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 rate of degradation and microbes resistance to toxic pollutants remain better when the
A. mixed cell population is used
B. individual cell is used
C. mixed cell population along with metals is used
D. individual cell along with metal is used
2. pBR 322 has/have which of the following selection marker(s)?
A. Ampr
B. Tetr
C. Both A and B
D. Kanr
3. Spirit vinegar is produced from
A. fruit juices
B. malted grain
C. ethanol
D. ale
4. Transmission of a gene from male parent to female child to male grand child is known as
A. holandric inheritance
B. quantitative inheritance
C. criss-cross inheritance
D. maternal inheritance
5. 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
6. Which of the following microorganisms leach metals out of rock ores and can accumulate silver?
A. Pseudomonas aeruginosa
B. Thiobacillus
C. Pseudomonas putida
D. Zoogloea ramigera
7. The disorder in which of the following may cause "Ehlers-Danlos Syndrome"?
A. Dlashin protein
B. Collagen protein
C. Fibrin protein
D. Globulin protein
8. In the meiotic cell divison in daughter cells are produced by two successive division in which
A. first division is equational, second is reductional
B. first division is reductional and second is equational
C. both divisions are reductional
D. both divisions are equational
9. Which of the protein is involved in Alzheimer's disease?
A. A4
B. Amylin
C. Fibrin
D. Alzhemin
10. Vinegar is typically produced in fed batch reactors because
A. a fed batch reactor can be used to maintain low acetic acid concentrations
B. a fed batch reactor can be used to maintain low ethanol concentrations
C. acetic acid bacteria tend to ferment at high ethanol concentrations
D. all of the above
11. Which of the following is not true about the helper plasmids?
A. These can replicate in Agrobacterium
B. These help in the mediating conjugation of intermediate vectors
C. These can't replicate in Agrobacterium
D. All of the above
12. 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
13. Which of the following vector can maintain the largest fragment of foreign DNA?
A. YAC
B. Cosmid
C. Plasmid
D. Phage
14. Which group of land plants is most restricted to moist environments?
A. Lycophyta
B. Sphenophyta
C. Bryophyta
D. Angiosperms
15. The spindle forms in the
A. G1 phase
B. G2 phase
C. M phase
D. S phase
16. Sugar content of the fermentation medium for citric acid is maintained at
A. 10-15%
B. 15-20%
C. 20-25 %
D. 25-30 %
17. Which of the following is the word used to describe what happens when the nucleus of a sperm joins with the nucleus of an egg cell?
A. Sex
B. Fertilisation
C. Intercourse
D. Reproduction
18. Recalcitrant seeds are
A. resistant to drying and freezing temperature
B. killed by drying and freezing temperature
C. both A and B
D. none of above
19. Which phase of mitosis is associated with chromosomes aligned at the center of the cell and centromeres divide?
A. anaphase
B. interphase
C. metaphase
D. prophase
20. 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
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