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

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Question 5

During transcription inside a cell, RNA polymerase synthesises a complementary mRNA strand using a template strand of DNA.

A template DNA strand has the following sequence:

3′-TACGGCATC-5′ 3'\text{-TACGGCATC}\text{-}5' 3′-TACGGCATC-5′

Which of the following represents the correct sequence and orientation of the transcribed mRNA strand?

A

5′-ATGCCGTAG-3′5'\text{-ATGCCGTAG}\text{-}3'5′-ATGCCGTAG-3′

B

5′-AUGCCGUAG-3′5'\text{-AUGCCGUAG}\text{-}3'5′-AUGCCGUAG-3′

C

3′-AUGCCGUAG-5′3'\text{-AUGCCGUAG}\text{-}5'3′-AUGCCGUAG-5′

D

5′-UACGGCAUC-3′5'\text{-UACGGCAUC}\text{-}3'5′-UACGGCAUC-3′

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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