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Cellular control

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Question 4

In mammalian cells, the primary mRNA transcript transcribed from the CALC CALC\,CALC gene can be processed in two distinct ways. In thyroid cells, exons 1–4 are joined to produce the mature mRNA for calcitonin. In neural cells, exon 4 is skipped, and exons 1–3 are joined directly to exons 5 and 6 to produce the mature mRNA for calcitonin gene-related peptide (CGRP).

At which level of control is gene expression being regulated in this pathway?

A

Transcriptional

B

Post-transcriptional

C

Translational

D

Post-translational

Markscheme

Cellular control Questions

  1. A Level
  2. /Biology
  3. /Cellular control

30 exam-style questions on OCR A A Level Biology Cellular control. Each one has a worked solution and a mark scheme showing where the marks go.

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