is correct.

Exons are the coding and introns are the non-coding nucleotide sequences on the primary transcript (heterogeneous nuclear RNA or hnRNA) synthesised after transcription. Transcription is the process of copying genetic information from one strand of the DNA into RNA.

Codons are the triplet nucleotide sequences on the mRNA that code for specific amino acids. For example, GGU codes for glycine.