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

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Question 13

An analysis of a double-stranded DNA plasmid from a halophilic archaeon reveals that cytosine accounts for 23% of the total nitrogenous bases. What percentage of the bases in this plasmid are adenine?

A

23%23\%23%

B

54%54\%54%

C

27%27\%27%

D

46%46\%46%

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)?

72 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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