Which two organelles are most closely associated with the endosymbiotic theory?

Which two organelles are most closely associated with the endosymbiotic theory?

The endosymbiotic origin of mitochondria and chloroplasts is widely believed because of the many similarities between prokaryotes and these organelles: 1. Mitochondria and chloroplasts are similar in size and shape to prokaryotes. 2.

What is the endosymbiotic theory and what organelles came from it?

Endosymbiotic theory posits that plastids and mitochondria were once free-living prokaryotes and became organelles of eukaryotic cells. The theory started with plastids [1] and was further developed for mitochondria [2]. It was rejected by cell biologists in the 1920s and revived in the 1960s [3].

Which of the following is the best evidence to support the endosymbiotic theory?

Answer. The strongest piece of evidence for the endosymbiotic theory is the fact that mitochondria and chloroplasts have their own circular DNA, prokaryote fashion, and can still replicate, transcribe and translate some proteins. Their ribosomes are also fashioned as a prokaryotes would be.

What are the 4 organelles all cells have in common?

All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma membrane, or cell membrane, is the phospholipid layer that surrounds the cell and protects it from the outside environment. Ribosomes are the non-membrane bound organelles where proteins are made, a process called protein synthesis.

What evidence supports the endosymbiotic theory and what 2 organelles does it involve?

There is broad evidence to show that mitochondria and plastids arose from bacteria and one of the strongest arguments to support the endosymbiotic theory is that both mitochondria and plastids contain DNA that is different from that of the cell nucleus and that they have their own protein biosynthesis machinery.

What are the main ideas of the cell theory?

The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory.

Where does the endosymbiotic theory of organelles come from?

Endosymbiotic theory goes back over 100 years. It explains the similarity of chloroplasts and mitochondria to free-living prokaryotes by suggesting that the organelles arose from prokaryotes through (endo)symbiosis.

Which is an example of an endosymbiotic organism?

Proteobacteria – The bacterial ancestor to the mitochondria organelle. Eukaryote – An organism with membrane bound organelles, thought to have evolved from endosymbiotic interactions. 1. Some people refute the theory that similar DNA is due to common descent, a cornerstone of endosymbiotic theory.

Is the chloroplast part of the endosymbiotic theory?

Endosymbiotic Theory. Both of these organelles have their own DNA and their own ribosomes that do not match the rest of the cell. This indicates that they could survive and reproduce on their own. In fact, the DNA in the chloroplast is very similar to photosynthetic bacteria called cyanobacteria.

How did Lynn Margulis come up with the endosymbiotic theory?

Endosymbiotic Theory History First proposed by Boston University biologist Lynn Margulis in the late 1960s, the Endosymbiont Theory proposed that the main organelles of the eukaryotic cell were actually primitive prokaryotic cells that had been engulfed by a different, bigger prokaryotic cell.