Genes are the basic unit of heredity that transfer information from one generation to another. A gene is a segment of DNA containing a sequence of nucleotides that encodes for RNA and protein. Eukaryotic genes contain introns and exons, with regulatory sequences like promoters and enhancers/silencers that control gene expression. Prokaryotic genes can be monocistronic or polycistronic operons containing multiple protein coding regions controlled by a single promoter.

1. GKM
Gene
Ahmed
Structure

2. GKM
Gene
Gene
Basic unit of Heredity transfer information from one
generation to another
A segment / Region of DNA containing a sequent of
nucleotides that encodes to RNA and to Protein
Gene
Nucleus Chromosome
DNA + HistonesNucleotides
polymers of
nucleotides
Cell

3. GKM
Gene
Eukaryotic Gene
Exon Exon Exon
Terminator
Intron
Promoter
Coreproximal
Enhancer/
Silencer
Enhancer/
Silencer
Intron
Open reading frame
EndStart
Regulatory sequenceRegulatory sequence
Upstream DownstreamProtein coding region

4. GKM
Gene
Prokaryotic Gene
TerminatorPromoterOperator
Enhancer/
Silencer
Enhancer/
Silencer
ORF
EndStart
Regulatory sequenceRegulatory sequence
Upstream Downstream
End Start
ORF
Polycistronic Operon
Protein coding region Protein coding region