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Dna Structure (biology Only) (GCSE Biology)
The following is a GCSE Biology test covering 'Dna Structure (biology Only)' from the broader topic Inheritance, Variation And Evolution. The test is geared towards the AQA exam board style syllabus.Incorrect: 0
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Which of the following is an effect a mutation in a gene might have?
In the DNA double helix, which bases pair together by complementary base pairing?
How many hydrogen bonds normally form between a cytosine and a guanine base pair?
Which nitrogenous base is found in DNA but not in RNA?
Which two components form the backbone of a DNA strand?
DNA strands are described as antiparallel. What does this mean?
Why are some mutations described as beneficial for evolution?
During DNA replication, which enzyme is mainly responsible for adding new nucleotides to a growing strand?
What term describes a stretch of DNA that codes for a single protein?
What is meant by the term “codon” in the context of DNA and protein synthesis?
What is the role of helicase in DNA replication?
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