Roll No.
Total No. of Pages : 02
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Total No. of Questions : 09
B.Sc. (BT) (2018 Batch) (Sem.-3)
MOLECULAR BIOLOGY
Subject Code : BSBT-303-18
M.Code : 76610
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Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
- Write briefly :
- Describe the structure of Nucleosome.
- What causes dimerization of Thymine?
- What is sigma factor?
- What is the role of Rho factor in transcription?
- Differentiate Induced and spontaneous mutations.
- Which is the sense strand of DNA?
- What is the role of promoter in a gene?
- What are Base analogues?
- What is the function of DNA polymerase?
- How does penicillin work as antibiotic?
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SECTION-B
- Describe initiation of transcription in E.coli.
- Describe Replication process as it occurs on Leading strand of DNA.
- What are the characteristics of Genetic code?
- Discuss Catabolite repression of Lac operon.
- Explain photoreactivation for repair of mutated DNA.
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SECTION-C
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- Explain the process of Translation in prokaryotes.
- Discuss positive regulation of Lac operon.
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- Write the activities of chemical mutagens.
- How is excision repair of damaged DNA carried out by cell invivo?
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Sc (Biotechnology) 2020 March Previous Question Papers