PR segment – Conduction through AV node

TLS Online TPP Program

#Id: 3507

#Unit 2. Cellular Organization

Introns have negative Fold Potential i.e. potential to form stem loop

TLS Online TPP Program

#Id: 3508

#Unit 2. Cellular Organization

Genes that share a common ancestry have similar organizations with conservation of the positions of the introns.

TLS Online TPP Program

#Id: 3509

#Unit 2. Cellular Organization

The homology between two genes can be plotted in the form of a dot matrix

TLS Online TPP Program

#Id: 3510

#Unit 2. Cellular Organization

Mutations occur at the same rate in both exons and introns, but exon mutations are eliminated more effectively by selection.

TLS Online TPP Program

#Id: 3511

#Unit 2. Cellular Organization

Introns may more freely accumulate point substitutions and other changes due to no selection pressure.  Introns evolve or accumulate mutations/changes much more rapidly than exons

TLS Online TPP Program

#Id: 3512

#Unit 2. Cellular Organization

Exons are usually short, typically encoding fewer than 100 amino acids

Exon sequences are conserved by the negative selection of individuals in which the sequences have changed.