Q4. Assertion: a protein loses many of its biological activities if its tertiary structure is destroyed. Reason: tertiary structure is absolutely necessary for many biological activities of proteins. Are both true, and does the reason explain the assertion?
Both are true, and the reason explains the assertion (NCERT page 112).
Q5. Name two bonds that NCERT’s Figure 9.3 shows holding a protein’s tertiary structure.
Hydrogen bonds and disulphide bonds (NCERT page 112).
Q6. Give two of NCERT’s examples of how subunits can be arranged in a quaternary structure.
A linear string of spheres, and spheres arranged one upon another in the form of a cube or plate (NCERT page 112).