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3.2 DNA and protein synthesis

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Question 9
F

A student builds a model of two DNA strands coiled into a double helix. The model contains 80 base pairs. Each nucleotide is represented by one sugar piece, one phosphate piece and one base piece.

The student has 80 sugar pieces, 160 phosphate pieces and 160 base pieces.

Which additional pieces are needed to complete the model?

[1]
A

80 sugar pieces only

B

80 phosphate pieces only

C

80 base pieces only

D

80 pieces of each type

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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