Certain organelles that originated from ancient symbiotic bacteria retain their own small, circular DNA molecules. This mRNA then exits the nucleus and is translated into protein by ribosomes in the cytoplasm, linking the genetic code to the machinery of life.
Where Is DNA Found Inside Cells: The Cellular Locations Explained
Like mitochondria, they possess their own chloroplast DNA, which is passed down maternally in most flowering plants. Understanding where this vital molecule resides is the first step to grasping the basics of biology.
Instead, it is tightly wound around proteins called histones, forming a substance known as chromatin. By sequestering the master copy in the nucleus, eukaryotic cells can tightly regulate gene expression.
Where Is DNA Found Inside Cells, Including Nucleus and Organelles
When a specific protein is needed, a section of DNA is transcribed into messenger RNA (mRNA) in a process called transcription. Chloroplasts: Found only in plant and algal cells, these organelles perform photosynthesis.
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