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

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Question 21

A conservation laboratory examines DNA recovered from an otter hair. The results show that adenine (A) and thymine (T) together make up 62% of the bases.

What percentage of the bases is cytosine (C)?

[1]
A

31%31\%31%

B

38%38\%38%

C

19%19\%19%

D

9.5%9.5\%9.5%

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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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