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IB Biology SL D2.1.5 Dna Replication Prerequisite Questions

DNA replication during interphase produces chromosomes with sister chromatids. The chromatids remain joined at their centromeres until separation. Questions test replication timing, DNA quantity and chromatid counts.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Recognize that paired sister chromatids visible during meiosis result from DNA replication before meiosis.
  • Distinguish G1 and G2 DNA quantity: DNA quantity doubles by G2.
  • Calculate chromatid number after replication from diploid chromosome number; a 2n=16 late-prophase cell has 32 chromatids.

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

[Maximum number: 1]

The diagram shows the stages of the cell cycle.

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

Distinguish between the quantity of DNA of the cell at G1 and G2.

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