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Why is ribosomes present in chloroplast and mitochondria?
Ribosomes are present in chloroplasts and mitochondria because both organelles have their own DNA and protein synthesis machinery. They need ribosomes to translate the genetic information from their DNA into proteins that are essential for their proper functioning. Additionally, chloroplasts and mitochondria are believed to have originated from ancient bacteria that were engulfed by a host cell, and these bacteria-like organelles still retain some of the features of their bacterial ancestors, including the presence of ribosomes.
Why do scientists suspect that mitochondria and chloroplasts were originally prokaryotic cells?
Scientists saw that the membranes of mitochondria and chloroplasts resembled the cell membranes of free-living prokaryotes. This led to two hypotheses. One proposed that mitochondria evolved from endosymbiotic prokaryotes that were able to use oxygen to generate energy rich ATP. The other proposed that chloroplasts evolved from endosymbiotic prokaryotes that had he ability to photosynthesize. Mitochondria and chloroplasts share many features with free-living bacteria, such as there ribosomes have similar size and structure and they reproduce by binary fission. These similarities provide strong evidence of a common ancestry between bacteria and the organelles of living eukaryotic cells.
Plant and animal cells are?
Plant and animal cells are both types of eukaryotic cells, containing membrane-bound organelles such as the nucleus, mitochondria, and endoplasmic reticulum. However, plant cells have additional features like cell walls and chloroplasts for photosynthesis, while animal cells have specialized structures like lysosomes and centrioles.
What are the features of chloroplasts?
The chloroplast was discovered in Mereschkowsky in 1905. He stated that chloroplasts are similar to mitochondria but chloroplasts are found only in plants and protista. The chloroplast is surrounded by a double-layered membrane that is involved in energy metabolism. Chloroplasts have a few important parts such as the Stroma, which is the dense fluid within the chloroplast and is the site of conversion of carbon dioxide to sugar, the thylakoid which is the flattened sac-like membrane structures in the chloroplasts. This is the site of conversion of light energy to chemical energy. Grana is the dense layered stacks of thylakoid sacs. The grana is the site of the conversion of light energy to chemical energy. Starch is sometimes stored in the chloroplasts. Chloroplasts are necessary for photosynthesis. Plants are the main organisms that use photosynthesis to make their food. In photosynthesis, solar energy is converted to chemical energy.
What do cloroplast and mitocondria have that other organelles lack?
their own DNA
What two organelles are derived from symbiotic bacteria?
Chloroplasts and mitochondria. It is believed they were engulfed by the cells because of the dual membrane present on both. Both are believed to have originated from an endosymbiotic bacteria. Mitochondria's inner matrices contain DNA, and they have many features similar to those of bacteria. Chloroplasts are believed to have come from an endosymbiotic cyanobacteria.
Two principal organelles of eukaryotes that share features with one another and with bacteria from which they apparently were derived are the?
Two principal organelles of eukaryotes that share features with one another and with bacteria are the mitochondria and chloroplasts. Both organelles have their own DNA and ribosomes, similar to bacteria, and are thought to have originated from ancient endosymbiotic bacteria that were engulfed by early eukaryotic cells.
Why is ribosomes present in chloroplast and mitochondria?
Ribosomes are present in chloroplasts and mitochondria because both organelles have their own DNA and protein synthesis machinery. They need ribosomes to translate the genetic information from their DNA into proteins that are essential for their proper functioning. Additionally, chloroplasts and mitochondria are believed to have originated from ancient bacteria that were engulfed by a host cell, and these bacteria-like organelles still retain some of the features of their bacterial ancestors, including the presence of ribosomes.
What is the Capture hypothesis?
The Capture hypothesis proposes that organelles such as mitochondria and chloroplasts were derived from free-living prokaryotes that were engulfed by a host cell but not digested. Over time, these engulfed prokaryotes established a symbiotic relationship with the host cell, eventually becoming permanent residents within the cell. This theory is supported by the presence of prokaryotic-like features in mitochondria and chloroplasts, as well as their own genetic material.
What are two features plant sells have that animals do not?
chloroplasts
Why do scientists suspect that mitochondria and chloroplasts were originally prokaryotic cells?
Scientists saw that the membranes of mitochondria and chloroplasts resembled the cell membranes of free-living prokaryotes. This led to two hypotheses. One proposed that mitochondria evolved from endosymbiotic prokaryotes that were able to use oxygen to generate energy rich ATP. The other proposed that chloroplasts evolved from endosymbiotic prokaryotes that had he ability to photosynthesize. Mitochondria and chloroplasts share many features with free-living bacteria, such as there ribosomes have similar size and structure and they reproduce by binary fission. These similarities provide strong evidence of a common ancestry between bacteria and the organelles of living eukaryotic cells.
What is the main features of mitochondria?
mitochondria is power house of a cell as energy releasing process occurs in them they regulate ca ion concentration
What are the features of a cell?
chloroplasts, cell wall, permanent vacuole, cell membrane
What features of a liver cell show it is metabolically active?
because it has a great number of mitochondria.
Name 5 organelles of an eukaryotic cell?
As opposed to prokaryotes, eukaryotes have a clearly definable nucleus to store DNA. Obviously, the organelles present vary from cell to cell, depending hugely on each cell's function. Mitochondria are usually found, as are ribosomes(which are bigger than those in prokaryotes). Some cells will have other features: chloroplasts are found in some plant cells, and vacuoles may be present too.
What features indicate that a cell is a plant cell and not an animal cell?
lack of a cell wall and chloroplasts and the presence of centrioles
Which features of the inner membrane of mitochondria helps in ATP generation chemical reaction?
The mitochondrial matrix and cristae
