Practice IB Biology Topic A1.2 Nucleic Acids with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for A1.2 Nucleic Acids and mirrors Paper 1A, 1B, 2 style where relevant.
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What allows complementary base pairing to occur between strands of DNA?
In both DNA and RNA, nucleotides are linked together to form a strand. What type of bonding connects the sugar of one nucleotide to the phosphate of the next?
RNA polymers are formed through condensation reactions. Which change occurs at the molecular level during this process?
What links the two strands of DNA together in the double helix?
The stability of DNA is partly due to its sugar–phosphate backbone. What makes this structure chemically stable under physiological conditions?