THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA polymerase working on one strand at the same time.
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Unpaired bases always attracting their complementary nucleotides.
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DNA helicase and polymerase are complementary.
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Both strands are identical to each other.
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Detailed explanation-1: -Unpaired bases always attracting their complementary nucleotides. The process of DNA replication within the cells of living organisms begin with the helix being unwound so the two strands are separated. Helicase is responsible for this, separating the strands by breaking the hydrogen bonds between the bases.
Detailed explanation-2: -The new strands formed are complementary to their template strands but also identical to the other template. Therefore, complementary base pairing has a big role in the conservation of the base sequence of DNA.
Detailed explanation-3: -What is responsible for the conservation of the base sequence during DNA replication? DNA polymerase working on one strand at the same time.
Detailed explanation-4: -In a round of replication, each of the two strands of DNA is used as a template for the formation of a complementary DNA strand. The original strands therefore remain intact through many cell generations.
Detailed explanation-5: -Replication relies on complementary base pairing, that is the principle explained by Chargaff’s rules: adenine (A) always bonds with thymine (T) and cytosine (C) always bonds with guanine (G).