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

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Question 55

In a double-stranded sample of DNA, 22% of the nitrogenous bases are cytosine (C).

What are the expected percentages of the other bases in this sample?

A

Adenine (A) 28%28\%28%, Guanine (G) 22%22\%22%, Thymine (T) 28%28\%28%

B

Adenine (A) 22%22\%22%, Guanine (G) 28%28\%28%, Thymine (T) 28%28\%28%

C

Adenine (A) 28%28\%28%, Guanine (G) 28%28\%28%, Thymine (T) 22%22\%22%

D

Adenine (A) 22%22\%22%, Guanine (G) 22%22\%22%, Thymine (T) 34%34\%34%

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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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