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. In case of incomplete dominance, the phenotypic ratio of a monohybrid cross will be
A. 1:2:1
B. 3:1:1
C. 1:3:1
D. 1:1:2
2. Final alcohol content in wine varies from
A. 6-9 % by weight
B. 8-13 % by weight
C. both A and B
D. 13-15 % by weight
3. 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
4. Recombinant vaccine for Hepatitis B virus has been synthesized against which of the following antigen?
A. Viral core antigen (HBcAg)
B. Viral surface antigen (HBsAg)
C. e antigen (HBeAg)
D. All of the above
5. For culturing, plasma from the adult chicken is preferred to mammalian plasma because
A. it forms a clear and solid coagulum even after dilution
B. it is too opaque
C. it doesn't produce solid clots
D. it forms a semi solid coagulum
6. Preliminary clinical results with a humanized antibody against the interleukin-2 receptor have suggested the
A. absence of human immune response against murine proteins (HAMA) response
B. presence of HAMA response
C. poor recognition of immunoglobulin, Ig constant regions
D. all of the above
7. 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
8. Which of the following is not true about phagemid?
A. Contain functional origin of replication of the plasmid and ? phage
B. May be propagated as a plasmid or as phage in appropriate strain
C. Contain ? att site
D. Can only be propagated as phage
9. Which is not true about a photon?
A. It is a packet of light energy
B. The shorter the wavelength, the greater the energy of the photons
C. It is trapped by photosynthetic unit
D. It donates electron to reduce carbon dioxide to glucose
10. The yeast generated during the fermentation of beer is generally separated by
A. centrifugation
B. filtration
C. cell disruption
D. all of these
11. 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
12. Which of the following adaptations would it be desirable for a farmer to breed into a crop of wheat?
A. Early ripening
B. Resistance to disease
C. Resistance to pests
D. All of these
13. 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
14. Recombinant adeno virus can be created by deleting E1A/E 1B genes that are
A. transcriptional regulators and are essential for viral replication
B. not necessary for viral replication
C. coding for virus coat protein
D. important for packaging of viral DNA into viral head
15. Phloem is composed of
A. vessel elements and companion cells
B. tracheids and vessel elements
C. sieve-tube elements and companion cells
D. tracheids and sieve-tube elements
16. Diethyl stilbestrol (DES), a synthetic estrogen causes
A. chromosome lagging
B. disruption of mitotic spindle
C. centriole elongation
D. all of the above
17. At normal pH, penicillin remains in
A. aqueous phase
B. solvent phase
C. both A and B
D. precipitates
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. The disorder in which of the following may cause "Ehlers-Danlos Syndrome"?
A. Dlashin protein
B. Collagen protein
C. Fibrin protein
D. Globulin protein
20. Spirit vinegar is produced from
A. fruit juices
B. malted grain
C. ethanol
D. ale
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