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Hint: Internal membrane-bound organelles that are not part of the endomembrane system are found in eukaryotic cells. Mitochondria, chloroplasts, lysosomes, peroxisomes, vacuoles, and vesicles are examples of these.
Complete answer:
Prokaryotic cells have a plasma membrane surrounding them, but no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles distinguishes prokaryotes from eukaryotes, another class of organisms.
The majority of prokaryotes are single-celled organisms with a simple structure. Prokaryotic cells have a plasma membrane surrounding them, but no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles distinguishes prokaryotes from eukaryotes, another class of organisms.
Prokaryotes are very old, having evolved over 3.5 million years ago. According to research, the eukaryotic cell evolved gradually from the prokaryotic cell, giving rise to multicellular organisms. These prokaryotes can now be found almost anywhere. Some, such as E.Coli, are pathogenic. Others are extremophiles, thriving in harsh environments such as deep-sea thermal vents, cold lakes, and searing hot geysers.
Most prokaryotes carry a small amount of genetic material in the form of a single molecule of circular DNA, known as a chromosome. In prokaryotes, DNA is found in a central area of the cell known as the nucleoid, which is not surrounded by a nuclear membrane.
Thus, Prokaryotic cells do not contain membrane-bound organelles.
Note:
Many prokaryotes also carry plasmids, which are small, circular DNA molecules that are distinct from chromosomal DNA and can provide genetic advantages in specific environments. Algae are eukaryotic organisms, which have cells with a nucleus and other structures (organelles) enclosed by membranes. Prokaryotic algae are blue-green algae (Cyanophyceae or Cyanophycophyta).
Complete answer:
Prokaryotic cells have a plasma membrane surrounding them, but no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles distinguishes prokaryotes from eukaryotes, another class of organisms.
The majority of prokaryotes are single-celled organisms with a simple structure. Prokaryotic cells have a plasma membrane surrounding them, but no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles distinguishes prokaryotes from eukaryotes, another class of organisms.
Prokaryotes are very old, having evolved over 3.5 million years ago. According to research, the eukaryotic cell evolved gradually from the prokaryotic cell, giving rise to multicellular organisms. These prokaryotes can now be found almost anywhere. Some, such as E.Coli, are pathogenic. Others are extremophiles, thriving in harsh environments such as deep-sea thermal vents, cold lakes, and searing hot geysers.
Most prokaryotes carry a small amount of genetic material in the form of a single molecule of circular DNA, known as a chromosome. In prokaryotes, DNA is found in a central area of the cell known as the nucleoid, which is not surrounded by a nuclear membrane.
Thus, Prokaryotic cells do not contain membrane-bound organelles.
Note:
Many prokaryotes also carry plasmids, which are small, circular DNA molecules that are distinct from chromosomal DNA and can provide genetic advantages in specific environments. Algae are eukaryotic organisms, which have cells with a nucleus and other structures (organelles) enclosed by membranes. Prokaryotic algae are blue-green algae (Cyanophyceae or Cyanophycophyta).
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