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IB
D1.1 DNA replication

IB Biology Topic D1.1: DNA Replication Questionbank

IB Biology Topic D1.1 DNA Replication Questionbank… | RevisionDojo

D1.1 DNA replication

D1.2 Protein synthesis

D1.3 Mutations and gene editing

D2.1 Cell and nuclear division

D2.2 Gene expression (HL)

D2.3 Water potential

D3.1 Reproduction

D3.2 Inheritance

D3.3 Homeostasis

D4.1 Natural selection

D4.2 Sustainability and change

D4.3 Climate change

Paper

Level

Question

SLPaper 1A

During DNA replication, which pairing is correct due to complementary base rules?

A–C and G–T

A–T and G–C

A–U and C–G

A–G and T–C

Question

SLPaper 1A

What do mitosis and meiosis both require before they begin?

SLPaper 1A

Which statement explains why Taq polymerase is preferred in PCR?

SLPaper 1A

What is the main role of DNA polymerase?

SLPaper 1A

A mutation causes DNA polymerase to lose proofreading ability. What is the most likely consequence during replication?

IB Biology Topic D1.1 DNA Replication Questionbank

Practice IB Biology Topic D1.1 DNA Replication with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for D1.1 DNA Replication and mirrors Paper 1A, 1B, 2 style where relevant.

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Synapsis of homologous chromosomes

Formation of polar bodies

DNA replication

Unequal cytokinesis

It is faster than human DNA polymerase

It works best at low temperatures

It resists denaturation at high temperatures

It digests RNA fragments

Breaking hydrogen bonds

Adding nucleotides to form a new DNA strand

Synthesizing RNA primers

Separating double-stranded DNA

DNA strands will fail to unwind

More replication forks will form

Replication will continue, but base sequence accuracy will decrease

Semi-conservative replication will no longer occur

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