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

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Question 17

A museum is making a model of DNA. The model has two sugar-phosphate backbones, with pieces representing adenine, thymine, cytosine and guanine pointing towards the centre.

Which statement describes a correct arrangement of the inward-facing pieces?

[1]
A

Adenine pairs with thymine, and cytosine pairs with guanine.

B

Adenine pairs with guanine, and thymine pairs with cytosine.

C

Adenine pairs with cytosine, and thymine pairs with guanine.

D

Any base can pair with any of the other three bases.

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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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