Test Your Knowledge - Free MCQ PRACTICE
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DRIVINGTEST
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 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

2. Auxanometer is used for measuring
A. respiratory activity
B. photosynthetic activity
C. growth activity
D. osmotic pressure

3. 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

4. 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

5. 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

6. 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

7. A(n) __________ is an excised piece of leaf or stem tissue used in micropropagation.
A. microshoot
B. medium
C. extant
D. scion

8. The Southern blotting technique depends on
A. similarities between the sequences of probe DNA and experimental DNA
B. similarities between the sequences of probe RNA and experimental RNA
C. similarities between the sequences of probe protein and experimental protein
D. the molecular mass of proteins

9. What is the normal role of restriction endonucleases in bacterial cells?
A. To degrade the bacterial chromosome into small pieces during replication
B. To degrade invading phage DNA
C. To produce RNA primers for replication
D. All of the above

10. The evaporation of water from leaves is called
A. transpiration
B. cohesion
C. tension
D. pressure flow

11. 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

12. pH of the fermentation medium for chlorotetracyclins is
A. 5-6
B. 6-7
C. 7-8
D. 8-9

13. pBR 322 has/have which of the following selection marker(s)?
A. Ampr
B. Tetr
C. Both A and B
D. Kanr

14. 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

15. Problems in obtaining large amounts of proteins encoded by recombinant genes can often be overcome by using
A. BACS
B. expression vectors
C. YACS
D. all of these

16. Ethanol is produced by
A. continuous fermentation
B. batch fermentation
C. both A and B
D. none of these

17. Which of the following is considered as the disadvantage of conventional plant tissue culture for clonal propagation?
A. Multiplication of sexually derived sterile hybrids
B. Less multiplication of disease free plants
C. Storage and transportation of propogates
D. Both B and (c)

18. Bar eye character of Drosophila is due to
A. duplication in region of 16A of X chromosome
B. deletion in region of 16A of X chromosome
C. due to presence of additional X-chromosome
D. due to a point mutation in eye-locus

19. 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

20. 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

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