BSc Botany Sem III 2017 2018 2018 Botany Paper II Question Paper - Mumbai University | munotes

Questions asked in this paper

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• 2. Figures to the right indicate marks

1. Q3 Draw neat and labelled diagrams wherever necessary
2. Q1 A) Choose the correct option from the following: 10 marks
   • i) The two sub units of prokaryotic ribosomes are
   • ii) During which stage of prophase-I, crossing over takes place ‘
   • iii) Which of the following type of DNA is left handed helix
   • iv) Crossover suppressing characterstic is shown by chromosomal aberration
   • v) Inreptiles and fishes method of sex determination is found
   • vi) The daughters of aman who is colour blind and a women who is homozygous dominant normal vision will be
   • a) Colour blind b) Carrier c) Normal vision d) Colour blind and carrier
   • vii) Evidence of cytoplasmic inheritance in Mirabilis jalapa was first reported by
   • viii) Messelson & stahl used bacterium in their experiments
   • ix) protein binds to single - stranded DNA, and prevents it from forming duplex DNA
   • x) Synthesis of strand of DNA involves formation of series of discontinuous short segments of nucleotides called okazaki fragments
   • B) Answer the following in one or two sentences. 10
   • i) What is karyokinesis ?
   • ii). What is the function of peroxisome?
   • iii) Name the two types of inversion
   • iv) What is the significance of cytoplasmic male sterility?
   • v) What do you mean by replicon?
   • Q.P. Code :19593
3. Q2 Answer any two of the following: 20 marks
   • i) Describe the ultra structure of mitochondria. Add a note on its function
   • ii) Describe the structure of t-RNA. Add a note on its function
   • iii) Describe B and C forms of DNA
   • iv) Define meiosis. Give a detailed account of prophase - I of meiosis — I
4. Q3 Answer any two of the following: 20 marks
   • i) What are chromosomal aberrations? Discuss duplication with reference to their origin and genetic significance in Drosophila
   • ii) Explain the methods of sex determination in homogametic females with the help of a
   • iii) What is sex-linked inheritance? Explain it with reference to haemophilia in human beings
   • iv) Explain Cytoplasmic inheritance in Mirabilis jalapa
5. Q4 Answer any two of the following: 20 marks
   • i) Explain the role of various enzymes involved in Eukaryotic DNA replication
   • ii) Describe how Messelson-Stahl’s experiment proved that DNA replication is semi
   • iii) Describe briefly the molecular mechanism of DNA replication in prokaryotes
   • iv) Explain the process of transcription in eukaryotes
6. Q5 Write short notes on any four. 20 marks
   • i) Telophase
   • ii) Z-DNA
   • iii) ZO-ZZ type of sex determination
   • v) Translocations

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