Chloroplasts contain DNA separate from the DNA in the nucleus of the plant cell.

Question

Chloroplasts contain DNA separate from the DNA in the nucleus of the plant cell. When Scientists sequenced chloroplast genomes, it was discovered that the sequences are very similar to sequences found within photosynthetic bacteria known as cyanobacteria (refer to Figure 7.1 0n pg. 108 your textbook). Briefly explain the evolutionary significance of this. Common Thread Connection: 1. A research scientist working for an alternative fuels startup discovers a new species of algae in Utah's Great Salt Lake. The scientist is excited to observe that the algae have pure white leaves. (Remember that white light contains all the other colors of light.) Briefly explain why the scientist is excited about this discovery in relation to the production of biofuels for his company.

Explanation / Answer

Chloroplasts are believed to be evolved from cyanobacteria. Chloroplasts have originated from cyanobacteria due to a endosymbiotic process during which a photosynthesizing cyanobacteria became trapped in an eukaryotic and became a permanent member of the cell.There are many similarities between cyanobacteria and chloroplasts in that both have double membranes,DNA ,70s ribosomes, chlorophyll a and thylakoids.Many years ago,a cyanobaceria entered an eukaryotic cell in seach of food or as a prey, but successfully escaped the phagocytic vacuole. The cyanobacteria then became an endosymbioant and providede food to the eukaryote.The cyanobacteria eventually became assimilated and several of its genes were transferred to the eukaryote nucleus.It led to the formation of chloroplasts.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.