LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

ED 10

FIFTH SEMESTER – November 2008

PB 5512 – PLANT BIO-TECHNOLOGY

 

 

 

Date : 10-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART –A                                       (20 marks)

 

1. Choose the correct answer (5×1=5)

1. The sugar used in MS medium is

1. Sucrose b. Maltose c. Galactose       d. Glucose

 

1. The fusogen used in protoplast fusion  is

1. PEP b. PEG c. KNO₃         d. PVP

 

1. The type of DNA present in the chloroplast is

1. ss linear DNA b ds linear DNA   c. ds circular DNA    d. ss circular DNA

 

1. The tracking dye used in electrophoresis is

1. Bromophenol blue b. Bromocresol blue
2. Bromothymol blue d. Bromoazol blue

 

1. The organism used as bioinsecticides for cotton is

1. Bacillus thruemgensis b. Bacillus polymyxa
2. Bacillus subtilis d. Bacillus cereus

 

1. State whether the following statements are True or False (5×1=5)

 

1. Cytokinins are the hormones used for shoot induction.

 

1. nod genes are present in the legume nodules.

 

1. Somatic embryo can be initiated by absisic acid.

 

1. Meristem is considered as the region free of microbes.

 

1. Western Blotting is used for DNA separation.

 

III. Complete the following                                                                      (5×1=5)

 

1. ______________ is an unorganised mass of cells.

 

1. RAPD can be expanded as ______________________________.

 

1. Cryopreservation is carried out at ____________°C temperature.

 

1. Ti plasmid is responsible for production of the hormones like______________.

 

1. The enzyme used in PCR is_______________ polymerase.

 

IV Answer the following within 50 words                                       (5×1=5)

     Write short notes on

 

1. IBA

 

1.  Somaclonal variation

 

1. Embryo culture

 

1. Particle gun bombardment

 

1. Transgenic plants

 

PART – B

Answer any FIVE of the following in about 350 words                       (5×8=40)

 

1. Write the procedure followed for induction of shoot and root.
2. Explain somatic hybridisation.
3. Describe the mitochondrial genome and its function.
4. Describe electrophoresis of RNA
5. Explain the concept of molecular probes.
6. Elaborate on selection markers and their uses.
7. Describe the scope and history of Plant Tissue culture.
8. What are Ti plasmids? Explain the molecular mechanism involved in transformation                       with Ti plasmid.

 

PART-C

Answer the following in about 1500 words                                          (2X20=40)

 

29. a. Write in detail the in vitro culture of plants using hormone.

OR

1. Describe organ culture and add a note on artificial seeds.

 

1. a. Explain the use of gene mapping and molecular markers in crop improvement.

OR

1. Discuss in detail the organisation of plant genome, mitochondrial DNA

and chloroplast |DNA.

                                                 

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