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7. The location where the GCR-complex attaches to the DNA is called the glucocorticoid response element (GRE) - VCE - SSCE Biology - Question 7 - 2015 - Paper 1

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7. The location where the GCR-complex attaches to the DNA is called the glucocorticoid response element (GRE). The GRE is located approximately 250 base-pairs upstre... show full transcript

Worked Solution & Example Answer:7. The location where the GCR-complex attaches to the DNA is called the glucocorticoid response element (GRE) - VCE - SSCE Biology - Question 7 - 2015 - Paper 1

Step 1

Name the enzyme that catalyses transcription.

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Answer

The enzyme that catalyses transcription is called RNA polymerase.

Step 2

Name the transcription product, molecule S, and describe the processing that molecule S undergoes before it exits the nucleus.

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Answer

The transcription product, molecule S, is pre-mRNA. It undergoes several processing steps before exiting the nucleus, which include:

  1. Intron removal or exons joined: Introns (non-coding regions) are removed, and exons (coding regions) are joined together.
  2. Addition of a methyl cap: A methyl cap is added to the 5' end of the pre-mRNA, which aids in stability and recognition during translation.
  3. Addition of a poly-A tail: A poly-A tail is added to the 3' end of the pre-mRNA. This tail enhances the stability of the mRNA and aids in its export from the nucleus.

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