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. Which protein has been produced generating a transgenic sheep that is used for replacement therapy for individuals at risk from emphysema?
A. Plasminogen activator (tPA)
B. a-anti trypsin (AAT)
C. Casein
D. Amyloid precursor proteins
2. 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
3. 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
4. Which of the following enzyme is used to covalently bond foreign DNA to a vector plasmid?
A. DNA polymerase
B. Restriction endonuclease
C. DNA ligase
D. DNA helicase
5. Encapsulation is necessary to produce and protect synthetic seeds. The encapsulation is carried out by various types of hydrogels, which are
A. soluble in water
B. soluble in organic solvents
C. insoluble in water
D. insoluble in organic solvents
6. 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
7. Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?
A. Nitrospina
B. Nitrobacter
C. Nitrosococcus
D. Nitrosobacter
8. The preserved embryoids are termed as
A. synthetic seeds
B. semi-synthetic seeds
C. natural seeds
D. fermented seeds
9. 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)
10. Klinefelter syndrome is a manifestation of which chromosome aneuploidy?
A. XXX
B. XYY
C. XXY
D. None of these
11. The yield of the antibiotic depends upon
A. pH of the medium
B. age of the inoculum
C. composition of the medium
D. all of these
12. pH of the fermentation medium for chlorotetracyclins is
A. 5-6
B. 6-7
C. 7-8
D. 8-9
13. Difference between ? gt 10 and ? gt 11 vectors is that
A. ? gt 11 is an expression vector
B. ? gt 10 is an expression vector
C. ? gt 10 is a replacement vector
D. ? gt 11 is a replacement vector
14. A genomic library is
A. a database where the sequence of an organism's genome is stored
B. a collection of many clones possessing different DNA fragments from the same organisms bound to vectors
C. a book that describes how to isolate DNA from a particular organism
D. a place where the information of the genetic organization of organisms are kept.
15. Which of the following is used for aeration in a fermentor?
A. Impeller
B. Baffles
C. Sparger
D. All of these
16. Direct DNA uptake by protoplasts can be stimulated by
A. polyethylene glycol (PEG)
B. decanal
C. luciferin
D. all of these
17. The production of high quality and uniform embryos has been limited to only
A. carrot
B. alfalfa
C. both A and B
D. sandalwood
18. Retroviruses have advantage for being used as vector for animal cells because
A. they cover a wide host range
B. infection does not lead to cell death, infected cells produce virus over an indefinite period
C. viral gene expression is driven by strong promoters
D. all of the above
19. 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
20. Human serum albumin has been synthesized by
A. transgenic potato and tobacco plants
B. transgenic maize plants
C. transgenic wheat plants
D. any of the above
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