Crfticol Thinking Quesllions i. Which bases pair with ene another in DNA Model1

Question

Crfticol Thinking Quesllions i. Which bases pair with ene another in DNA Model1 Complmventary ONA SYands Clanlity eah be as either purine or each of these pain rd is the name of the sugar found in n DNA to eac What is the name of the monomer that makes the DNA mert lud c oasts ineT4. Are Hew do you knousrand S. List the intermolecular forces that are important in stabliting the double helical structure. Indicate with a which forceis) are more important. Do not dwell on this. Prior to the elucidation of the structure of DNA by Watson and Crick in 1953, Charga noted that the total amount of A+ G in DNA is equal to the total amount of C+ T, segardless of the source of the DNA. Explain the structural basis of this observation, knowing what we know now about the strecture of DNA. 6. 82

Explanation / Answer

1) Adenine pairs with thymine and guanine with cytosine. Adenine and guanine are purines whereas thymine and cytosine are pyrimidines.

Adenine and thymine have 2 H-bonds between them whereas guanine and cytosine have three.

2) Deoxyribose

3) Nucleotide

4) complementary strands are antiparallel.

5) H-bonds and vander Waal's forces are important for stabilizing double helical structure of DNA.

6) As each purine bonds to a pyridine, sum of number of purine bases is equal to sum f number of pyrimidine bases.

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