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

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Question 3
Hard

An mRNA molecule is formed by splicing different coding sections (exons) of a pre-mRNA transcript. Suppose a particular gene contains four distinct coding sections: Section 1, Section 2, Section 3, and Section 4.

a.

Explain how altering the order in which these four sections are joined together in the mature mRNA produces a protein with a different structure.

[3]
b.

Calculate the total number of unique proteins that can be formed if all four sections are used exactly once in the mature mRNA molecule.

[2]
c.

Compare the structure and localization of DNA found in eukaryotic cells with that found in prokaryotic cells.

[4]

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

  1. GCSE
  2. /Biology
  3. /What happens in cells (and what do cells need)?