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How can DNA repair itself to maintain genetic integrity?
DNA repair mechanisms are essential for maintaining genetic integrity by fixing any damage or errors that occur in the DNA molecule. There are several pathways that cells use to repair DNA, such as base excision repair, nucleotide excision repair, and mismatch repair. These pathways involve specialized proteins that recognize and correct different types of damage, ensuring that the DNA remains stable and functional.
Is the DNA in prokaryotic cells circular or eukaryotic cells?
The DNA in prokaryotic cells is circular, while the DNA in eukaryotic cells is linear.
Is it true or false that prokaryotic cells contain more DNA than eukaryotic cells?
False. Eukaryotic cells generally contain more DNA than prokaryotic cells. Eukaryotic cells have their DNA enclosed within a nucleus, whereas prokaryotic cells have their DNA located in the cytoplasm.
Do prokaryotic cells have circular DNA?
Yes, prokaryotic cells have circular DNA.
Do eukaryotes have circular DNA in their cells?
No, eukaryotes do not have circular DNA in their cells. They have linear DNA organized into chromosomes within the nucleus.
How is the number of replication errors in cells kept to a minimum?
Cells have various mechanisms to ensure accurate replication and minimize errors. These include proofreading by DNA polymerase, DNA repair pathways, and cell cycle checkpoints that monitor DNA integrity. Additionally, telomeres at the ends of chromosomes help prevent loss of genetic information during replication.
Why scientists need to extract DNA from living cells and not dead cells?
Scientists extract DNA from living cells because living cells maintain intact cellular structures and active metabolic processes, which preserve the integrity and functionality of the DNA. In contrast, DNA from dead cells can be degraded or damaged due to environmental factors and the natural breakdown processes that occur after cell death. Analyzing DNA from living cells also allows for insights into ongoing biological processes, such as gene expression and cellular responses, which are crucial for research in genetics, medicine, and biotechnology.
What happens if you enter mitosis without properly copying its DNA?
If a cell enters mitosis without properly copying its DNA, it can lead to serious consequences, including cell malfunction and genetic instability. The daughter cells may end up with incomplete or abnormal sets of chromosomes, which can cause issues such as cell death, tumors, or inherited genetic disorders. This failure to replicate DNA accurately can disrupt normal cellular function and contribute to the development of cancerous cells. Additionally, the cell cycle checkpoints that monitor DNA integrity may halt the process to prevent these errors.
How can a reporter enzyme monitor transformation of host cells by foreign DNA in addition to a selectable marker?
A reporter enzyme monitors transformation of host cells by foreign DNA in addition to a selectable marker through insertional inactivation. It differentiates recombinants from non recombinants.
How can DNA repair itself to maintain genetic integrity?
DNA repair mechanisms are essential for maintaining genetic integrity by fixing any damage or errors that occur in the DNA molecule. There are several pathways that cells use to repair DNA, such as base excision repair, nucleotide excision repair, and mismatch repair. These pathways involve specialized proteins that recognize and correct different types of damage, ensuring that the DNA remains stable and functional.
What checks DNA for error?
DNA fingerprinting
Is the DNA in prokaryotic cells circular or eukaryotic cells?
The DNA in prokaryotic cells is circular, while the DNA in eukaryotic cells is linear.
Does DNA have cells?
no. Cells have DNA not the other way around
What is a DNA lesion?
A DNA lesion is a structural change to the DNA molecule that can lead to mutations or abnormalities in genetic information. Lesions can be caused by various factors such as environmental toxins, radiation, or errors during DNA replication. Repair mechanisms in cells help to correct these lesions to maintain genome integrity.
How is the DNA in your brain cells different from the DNA in your heart cells?
They use different DNA codes
How do cells prevent mutations during DNA replication?
Cells prevent mutations during DNA replication through several mechanisms. DNA polymerases have proofreading abilities, allowing them to identify and correct errors by removing incorrectly paired nucleotides. Additionally, other repair systems, such as mismatch repair, scan the DNA for errors after replication and correct them. These processes together help maintain the integrity of the genetic information.
Is it true or false that prokaryotic cells contain more DNA than eukaryotic cells?
False. Eukaryotic cells generally contain more DNA than prokaryotic cells. Eukaryotic cells have their DNA enclosed within a nucleus, whereas prokaryotic cells have their DNA located in the cytoplasm.
