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

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Question 2
F

The Figure shows a short section of a DNA molecule.

Figure

image

a.

Use words from the list to complete the sentences.

chromosome double helix gene nucleotides strands

DNA is made of two ____________ that are twisted together to form a ____________.

DNA is a polymer made of many repeating units called ____________.

[3]
b.

Name the part labelled X.

[1]
c.

The letter of base Z is missing from the Figure.

Write the letter of base Z.

[1]
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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