BSc Botany Sem III ATKT BOTANY PAPER II Question Paper - Mumbai University | munotes

Questions asked in this paper

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• 2. Figures to the right indicate full marks

1. Q3 Draw neat and labelled diagrams wherever necessary
2. Q1 A) Choose the correct option from the following and REWRITE the sentence. 10 marks
3. Q1 The two subunits of prokaryotic ribosomes are
   • ii) Pairing of homologous chromosomes is seen during
   • a) Leptotene
   • b) Zygotene
   • c) Pachytene
   • d) Diplotene
   • iii) DNA was first described by Watson & Crick in the year
   • iv) Due to deletion of a segment in chromosome, Cri du chat syndrome is observed in human beings
   • b) 5th
   • v) In Melandrium plant___ method of sex determination is observed
   • a) XX-XO
   • d) ZO-ZZ v1) is of sex influenced character in humans
   • a) Colour blindness
   • c) Baldness
   • d) Eye Colour
   • vii) Streptomycin resistance in Chlamydomonas is an example of. inheritance
   • a) Cytoplasmic
   • b). X-linked
   • c) Multiple allelic
   • d) Polygenic In mode of DNA replication both the daughter molecules have one parental strand and one newly synthesized strand
   • a) Conservative
   • c) Disruptive
   • d) Continuous 1x) protein binds to single-stranded DNA, and prevents it from forming duplex
   • x) The subunit is loosely attached to the core enzyme of RNA polymerase
   • a) alpha
   • b) beta
   • c) sigma
   • d) gamma
   • B) Answer the following in one or two sentences: 10
   • i) What are cristae?
   • ii) What is Karyokinesis? What are duplications with reference to chromosomal aberrations?
   • iv) Give 2 examples of ZO- ZZ type of sex determination
   • v) What do you mean by replicon?
4. Q2 Answer any two of the following: 20 marks
5. Q1 Describe the ultra-structure of prokaryotic ribosome. note on its function Describe the various phases of cell cycle. Add a note on its significance
   • ii) Explain A & Z forms of DNA
   • iv) Describe briefly the structure of m-RNA. Add a note on its function
6. Q3 Answer any two of the following: 20 marks
7. Q1 What are chromosomal aberrations? Discuss translocations with reference to their origin and genetic effects in human beings
   • ii) Explain the methods of sex determination in homogametic females with suitable
   • iii) What is sex linked inheritance? Explain it with reference to eye colour in Drosophila
   • iv) What is cytoplasmic inheritance? Explain it with reference to plastid transmission in
8. Q4 Answer any two of the following: 20 marks
9. Q1 Describe the experiment to prove that DNA replication is semi-conservative
   • ii) Explain the role of various enzymes involved in prokaryotic DNA replication
   • ii) Explain the process of transcription in Prokaryotes
   • iv) Describe the mechanism of m - RNA processing in eukaryotes
10. Q5 Write short notes. (Any Four) 20 marks
    • ii) Significance of mitosis
    • iv) Genic balance theory of sex determination
    • v) Central dogma
    • vi) Male sterility in maize

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