CAIE A-Level Biology AS 6.1.2 Purines Adenine Guanine Questions
Explain purine structure and complementary pairing for adenine and guanine, using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain the structures and complementary pairing of purines, including adenine and guanine.
CAIE A-Level Biology AS 6.1.2 Purines Adenine Guanine Questions question 1
[Maximum number: 1]
During DNA replication, the use of an incorrect base in the newly synthesised strand can lead to a mutation.
A transversion event is where a pyrimidine is used in the newly synthesised strand instead of a purine, or the other way round.
Name the two possible bases that could be used instead of cytosine in a transversion event.
adenine and guanine ;
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