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1.2 What happens in cells (and what do cells need)?

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Question 39

A researcher records the numbers of each base in one strand of a DNA molecule.

BaseNumber in one strand
Adenine (A)12
Thymine (T)8
Cytosine (C)11
Guanine (G)9

Calculate the percentage of guanine bases in the complete DNA molecule.

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1.2 What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /1.2 What happens in cells (and what do cells need)?

184 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.

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