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What keeps DNA in the nucleus?
Nuclear envelope – The nuclear envelope is made up of two separate membranes: the outer membrane and the inner membrane. Pore – The pores are small channels through the nuclear envelope. They allow for smaller molecules to pass through such as messenger RNA molecules, but keep larger DNA molecules inside the nucleus.
What organelle keeps DNA safe?
The nucleus
The nucleus is spheroid in shape and separated from the cytoplasm by a membrane called the nuclear envelope. The nuclear envelope isolates and protects a cell’s DNA from various molecules that could accidentally damage its structure or interfere with its processing.
Where is DNA located inside the nucleus?
chromosomes
How Is DNA Stored Inside Your Cells? DNA is packed tightly in the nucleus of your cells as chromosomes. A chromosome is a thread-like structure that has DNA coiled around proteins called histones. Humans are ‘diploid’ organisms, which means they have two copies of each chromosome—one from mom and one from dad.
Is DNA stored in the nucleolus?
The nucleolus occupies up to about 25% of the volume of the cell nucleus. It contains most of the cell’s genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, (histones) to form chromosomes.
Where is DNA kept?
Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.
What molecule can leave the nucleus?
Messenger RNA (mRNA) is a single-stranded RNA molecule that is complementary to one of the DNA strands of a gene. The mRNA is an RNA version of the gene that leaves the cell nucleus and moves to the cytoplasm where proteins are made.
What molecule Cannot leave the nucleus?
Since DNA molecules can’t leave the nucleus, the synthesis of RNA has to occur in the nucleus. On the other hand, proteins are synthesized in the cytosol and rough endoplasmic reticulum through translation. Proteins cannot be synthesized directly in the nucleus.