What are the characteristics of DNA double helix? I - The two strands are antiparallel, that is, they are in opposite directions. II - The nitroge...
What are the characteristics of DNA double helix?
I - The two strands are antiparallel, that is, they are in opposite directions.
II - The nitrogenous bases are in the center of the helix and are linked by hydrogen bonds.
III - The pairing of complementary bases occurs randomly.
IV - The DNA molecule is considered small, with approximately one billion base pairs.
a) I and II are correct.
b) II and IV are correct.
c) I, II, and IV are correct.
d) Only III is correct.
I - The two strands are antiparallel, that is, they are in opposite directions.
II - The nitrogenous bases are in the center of the helix and are linked by hydrogen bonds.
III - The pairing of complementary bases occurs randomly.
IV - The DNA molecule is considered small, with approximately one billion base pairs.
a) I and II are correct.
b) II and IV are correct.
c) I, II, and IV are correct.
d) Only III is correct.
💡 1 Resposta
Ed 
As características da dupla hélice do DNA são: I - As duas fitas são antiparalelas, ou seja, estão em direções opostas. II - As bases nitrogenadas estão no centro da hélice e são ligadas por pontes de hidrogênio. III - O pareamento das bases complementares ocorre de forma específica (A com T e C com G). IV - A molécula de DNA é considerada grande, com aproximadamente um bilhão de pares de bases. Portanto, a alternativa correta é a letra "a) I e II estão corretas".
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