Apurinic sites (ap sites) result from the loss of a ____ in an intact double-helix dna molecule

Biology

1 answer:

Harrizon [31]2 years ago

7 0

Apurinic sites in an intact double helix DNA molecule result from the loss of a nucleotide base.

<h3>What is an apurinic site? </h3>

An apurinic/apyrimidinic/abasic site is a position in a molecule of DNA which lacks any purine or pyrimidine base. These sites are also found in RNA molecules but their frequency is more in DNA molecules.

DNA damage caused by a spontaneous depurination can result in the formation of an abasic site.

In the presence of an abasic site, DNA polymerases cannot function. Thus to maintain the integrity of the genome, these sites need to be repaired.

Two methods to repair are base excision repair and nucleotide excision repair.

You might be interested in

A person without a spleen a) cannot survive. B) cannot synthesize red blood cells. C) cannot synthesize white blood cells. D) ma

DiKsa [7]

<h3>A person without spleen may need antibiotic therapy.</h3>

Explanation:

Spleen destroys worn out red blood cells and provides immunity to the body. Sometimes the spleen may get enlarged, this indicates a infection in the body.

A severe infection in the spleen may need a spleen removal by surgery. any person without a spleen will have a weakened immune system, and may need antibiotic therapy to treat possible infections.

6 0

4 years ago

6. What is the half-life of strontium-90? Explain your answer.IN UR OWN WORDS!! THX:) WILL GIVE BRAINLIEST:) I HAVE ALREADY LOO

lbvjy [14]

Half life is the amount of time for one half of an isotope decay. Strontium-90 under goes a beta decay, which means that it will lose an electron forcing a neutron to turn into a proton. This decay process on Strontium-90 makes it have a half life of 28.8 days.

7 0

4 years ago

Do green houses cause Pollution?

Rudiy27

No, simply based on the fact that they are green and have all positive effects on the environment. Hope this helps :)

8 0

3 years ago

1. Single called organisms are part of the ____ group

maks197457 [2]

Answer:

i think it is A but lmk if it is wrong

Explanation:

8 0

3 years ago

Describe why an enzyme is specific.

34kurt

Answer:Enzymes are highly selective catalysts, meaning that each enzyme only speeds up a specific reaction. ... The molecules that an enzyme works with are called substrates. The substrates bind to a region on the enzyme called the active site. There are two theories explaining the enzyme-substrate interaction.

Explanation:

3 0

4 years ago

Read 2 more answers