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

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Question 32
H

One strand of a section of DNA contains 120 adenine (A), 80 thymine (T), 150 guanine (G) and 50 cytosine (C) bases.

How many adenine (A) bases are on the complementary strand?

[1]
A

505050

B

808080

C

120120120

D

150150150

Markscheme

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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