Can we consider the mitochondria as an independent living creature?
Despite their many similarities, mitochondria (and chloroplasts) aren’t free-living bacteria anymore. The first eukaryotic cell evolved more than a billion years ago. Since then, these organelles have become completely dependent on their host cells.
Do mitochondria have their own DNA and divide independently of the cell?
Mitochondria are unusual organelles. They act as the power plants of the cell, are surrounded by two membranes, and have their own genome. They also divide independently of the cell in which they reside, meaning mitochondrial replication is not coupled to cell division.
How do mitochondria support the Endosymbiotic theory?
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 evidence supports the argument that ancestors of mitochondria and chloroplasts once lived as independent organisms?
The endosymbiosis theory supports the arguement that ancestors of mitochondria and chloroplasts once lived as independent organisms.
Is mitochondria living or nonliving?
But anything that makes up a cell necessarily has to not be alive. So all of the organelles in a cell like the nucleus, mitochondria, and endoplasmic reticulum are all non-living.
Is mitochondria found in all living cells?
Where are mitochondria found? Mitochondria are found in all body cells, with the exception of a few. There are usually multiple mitochondria found in one cell, depending upon the function of that type of cell. Mitochondria are located in the cytoplasm of cells along with other organelles of the cell.
Do mitochondria replicate themselves?
Mitochondria are self-replicating organelles that occur in various numbers, shapes, and sizes in the cytoplasm of all eukaryotic cells. Mitochondria contain their own genome that is separate and distinct from the nuclear genome of a cell.
Can mitochondria replicate on its own?
Mitochondria is considered as autonomous cell organelle due to the following counts : Mitochondria have their own DNA which can replicate independently. The. The organelles posses their own ribosomes,called mitoribosomes.
How do mitochondria and chloroplasts support endosymbiotic theory?
Explanation: Bacteria, a prokaryote, has circular DNA, as do mitochondria and chloroplasts. This provides support for the Endosymbiotic Theory, which states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote).
Why are mitochondria inside our cells?
Mitochondria are essential components of nearly all cells in the body. These organelles are the powerhouses for cells, providing energy to carry out biochemical reactions and other cellular processes. Mitochondria make energy for cells from the chemical energy stored in the food we eat.
What evidence supports the hypothesis that mitochondria were once free-living prokaryotic cells?
What evidence supports the hypothesis that mitochondria were once free-living prokaryotic cells? They replicate independently of the cell they are in. They have circular pieces of DNA. How did anaerobic cells influence the development of aerobic cells?
Do you think that a mitochondria or chloroplast used to be a free-living organism?
The mitochondrion and the chloroplast are both organelles that were once free-living cells. They were prokaryotes that ended up inside of other cells (host cells). They may have joined the other cell by being eaten (a process called phagocytosis), or perhaps they were parasites of that host cell.
What is the origin of mitochondria?
The endosymbiotic hypothesis for the origin of mitochondria (and chloroplasts) suggests that mitochondria are descended from specialized bacteria (probably purple nonsulfur bacteria) that somehow survived endocytosis by another species of prokaryote or some other cell type, and became incorporated into the cytoplasm.
Do mitochondria have their own life?
Closed 1 year ago. Theoretically, mitochondria are said to be a separate organism that is concerned with its own life and its own processes. In fact, it even duplicates individually. I know a similar question is here but I have something else apart from that to ask.
What is the size of mitochondria under microscope?
The structure of mitochondria A basic diagram of a mitochondrion Mitochondria are small, often between 0.75 and 3 micrometers and are not visible under the microscope unless they are stained. Unlike other organelles (miniature organs within the cell), they have two membranes, an outer one and an inner one.
Why do mitochondria and chloroplasts have ribosomes?
We also know that mitochondria and chloroplasts have DNA and ribosomes, just as bacteria do. Scientists believe that host cells and bacteria formed a mutually beneficial endosymbiotic relationship when the host cells ingested aerobic bacteria and cyanobacteria but did not destroy them.