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The diagrams below represent examples of three levels of structure with respect to the folding and assembly of a protein - VCE - SSCE Biology - Question 1 - 2015 - Paper 1

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The diagrams below represent examples of three levels of structure with respect to the folding and assembly of a protein. The diagrams are not to scale. A. alpha-he... show full transcript

Worked Solution & Example Answer:The diagrams below represent examples of three levels of structure with respect to the folding and assembly of a protein - VCE - SSCE Biology - Question 1 - 2015 - Paper 1

Step 1

Complete the table below to indicate the diagram that represents the structural level of the protein given.

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Answer

  1. Primary: C
  2. Secondary: A
  3. Tertiary: B

In the table:

  • Primary structure is represented by diagram C, which shows a polypeptide sequence.
  • Secondary structure is represented by diagram A, which illustrates the alpha-helix formation of proteins.
  • Tertiary structure is represented by diagram B, which depicts the three-dimensional shape of the human interferon protein.

Step 2

Name the molecular sub-unit of a protein.

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Answer

The molecular sub-unit of a protein is an amino acid.

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