W.B.C.S Main 2002 Optional Question Paper Botany.

W.B.C.S Main 2002 Optional Question Paper Botany – PAPER 1

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) :    4×5= 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 ?

W.B.C.S Main 2002 Optional Question Paper Botany – PAPER 2

Group – A

Answer any three questions

1.  (a) What is Necrosis ?   Give the scientific name of the organism which is responsible for the disease “Late blight of Potato”.  What are the symptoms observed ?  State the methods of control       1+1+5+5=12

(b)  What is Mycotoxin ?   Mention the sources and harmful effects of two mycotoxins.       2+2+2 = 6

(c)  What do you mean by mycoses ?   Give an example.      1+1=2

2.  (a) What do you understand by Host-defense ?   Discuss, the biochemical lines of defense in plants against the pathogens.  What is disease mangement ?     2+8+4=14

(b) Mention the sources and uses of Amylase citric acid and alcohol.     2+2+2=6

3.  (a) Distinguish between the following pairs (any four) :

i)  Endemic and Epiphytotic disease

ii)  Quarantine and Sanitation

iii)  Satellite and Slow Virus

iv)  Capsid and Capsomere

v)  Non-persistent and Persistent Virus

vi)  Gram + ve and Gram – ve bacteria.      4×4=16

(b) What is Mycorrhiza ?  Name the types.of mycorrhiza. Mention two important functions of mycorrhiza.     1+1+2=4

4.   (a) Give an account of the thallus structure in the algae members you have studied.       14

(b) Comment on the following structures (any two) :

i)  Dwarf male of Oedogonium

ii)  Cystocarp of Polysiphonia

iii)  Pigments and reserve food meterials of Pheophyceae

iv)  Two industrial uses of Lichen.     3×2 = 6

5.  (a)  Give an account of the sporophytes of Bryophytes you have studied, and point out the line of advancement.       12

(b)  What is heterospory ?  Name one heterosporous pteridophyte. Point out the differences between haplo and actino stele, Ectophloic and amphiphloic-Siphonostele of Pteridophytes.      1+1+3+3=8

Group-B

Answer any two questions.

6.  (a)  State briefly why Gnetum is considered as  most advanced among Gymnosperms.      8

(b)  What is gametogenesis ?  Write in short the development of female gametophyte in angiosperm.      1+8 = 9

(c)  Write short notes on (any one):

i) Coralloid root,

ii) Polyembryony.    3×1=3

7.  (a) Give the characteristic features of the following (any two) :

i) Principles of a phyllogenetic system of classification,

ii) Contorted, Quincuncial and Vexillary type of aestivation,

iii) Caducons and accroscent Calyn.     3×2=6

(b)  Point out the distinguishing characters of (any two):

i) Flower of Pea,

ii) Fruit of Ficus,

iii) Seed of Castor,

iv) Inflorescence of Sunflower.     3×2=6

(c)  State the contrivances for cross-pollination.       8

8.  (a) Distinguish between the following families (any two):

i) Apocynaceae and Asclepiadaceae,

ii) Solanaceae and Acanthaceae,

iii) Gramineae and Cyperaceae.     5×2=10

(b)   Name the families to which the following plants belong. Mention their economic importance (any three): Coconut, Jute, Mango, Cotton.     3×3=9

(c)  What do you mean by binomial nomenclature ?     1

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