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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?

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

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

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

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

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

Practise OCR GCSE Biology What happens in cells (and what do cells need)? with exam-style questions for Foundation and Higher tier. 96 questions, matched to the OCR GCSE Biology (J247) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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

  1. GCSE
  2. /Biology
  3. /What happens in cells (and what do cells need)?