Higher cells incorporate an ancient chromosome.

Ivan Wallin presents his idea that mitochondria and chloroplasts were once free-living organisms.

Related Content

16646. Concept 30: Higher cells incorporate an ancient chromosome.

Mitochondria contain a circular genome molecule, tightly packed with genes.

  • ID: 16646
  • Source: DNAFTB

16648. Gallery 30: Ivan Wallin

Ivan Wallin.

  • ID: 16648
  • Source: DNAFTB

16654. Biography 30: Ivan Emanuel Wallin (1883 - 1969)

Ivan Wallin was one of the first proponents of the idea that mitochrondria are derived from bacteria.

  • ID: 16654
  • Source: DNAFTB

16877. Cell Signals

Journey inside a cell as you follow proteins and learn about cellular interactions. This 3-D animation brings to life the inner workings of a fibroblast cell as it responds to external signals. Created by Cold Spring Harbor Laboratory and Interactive Know

  • ID: 16877
  • Source: DNALC

15179. Mitochondria from the beginning, Douglas Wallace

Molecular geneticist Douglas Wallace talks about the origin of our mitochondria and the DNA within.

  • ID: 15179
  • Source: DNAi

1024. Pathways, Releasing the protein

In this section learn that newly made proteins leave the endoplasmic reticulum wrapped in a layer of membrane called a vesicle.

  • ID: 1024
  • Source: IC

16087. Animal cell

Organelles in a typical animal cell.

  • ID: 16087
  • Source: DNAi

16705. Animation 34: Genes can be moved between species.

Stanley Cohen and Herbert Boyer transform bacteria with a recombinant plasmid, and Doug Hanahan studies induced transformation.

  • ID: 16705
  • Source: DNALC.DNAFTB

1021. Pathways, To the nucleus

In this section learn that many signaling pathways ultimately pass messages to the nucleus of a cell.

  • ID: 1021
  • Source: IC

15549. Transcription/translation - Exons and introns

In most eukaryotic genes, coding regions (exons) are interrupted by noncoding regions (introns).

  • ID: 15549
  • Source: DNALC.DNAi