Saarland Abitur Biology Practice Questions - Saarland Abitur Biology (Biologie) Exam

What is the basic structure of a DNA molecule?

A double helix composed of two antiparallel strands of nucleotides connected by hydrogen bonds between complementary bases A single strand of amino acids folded into a helix A circular molecule found only in prokaryotic cells with no eukaryotic equivalent A protein complex with no nucleotide component

Correct Answer:

A double helix composed of two antiparallel strands of nucleotides connected by hydrogen bonds between complementary bases

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