Range of osmolarity tolerated/accepted in mOsm/Kg of H2O by mammalian cells is A. 150-300 B. 280-360 C. 300-325 D. 360-400 Disaggregating of cells can be achieved by A. physical disruption B. enzymatic digestion C. treating with chelating agents D. all of the above Accumulation of lactate leads to A. increase in pH B. no change in pH C. reduction in the pH of culture hence loss of cell viability D. no loss of cell viability.....

If the RBC of human were kept in 0.9% NaCl solution, what sort of change will occur to RBC? A. Cell will Burst B. Cell will shrink C. No change to RBC D. RBC will destroy... Which of the modification in hemoglobin is the cause of sickle cell anemia? A. A mutation in the beta chain B. A deletion in the beta chain C. Replacement of the B chain by D chain D. None of the above... Klinefelter syndrome is a manifestation of which chromosome aneuploidy? A. XXX B. XYY C. XXY D. None of these....

Pollination is the process by which plants transfer male sex cells from one plant to another. How does the nucleus of the male cell reach the female cell? A. It travels on the legs of bees and sticks to the egg cell B. The pollen grain grows a pollen tube and the nucleus travels down the pollen tube to reach the egg cell C. It blows in the wind D. None of the above When a gardener takes a cutting from a plant, indicating that he has made a A. clone B. mutation C. new species D. new variety Single stranded circular RNA encapsidated with a larger RNA in a plant virus is A. a virion B. a viroid C. a virusoid.....

A micro array is an ordered array of microscopic elements on a planer substrate that allows the specific binding of A. gene or gene products B. whole genome C. both (a) and (b) D. none of these... Biochips are made up of A. semi-conducting molecules inserted into the protein frame work B. conducting molecules inserted into the protein frame work C. non-conducting molecules inserted into the protein frame work D. any of the above.... Hypoxanthine can be measured by A. hypoxanthine sensor B. amorphous silicon ISFET C. urea sensor....

Resistance to sulphonyl urea compounds in transgenic tobacco plant has been developed by the transfer of A. gene for EPSPS (5-enol-pyruvyl shikimat 3 phosphate synthase) B. gene for ALS (acetolactate synthase) C. gene for GS (glutamine synthase) D. any of the above... In transgenic plants that have been manipulated to express patho-genesis-related (PR) proteins all the time it has been shown that A. these provide no protection at all against pathogens B. expression of one PR protein provides high levels of protection against many pathogens C. expression of two PR proteins provides some protection against a few pathogens D. these proteins trigger the production of other antimicrobial defenses... For developing herbicide resistance in transgenic plants which of the following approach/(es) is/are used? A. Target molecule is made insensitive to herbicide B. Target protein is overproduced C. A pathway should be introduced that detoxify the herbicide.

Resistance to glyphosphate in transgenic petunia plants has been developed by the transfer of A. gene for EPSPS(5-enol-pyruvyl shikimat 3 phosphate synthase) B. gene for ALS (acetolactate synthase) C. gene for GS (glutamine synthase) D. any of the above Which of the following compounds has been produced in transgenic plants to improve tolerance to salt stress and water deficit? A. Sucrose B. Mannitol C. Nicotine D. Octopine Expression of antisense RNA in transgenic plants is a general method used to A. activate the expression of all genes in a biochemical pathway B. eliminate the expression of all genes in a biochemical pathway C. block the expression of virus coat protein genes....

The first field tests were conducted with which of the following genetically altered organism? A. bt Corn B. Vaccinia virus containing a gene from the rabies virus C. The flavrsavr tomato D. Strawberry seedlings sprayed with ice-minus bacteria The delayed ripening tomato was created by a biotechnologist who __________ a gene. A. altered B. silenced C. replaced D. relocated Antisense technology A. selectively blocks expression of a gene B. combines genetic material from different species C. combines organelles and cells...

Which of the following gene is transferred to plants that detoxify the herbicide atrazine? A. Nitrilase B. Glutathione S-transferase (GST) C. Phosphinothrium acetyl transferase D. All of these Which of the following self-pollinating plant/(s) tend to be homozygous? A. Peas B. Tomato C. Peach D. All of these Which cell-based plant technology involves the combining of two cells without cell walls from different species? A. Clonal propagation B. Cybridization C. Protoplast fusion....

Plants derived sexually from the same plant are____ while those derived from somatic tissue from the same plant are____. A. identical, different B. different, also different C. different, identical D. plants cannot be derived from somatic tissue Transgenic plants with increased tolerance to aluminum have been produced by making plants that A. secrete phytosiderophores into the soil B. make more metal-binding peptides like phytochelatins C. bind aluminum to the cell wall D. secrete citrate into the soil Transplastomics A. targets genes in the chloroplast B. provides exceptionally low yields of protein products C. produces genes that are released in pollen....

In a __________ protocol, bacteria with engineered abilities to detoxify pollutants are intentionally released in an area. A. microcosm establishment B. mibridization C. bioremediation D. rhizosecretion The controversy regarding the use of Bt corn is that it A. is potentially harmful to monarch butterflies B. is a potential allergen to humans C. both (a) and (b) D. can contaminate groundwater Metabolic interference is a term used to describe a method to metabolize a compound and prevent the synthesis of something that is normally produced. What compound(s) have been targeted for metabolic interference in tomato? A. ACC (1-aminocyclopropane-1-carboxylic acid) B. SAM (S-adenosylmethionine) C. Both (a) and (b)....