W.B Civil Service Examination (Main)- 2002
(Optional Papers)
Botany Paper-II
Time Allowed-3 Hours Full Marks-100
Group - A
Answer any three questions
1. Answer any five questions : 4 x 5 = 20
(a) What is a quantum requirement ? Give the quantum requirement of photosynthesis.
(b) What will happen if a sensitive plant is touched by hand ? What type of movement it is ?
(c) What is photochrome ? How it acts in flower initiation ?
(d) What do you mean by energy conversion in photosynthesis ?
(e) What are the two demerits of Munch's Mass flow hypothesis ?
(f) What is apoplast and symplast ?
2. Answer any five questions : 4 x 5 = 20
(a) Give the scientific name of groundnut plant. Mention the parts of plant yielding oil and indicate the climate and soil condition suitable for its cultivation.
(b) What is masticatories ? Give the scientific name of betelnut. Mention the climatic condition and soil for cultivation. What is the chief chemical constituent of the nut that are harmful for health ?
(c) What are the medicinal uses of Ocimum sanctum ? Mention its chemical constituents.
(d) Give the scientific name of "Sal". In which type of forest this plant grows ? Mention its medicinal and other economic uses.
(e) From which part of Madhuca indica the common country liquor is prepared ? Mention the distribution of the plant in India.
(f) Give the scientific name of "Clove". In which state of India it is cultivated ? Which is the main active principal of clove ? Which is the native country of Clove ?
3. Answer any five questions : 4 x 5 = 20
(a) What are the functions of G1, S and G2 ? ,
(b) How many types of code words in living organisms ? How conclusion can be drawn that genetic code is always in triplet form?
(c) What do you mean by monosomy, nullisomy, trisomy and tetrasomy ?
(d) What is segmental allopolyploid ?
(e) What do you know about vectors used in recombinant DNA technology ?
(f) What is wobble hypothesis ?
4. Answer any five questions : 4 x 5 = 20
(a) What are the phases of growth ? What is grand period of growth ?
(b) What is the importance of foliar nutrition ?
(c) What is Emerson enhancement effect ?
(d) Role of Aldolase and pyruvic kinase in glycolysis.
(e) How opening and closing of stomata takes place ?
(f) What is hydrogen ion concentration and buffer solution ?
5. Answer any five questions : 4 x 5 = 20
(a) Describe the abiotic and biotic components of forest ecosystem.
(b) What are non-conventional sources of energy and what are their prospects in India ?
(c) Define environmental complex and enumerate its factors.
(d) What are ecological indicators ? Give an example (plant) of each of the following - (i) Indicator of water pollution, (ii) Indicator of gold rich soil, (iii) Indicator of fire.
(e) What is biological diversity ? Mention its different aspects.
(f) What are the different vertical layers of atmosphere ? What is PAN ? How the photochemical smog is produced in atmosphere ?
Group-B
Answer any two questions.
6. Answer any five questions : 4 x 5 = 20
(a) What is transamination ? Explain with an example.
(b) Why winter plant fail to flower in spring ?
(c) What is amitosis ? In which type of plant it is found ?
(d) Where do xerophytes normally grow ? Why ?
(e) What is eutrophication ?
(f) What are dehydrogenases and oxidases ?
7. Answer any five questions 4 x 5 = 20
(a) When a - ketoglutaric acid is oxidised to CO2 and H2O via TCA cycle how many mole of ATP/mole of a - KGA is produced ? Name the enzymes envolved.
(b) What is the cause of root nodule formation in Leguminous plant ?
(c) What is photorespiration ? How it is considered helpful in increasing productivity in tropical regions ?
(d) What is Q10 and RQ ? Give their significance.
(e) What is split gene ?
(f) What do you mean by Calciphilous and Calciphobous plants ? Give one example of each.
8. Indicate with suitable example (any five) : 4x5= 20
(a) How the plants survive under total submerged condition ?
(b) How the insects are digested by the insectivorous plants ?
(c) Taking light and relative humidity as vector give the vertical subdivision of a forest community with example.
(d) Why during the spring certain woody monocotyledonous plants bleed sap when the stem is cut or broken ?
(e) How the plants exude alkaloids in liquid form ?
(f) How the plants survive without root hairs and cholorophyll ?
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