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IB Biology HL 1.1.7 Leading vs. lagging strand Question Bank

Practise IB Biology HL 1.1.7 by applying leading vs. lagging strand concepts to exam-style questions.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • identify the relevant biological structure, process or evidence
  • apply the correct biological mechanism to the question
  • evaluate the result using data, adaptation or ecological reasoning

D1.1.7 (HL)—Leading vs. lagging strand question 1

[Maximum number: 1]

What is a difference between the leading and lagging strands in DNA replication?

A

Fewer Okazaki fragments are produced on the leading strand.

B

Exons are only produced on the lagging strand.

C

More RNA primers are assembled on the lagging strand.

D

DNA nucleotides are linked 5′5^{\prime} to 3′3^{\prime} on the leading strand and 3′3^{\prime} to 5′5^{\prime} on the lagging strand.

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