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

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Question 36

During protein synthesis, the DNA sequence coding for a protein is transcribed to form mRNA.

A section of a DNA template strand has the following base sequence:

ATGCCGTTAG \text{A\quad T\quad G\quad C\quad C\quad G\quad T\quad T\quad A\quad G} ATGCCGTTAG

What would be the complementary sequence of mRNA transcribed from this section of DNA?

A

TACGGCAATC\text{T\quad A\quad C\quad G\quad G\quad C\quad A\quad A\quad T\quad C}TACGGCAATC

B

UACGGCAAUC\text{U\quad A\quad C\quad G\quad G\quad C\quad A\quad A\quad U\quad C}UACGGCAAUC

C

ATGCCGTTAG\text{A\quad T\quad G\quad C\quad C\quad G\quad T\quad T\quad A\quad G}ATGCCGTTAG

D

AUGCCGUUAG\text{A\quad U\quad G\quad C\quad C\quad G\quad U\quad U\quad A\quad G}AUGCCGUUAG

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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