List of top NanoScience Questions asked in CUET (PG)

The amino acid having aromatic R group is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : HIV has a higher mutation rate.
Reason (R) : RNA genomes have much higher mutation rate.
In the light of the above statements, choose the most appropriate answer from the options given below :

In Down's Syndrome, there is :

Quinolones act on/interfere the :

Digestive compartment of eukaryotic cells is :

First licensed vaccine generated by reverse vaccinology is :

The opening and closing of stomota is controlled by a hormone called :

Etiological agent of Malaria is a :

How many base pairs are in a haploid set of human chromosomes :

CD in Immunology is :

In which of the following situations, heavier particle has smaller De-Broglie wavelength. If two particles :
A. move with same speed
B. move with same linear momentum
C. move with same kinetic energy
D. have fallen through the same height
Choose the most appropriate answer from the options given below :

Which of the following statements are true about effective mass?
A. Effective mass arises due to interaction of electrons with periodic potential of lattice
B. The curvature of the band determines the electron effective mass
C. Effective mass cannot be negative
D. The calculation of effective mass takes into account the shape of energy bands in 3-D k-space
E. Effective mass of an electron is given by $m^* = \frac{\hbar}{\left(\frac{d^2E}{dk^2}\right)}$
Choose the correct answer from the options given below :

Arrange the following in decreasing order of packing fraction :
A. Face centered cubic structure
B. Body centered cubic structure
C. Simple cubic
D. Diamond cubic structure
Choose the correct answer from the options given below :

Choose the correct order of steps involved in Chemical Vapour Deposition (CVD) technique :
A. Heterogenous surface reaction catalysed by the surface
B. Nucleation and growth of film
C. Transport of reacting gases and their adsorption to the surface
D. Surface diffusion of the species to growth sites
E. Desorption and transportation of gaseous reaction products away from the surface
Choose the correct answer from the options given below :

Arrange the following systems in decreasing order of number of lattices in it.
A. Triclinic
B. Orthorhombic
C. Tetragonal
D. Cubic
Choose the correct answer from the options given below :

The average energy of an electron is related to Fermi energy (at absolute zero) as :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : FCC lattice has higher packing fraction than simple cubic lattice.
Reason (R) : FCC contains less atoms per unit cell than simple cubic.
In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Gallium Arsenide (GaAs) is a direct-band gap semiconductor and GaP is an indirect - band gap semiconductor.
Reason (R) : In GaAs, top of valence band and bottom of conduction band are both at the same center point in Brillioun Zone, while in GaP top of the valence band is at a different position from the bottom of conduction band in Brillioun Zone.
In the light of the above statements, choose the most appropriate answer from the options given below :

In Quantum dots, the energy levels resembles to those of :

Arrange the following type of electromagnetic waves according to increasing order of their wavelengths :
A. Gamma rays
B. Infrared rays
C. Visible rays
D. Ultraviolet rays
E. Radio waves
Choose the correct answer from the options given below :

A Carnot engine operates between the temperatures 850 K and 300 K. The engine performs 1200 J of work each cycle, which takes 0.25 s. The efficiency of this engine is :

Under what condition, the diffraction from the lattice will not occur :

When a semiconductor is doped with pentavalent impurities, the Fermi level (at moderate temperatures) lies :

Which of the following correctly represents the density of states D(E) for quantum well :
(Here, $K_o, K_1, K_2, K_3$ are constants; $d_i$ are degeneracies; $E_{iw}$ energy of level "$i$" in potential well)

In quantum well, electrons are confined in :