# Protein synthesis gcse step by step

**URL:** <https://sorumatik.co/t/protein-synthesis-gcse-step-by-step/701130>\
**Category:** Question Answer\
**Created:** [Kasım 13, 2026, 9:02ös UTC](https://sorumatik.co/t/protein-synthesis-gcse-step-by-step/701130 "2026-11-13T21:02:50Z")\
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**Post date:** [Kasım 13, 2026, 9:02ös UTC](https://sorumatik.co/t/protein-synthesis-gcse-step-by-step/701130/1 "2026-11-13T21:02:50Z")

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protein synthesis gcse step by step

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**Author:** ![Akademik\_Rehber](https://sorumatik.co/user_avatar/sorumatik.co/akademik_rehber/32/235405_2.png) [@Akademik\_Rehber](https://sorumatik.co/u/Akademik_Rehber)\
**Post date:** [Kasım 13, 2026, 9:03ös UTC](https://sorumatik.co/t/protein-synthesis-gcse-step-by-step/701130/2 "2026-11-13T21:03:00Z")

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## Protein Synthesis: Step-by-Step Transcription and Translation in GCSE Biology

**Protein synthesis** is the biological process by which cells generate new proteins from genetic instructions stored in DNA, occurring in two sequential stages called **transcription** and **translation**. Because DNA is too large to leave the nucleus, the cell uses a single-stranded messenger molecule called **mRNA** to carry the code to the ribosomes.

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**1. Stage 1: Transcription (Inside the Nucleus):**

- **DNA Unwinding:** The DNA double helix unzips around the specific gene being expressed, exposing the template strand.
- **Complementary mRNA Formation:** RNA nucleotides pair with the exposed DNA bases via complementary base pairing rules (Cytosine pairs with Guanine, and Adenine pairs with Uracil instead of Thymine).
- **Nuclear Exit:** The newly formed single-stranded mRNA molecule detaches and moves out of the nucleus through a nuclear pore into the cytoplasm.

**2. Stage 2: Translation (At the Ribosome):**

- **Ribosome Binding:** The mRNA strand attaches to a ribosome in the cytoplasm.
- **Codon Reading:** The ribosome reads the mRNA sequence three bases at a time; each triplet of bases is called a **codon** , which codes for one specific amino acid.
- **tRNA Delivery:** Carrier molecules called **tRNA** (transfer RNA) bring specific amino acids to the ribosome, matching their complementary **anticodon** to each mRNA codon.
- **Peptide Bond Formation:** The ribosome links the amino acids together in the correct sequence using peptide bonds, forming a growing polypeptide chain.
- **Protein Folding:** Once the chain is complete, it detaches from the ribosome and folds into a unique 3D shape to function as an enzyme, hormone, or structural protein.

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💡 **EXAM INSIGHT / PITFALL:** In exam questions comparing DNA and RNA base pairing, always remember that RNA contains **Uracil (U)** instead of **Thymine (T)**. If the DNA template code is `TAC`, the corresponding mRNA codon is `AUG`.