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IB Biology HL D2.1.5 Dna Replication Prerequisite Questions

Analyse when DNA replication occurs and how it changes chromatid and DNA quantities before cell division in IB Biology HL D2.1.5.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify S phase of interphase as the stage when DNA replication occurs.
  • Calculate chromatid number after replication from a stated diploid chromosome number.

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Study D2.1.5—DNA replication prerequisite conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D2.1.5 Dna Replication Prerequisite Questions question 1

[Maximum number: 1]

The image shows a cell from the root tip of an onion (Allium cepa) ( 2 n=16 ) during late prophase of mitosis.

Figure for Question IB Biology HL D2.1.5 Dna Replication Prerequisite Questions question 1 — IB Biology HL

How many chromatids are present in the cell?

A

8

B

16

C

32

D

64

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