A1.2 Nucleic acids

A1.2 Nucleic acids Quiz

IB Biology HL: Quiz

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5 questions, one answer each

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  1. 1. Which bond forms the backbone of a nucleic acid strand?

    • A. Hydrogen bonds between bases
    • B. Covalent sugar–phosphate bonds
    • C. Peptide bonds
    • D. Ionic bonds

  2. 2. HL: New DNA strands are synthesised:

    • A. 3' to 5'
    • B. 5' to 3'
    • C. In either direction
    • D. From the middle outwards

  3. 3. HL: In a nucleosome, how many histones form the core?

    • A. Two
    • B. Four
    • C. Eight
    • D. Nine

  4. 4. HL: In the Hershey–Chase experiment, which label entered the bacteria?

    • A. ³⁵S
    • B. ³²P
    • C. Both equally
    • D. Neither

  5. 5. HL: DNA from one species has 30% adenine. What percentage is guanine?

    • A. 20%
    • B. 30%
    • C. 40%
    • D. 70%

Quiz