Which of the following DNA repair mechanisms is error prone?
homologous recombination is prone to errors, potentially causing permanent genetic mutations. C) strand invasion may introduce new genes onto the damaged chromosome.
What are the three major mechanisms of DNA repair?
At least five major DNA repair pathwaysbase excision repair (BER), nucleotide excision repair (NER), mismatch repair (MMR), homologous recombination (HR) and non-homologous end joining (NHEJ)are active throughout different stages of the cell cycle, allowing the cells to repair the DNA damage.
What happens when DNA polymerase makes a mistake?
When Replication Errors Become Mutations. Incorrectly paired nucleotides that still remain following mismatch repair become permanent mutations after the next cell division. This is because once such mistakes are established, the cell no longer recognizes them as errors.
Can DNA repair itself if damaged?
Most damage to DNA is repaired by removal of the damaged bases followed by resynthesis of the excised region. Some lesions in DNA, however, can be repaired by direct reversal of the damage, which may be a more efficient way of dealing with specific types of DNA damage that occur frequently.
What vitamin helps with DNA repair?
The enzyme, which requires the B vitamin folate to work properly, plays a key role in synthesizing molecules that go into the nucleotide building blocks of DNA.
Can food change your DNA?
And, according to two new genetic studies, you are what your mother, father, grandparents and great-grandparents ate, too. Diet, be it poor or healthy, can so alter the nature of one’s DNA that those changes can be passed on to the progeny.
How do you treat damaged DNA?
Base excision repair Oxidized bases in DNA are produced in cells treated with Hoechst dye followed by micro-irradiation with 405 nm light. Such oxidized bases can be repaired by base excision repair.
Which vitamin helps with DNA repair which vitamin helps with blood clotting?
Vitamin K is used by the body to help blood clot.
Which vitamin is required for blood clotting?
Vitamin K is a nutrient that the body needs to stay healthy. It’s important for blood clotting and healthy bones and also has other functions in the body. If you are taking a blood thinner such as warfarin (Coumadin®), it’s very important to get about the same amount of vitamin K each day.
What vitamin is good for the blood?
Vitamin B12, like the other B vitamins, is important for metabolism. It also helps form red blood cells and maintain the central nervous system.
What vitamins Cannot be taken together?
Don’t use calcium, zinc, or magnesium supplements at the same time. Also, these three minerals are easier on your tummy when you take them with food, so if your doctor recommends them, have them at different meals or snacks.
Can I take all my vitamins at once?
You can—but it’s probably not a good idea. For some supplements, optimal absorption can depend on the time of day taken. Not only that—taking certain vitamins, minerals, or other supplements together can also reduce absorption and may result in adverse interactions, which can be harmful to your health.
Is it better to take vitamin D every day or once a week?
Oral vitamin D3 can be taken once a day but also with longer intervals because of its long half life, being around 25 days. It is not known whether equivalent doses once a week or once a month are equally effective.