CAIE A-Level Biology AS 6.1.4 Dna Double Helix Structure Questions

Explain DNA double-helix structure, complementary base pairing and hydrogen bonding using evidence from each question and mark scheme.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • Explain the structure of the DNA double helix, including complementary base pairing and hydrogen bonding.

CAIE A-Level Biology AS 6.1.4 Dna Double Helix Structure Questions question 1

[Maximum number: 1]

How many phosphodiester bonds are present in a circular DNA molecule of 2700 base pairs?

A

2699

B

2700

C

5398

D

5400

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