Test Your Knowledge - Free MCQ PRACTICE
by Saksham Chaudhry : 23-B Model Town, Fatehabad 125050 M: 9810570740, 9810571993
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A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. The tumor phenotype, which can be maintained indefinitely in tissue culture, results from the expression of genes on the
A. T-DNA
B. c-DNA
C. r-DNA
D. m-RNA

2. Inundation involves use of a/an
A. large number of organisms over a short time to suppress/destroy a population
B. organism over a short time to suppress/destroy a population
C. large number of organisms over a long time to suppress/destroy a population
D. organism over a long time to suppress/destroy a population

3. A plasmid can be considered as a suitable cloning vector if
A. it can be readily isolated from the cells
B. it possesses a single restriction site for one or more restriction enzymes
C. insertion of foreign DNA does not alter its replication properties
D. All of the above

4. Diethyl stilbestrol (DES), a synthetic estrogen causes
A. chromosome lagging
B. disruption of mitotic spindle
C. centriole elongation
D. all of the above

5. 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

6. Which of the following from a blood clot stimulates the growth of cells in the healing process?
A. EGF
B. PDGF
C. MPF
D. NGF

7. Which of the following has been confirmed on sugarcane genotypes?
A. Bacilliform virus
B. Cytomegalovirus
C. Varicella-zoster virus
D. Erythrovirus

8. Which of the following is used to check vortex and to improve aeration efficiency in a fermentor?
A. Impeller
B. Baffles
C. Sparger
D. All of these

9. The size of the virulent plasmid of Agrobacterium tumefaciens is
A. 40-80 kb
B. 80-120 kb
C. 140-235 kb
D. >235 kb

10. Virulence trait of Agrobacterium tumefaciens is borne on
A. chromosomal DNA
B. tumour inducing plasmid DNA
C. both chromosomal and plasmid DNA
D. cryptic plasmid DNA

11. When do kinetochore microtubules pull chromosomes towards opposite spindle poles?
A. In anaphase A
B. In anaphase B
C. In metaphase
D. In telophase

12. Sugar content of the fermentation medium for citric acid is maintained at
A. 10-15%
B. 15-20%
C. 20-25 %
D. 25-30 %

13. What are different substrates used for ethanol production?
A. Starch containing substrate
B. Juices from sugarcane or molasses or sugar beet
C. Waste product from wood or processed wood
D. All of the above

14. Vectors are
A. molecules that degrade nucleic acids
B. molecules that help in replication
C. molecules that are able to covalently bond to and carry foreign DNA into cells
D. molecules that protect host cells from invasion by foreign DNA

15. Which of the following technology is used for micro array manufacturing?
A. Photolithography
B. Ink jetting
C. Contact printing
D. All of these

16. Fermentation medium for oxytetracyclin (terramycin) consist of
A. CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3
B. CSL, (NH4)2 SO4, sodium chloride and CaCO3
C. CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3
D. CSL,(NH4)2 SO4, ammonium chloride and CaCO3

17. Human insulin formed by recombinant DNA technology is known as
A. H insulin
B. R insulin
C. humulin
D. huinsulin

18. The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
A. penetrance
B. expressivity
C. inheritance percent
D. environmental influence

19. Nitrogen in the plant cell culture media is provided by either ammonia or nitrate salt. In the media
A. utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise
B. utilization of nitrate cause culture pH to drop while utilization of ammonium cause culture pH to rise
C. utilization of both ammonium and nitrate result in rise in pH
D. utilization of both ammonium and nitrate result in drop in pH

20. 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
D. AOA (aminooxyacetic acid)

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