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3.2 DNA and protein synthesis

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Question 11
F

Two double-stranded DNA fragments each contain 100 base pairs. Fragment P contains 40 adenine bases. Fragment Q contains 60 adenine bases.

Which statement correctly compares the fragments?

[1]
A

P has 20 more cytosine bases and 40 more nucleotides in total.

B

P has 20 fewer cytosine bases and the same number of nucleotides.

C

P has 20 more cytosine bases and the same number of nucleotides.

D

P has 20 fewer cytosine bases and 40 fewer nucleotides in total.

Markscheme

3.2 DNA and protein synthesis Questions

  1. GCSE
  2. /Biology
  3. /3.2 DNA and protein synthesis

44 exam-style questions on Edexcel GCSE Biology 3.2 DNA and protein synthesis, covering 3.2.1 DNA structure as a polymer, 3.2.2 Genome and gene definitions, 3.2.3 Extracting DNA from fruit, 3.2.4 Base order determines protein shape, 3.2.5 Stages of protein synthesis, 3.2.6 Non-coding DNA variants affecting phenotype, and 3.2.7 Coding DNA variants affecting phenotype. Each one has a worked solution and a mark scheme showing where the marks go.

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