List of top Biomaterials Questions on Biomaterial and its properties asked in GATE BM

The three curves shown in the figure represent the trends in Stress-Strain relationship in Bone, Glass and Steel. Which one of the following options correctly matches the curve labels (\(P\), \(Q\), and \(R\)) with these three materials?
The shell of a hollow spherical nanoparticle has a uniform thickness of 3 nanometers (nm). The outer radius of the nanoparticle is 5 nm. The ratio of the volume of the shell to the volume of the hollow core is (Round off to one decimal place).
Solid polymeric particles of diameter 20 \(\mu\)m are suspended in water such that the concentration of polymeric particles in the solution is 1% weight/volume (w/v). If the mass density of the polymeric particle is \(1 \text{ g/cm}^3\), the number of polymeric particles present in 1 mL of this solution is \(\times 10^6\).
(Round off to one decimal place)
Based on the stress-strain curves of three different materials (X, Y, and Z) shown in the figure, which one of the following choices is CORRECT?
Which of the following mechanical prosthetic valves were invented as a replacement for diseased heart valves?
An ideal coronary stent should

A novel biomaterial was tested for its tensile properties. The experiment was conducted using a cylindrical sample of this material, which was 10 cm long with 1 cm diameter. When a tensile force of 50 kN was applied, this cylindrical sample elongated by 4 mm. Based on the experimental results described above and the tensile moduli of different tissues given in the table below, this biomaterial would be a suitable replacement for \(\underline{\hspace{2cm}}\). 
\[\begin{array}{|c|c|} \hline \textbf{Tissue} & \textbf{Tensile modulus} \\ \hline \text{Bone} & \text{5 – 20 GPa} \\ \hline \text{Tendon} & \text{0.5 – 1 GPa} \\ \hline \text{Ligament} & \text{20 – 400 MPa} \\ \hline \text{Articular cartilage} & \text{3 – 10 MPa} \\ \hline \end{array}\]

A polymeric scaffold has an initial weight of 20 mg. After 7 days in a lysozyme solution, its weight is reduced to 18 mg. The degradation of the polymeric scaffold after 7 days is \(\underline{\hspace{2cm}}\)%.
As shown in the figure, the water contact angles of surfaces A and B are $\theta_A$ and $\theta_B$, respectively. Based on the figure, which of the following statements given below is TRUE?
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