Question 2 of 4intermediate💡 UnderstandShort Answer2 marks

What is meant by tertiary structure of proteins?

Correct Answer

The tertiary structure of proteins refers to the manner in which the long protein chain is folded upon itself like a hollow woolen ball. This folding gives rise to a 3-dimensional view of a protein.

The tertiary structure is absolutely necessary for the many biological activities of proteins. It represents a further level of organization beyond the primary and secondary structures of proteins.

Exercise: EXERCISES | Q: 2 | (Page Page 16)
For More Understanding

Explanation

The textbook explicitly defines tertiary structure as the folding of the long protein chain upon itself like a hollow woolen ball (Fig. 9.3 c). This creates a 3-dimensional view of the protein. The context emphasizes that this structure is essential for biological activities. Students should mention both the structural description (folding like a hollow woolen ball) and its significance (necessary for biological activities) to secure full marks.

Solution Steps

  1. Step 1: Define tertiary structure as the folding of protein chain upon itself like a hollow woolen ball.

  2. Step 2: Mention that it gives a 3-dimensional view of the protein.

  3. Step 3: State that tertiary structure is necessary for biological activities of proteins.

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