[Week 2] NPTEL Biomedical Nanotechnology Assignment Answers 2023

NPTEL Biomedical Nanotechnology Assignment Solutions

NPTEL Biomedical Nanotechnology Week 2 Assignment Answers 2023

2. The tendency of nonpolar substances to aggregate in the aqueous solution and exclude water molecules

• Metal Ligand Interaction
• Hydrophobic Interaction
• Hydrophilic Interaction
• Van der Waals Interaction

Answer :- b

2. Name a physical technique used to determine the thermodynamic parameters of interactions in a solution

• TEM
• SPR
• ITC
• FE-SEM

Answer :- c

3. Molecular model of lipid like peptides: A6D can be read as

• peptides have 6 hydrophobic alanine residues from the N-terminus followed by negatively charged aspartic acid residue
• peptides have 6 hydrophobic arginine residues from the N-terminus followed by negatively charged aspartic acid residue
• peptides have 6 hydrophobic alanine residues from the N-terminus followed by positively charged D-lysine residue
• peptides have 6 hydrophobic arginine residues from the N-terminus followed by positively charged D-lysine residue

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Answer :- a

4. Technique used for capturing specific target proteins and mapping their binding epitope containing peptide

• Lin’s technique
• Brown’s technique
• Fen’s technique
• Mark’s technique

Answer :- d

5. Fine grades of (i) polydextran beads are most commonly used for column chromatographic separation of (ii), while medium/coarser grades are required for (iii).
Choose the correct combination:

• i.-Sephadex G550, ii-LUV, iii-SUV
• i.-Sephadex G-50, ii-LUV, iii-SUV
• i.-Sephadex G-50, ii-SUV, iii-LUV
• i.-Sephadex G-550, ii-SUV, iii-LUV

Answer :- b

6. Which of the following is not the top-down technology for fabrication of the bioactive loaded SLNs for food application?

• Emulsification method
• High-pressure homogenization
• Microfluidization
• Membrane contactor method

Answer :- d

7. Molecular communication follows the steps mentioned below as per their order of occurrence:

• Encoding-Sending-Propagation-Decoding-Receiving
• Encoding-Propagation-Sending-Receiving-Decoding
• Encoding-Sending-Propagation-Receiving-Decoding
• Encoding-Propagation-Decoding-Sending-Receiving

Answer :- a

8. Consider the following steps in bacterial chemotaxis:

a. Chemoreceptors transmit information to a central processing system
b. Central processing integrates many inputs and sends a signal to control flagellar motors
c. Attractants/repellents bind to chemoreceptors

Choose the appropriate sequence of events

• c – b – a
• c – a – b
• b – a – c
• b – c – a

Answer :- a

9. The following effects are observed due to the functionalization of carbon nanotubes:
i. Purity enhances
ii. Water solubility decreases
iii. Aggregation of the individual CNTs decreases
iv. Biocompatibility enhances
Choose the incorrect/irrelevant option:

• i, iv
• i, ii
• iii, iv
• i, iii, iv

Answer :- b

10. Assertion (A): Carbon nanotubes are highly soluble in water.
Reason (R): Functionalization of carbon nanotubes has no impact on its water solubility.

• Both A and R are true and R is the correct explanation of A
• Both A and R are true but R is not the correct explanation of A
• A is true but R is false
• Both A and R are false

Answer :- c

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Course Name	Biomedical Nanotechnology
Category	NPTEL Assignment Answer
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NPTEL Biomedical Nanotechnology Week 1 Assignment Answers 2023

1. How many gold atoms lined up in a row would fit in a one nanometer space? (assuming a covalent radius of 0.144nm each)

• None; an oxygen atom is bigger than 1 nm
• Three and a half
• Seven
• Seventy

Answer :- b

2. Nanomaterials are not only human-made materials; can you remember some examples of “non-intentionally made” nanomaterials, i.e. a nanomaterial that you can find in nature?

• Gold nanoparticles
• Viruses
• Nano-transistor
• A bacteria

Answer :- b

3. Which of the following organism give rise to the idea of a ‘smart window’?

• Spider
• Butterfly
• Skeleton flower
• Moth

Answer :- d

4. Scientists have developed nanostructured pillars (without any dopant) based on the wing pattern of insects. When they incubated motile bacterial cells with these structures, they exhibited a bactericidal effect. Which of the following is the appropriate reason for the bactericidal effects of nanostructures?

• Chemical degradation of the bacterial cells
• Physical damage to bacterial cells
• Biochemical reactions on the cell surface when it comes in contact with patterns
• Molecular changes in proteomic level when cells come in contact with patterns

Answer :- b

5. Materials and setup required for silver nanoparticles synthesis by laser ablation methods:

• Silver nitrate, Nd YAG laser, mirror, concave lens, ultra-pure water, CTAB
• Silver nitrate, Nd YAG laser, mirror, ultra-pure water, x-y-z stage, LiAlH4
• Silver slice, Nd YAG laser, mirror, convex lens, ultra-pure water, x-y-z stage
• Silver slice, Nd YAG laser, mirror, concave lens, ultra-pure water, x-y-z stage

Answer :- d

6. Surface plasmon resonance is caused by, and the event is exclusive to, respectively-

• Incoherent oscillation of conduction band electrons by incident light and Metal nanoparticles.
• Coherent oscillation of conduction band electrons by incident light and Polymeric nanoparticles
• Incoherent oscillation of conduction band electrons by incident light and Polymeric nanoparticles
• Coherent oscillation of conduction band electrons by incident light and Metal nanoparticles

Answer :- d

7. Biosynthesis of Cadmium sulphide nanocrystals done by

• Candida glabrata
• Schizosaccharomyces pombe
• Verticillium
• Both Candida glabrata and Schizosaccharomyces pombe

Answer :- d

8. A student incubated viral capsid in phosphate buffer (pH 9) during the nanoparticle synthesis. He observed the size of the capsid before and after incubation using dynamic light scattering. What will be his observation?

• 10% increase of viral dimension
• 10% decrease of viral dimension
• 50% increase of viral dimension
• 50% decrease of viral dimension

Answer :- b

9. What overall charge does the particle acquire in a particular medium called?

• Spectroscopy
• Zeta potential
• Potentiometric
• Electrical conductivity

Answer :- b

10. Assertion(A): The AFM measures the force of attraction between a probe and sample surface.

• Reason(R): Works only on the conducting samples
• Both Assertion and reason are correct
• Only Assertion is correct
• Both assertion and reason are incorrect
• Only reason is correct

Answer :- b

Course Name	Biomedical Nanotechnology
Category	NPTEL Assignment Answer
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