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DNA polymerases add nucleotides to the exposed base pairs according to base-pairing rules.

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What is the complementary sequence to the DNA strand TCGATGG?

AGCTACC. Thymine pairs with adenine and cytosine pairs with guanine.


What are the nitrogenous bases for DNA and RNA?

Pyrimidines, which include cytosine, thymine and uracil.andPurines, which include adenine and guanine


What forms a base pair with thymine?

Adenine pairs with thymine.


Where is a molecule split during replication?

At a specific location known as the "replication fork," DNA splits or "unzips" during replication. The split of the double-stranded DNA molecule into two single strands occurs at the replication fork. Due to this division, the replication apparatus may access and duplicate each of the single DNA strands, resulting in the creation of two identical DNA molecules that each include one original and one freshly manufactured strand. DNA replication is necessary for cell division and the genetic information transfer to daughter cells.


If adenine makes up 30 percent of the bases in a DNA helix what percentage of the bases are cystosine?

There are four bases in the DNA double helix: adenine, guanine, cytosine and thymine. An adenine in one strand always pairs with a thymine in the other strand. Similarly, a cytosine always pairs with a guanine. So the number of adenines always equals the number of thymines, and the number of cytosines always equals the number of thymines. The total number of bases must equal 100%. So if 30% of the bases are adenine, another 30% must be thymine because they always pair with each other. Thymine and adenine added together therefore make 60% of the bases. The remaining 40% must be cytosine plus guanine. If the number of cytosines must equal the number of guanines, the percentage of cytosines must be ....... well, you can work it out for yourself!