Question

1. Arecord player needle watching the surface of a record The Oscation of a diving board is response to a d. All of the above 15. Of the following which are NOT uses of parties in Boy Sensors to detect pathogens of the molecules Delivery of pharmaceuticals Tumor destruction by Chemical means d. All of the wbove actually are uses of nanoparticles None of the above are use of nanoparticles 16. Which of the following are advantages of g rescent nanoparticles over forescent Nanoparticles can be targeted to specific de Cat Nanoparticles do not photobeach the way dyes can, thus they can be used long c. Botha and bare advantages d. Neither a nor Dare dvantages ? 17. The use of nanoparticles to deliver medicine, RNA, ONA O proteins may involved The use of positively charged molecules to neutrale negative changes of the The use of chitosan to make a biocompatible nanosh c. The use of cellulose to make a biocompte renshell d. All of the above e. Some of the above 18. in developing nanoparticles for use in cancer therapy, one should consider a. Delivering chemicals to cancer cells but not healthy is b. Keeping medicine from leaking out of cells C Botha and bare correct d. Neither a norbis correct 19. Semiconductor nanowires can be "biosynthesized by a. Using phage display to place Cds or Z5 binding peptide on the surface b. Using a filamentous phage such as M3. c. Allowing arrays of nanocrystals to form. d. All of the above are steps in creating semiconductor nanowires e. Some of the above are steps in creating semiconductor nanowires. 20. Mognefospirilum magnetotocticum naturally produces magnetic nanoparticles. These magnetome protein are useful in nanotechnology for a. Orienting the cell towards magnetic north b. Purifying fused proteins by magnetic separation c Cloning genes from E. coli. d. They are of no use. 21. All of the following are properties of antibacterial nanocarpets EXCEPT a. Nanocarpets are capable of changing color and killing bacteria. b. The lipid molecules in nanotubes are able to kill bacteria by themselves. c. Only one color can be seen in response to various stimuli d. Eventually nanocarpets may also be used as biosensors 22. The development of ion channel nanosensors involves the use of a. Gramicidin A to make the ion channel. b. Method to measure change in current or pH.

Answer 1

Ans. All of the above are generally the uses of nanoparticles in biology

Nanoparticles are particles having sizes in the nanometer dimensions (1-100 nm)..

Nanoparticles containing anti-cancerous drug molecules like interlukin, are bound to T cells. Whenever the T cells reach the tumor, drug molecules are released. This inhibits tumor growth.

Nanoparticle based sensors can be used to detect even miniscule amounts of chemicals by measuring changes in the resistance or capacitance. Carbon nanotube containing biosensors have been developed which can monitor the levels of NO in blood.

Liposomes, which are spherical, sac like structures which consists of phospholipids are used as carriers for drug molecules.