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

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Question 3

A researcher compares two DNA samples.

DNA sampleTotal number of basesBases that are adenine (A)
X18 00018\,0001800032%
Y12 00012\,0001200021%

The researcher concludes that sample X contains more guanine (G) bases than sample Y because sample X contains more bases in total.

Evaluate the researcher's conclusion. Show your calculations.

[4]
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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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