UPSC Mains 2017 Botany Optional – Test 4 : Mains Marathon

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Dear Friends,

Here is the 4th Mains Marathon Botany Optional Test.

We have decided to move section wise with the basic understanding of each topic of every paper.

In the mid-September we will do the complete paper every week so that you can get the feel to complete the paper before real exam (October 2017).

Hope you will enjoy the initiative.

                                            C.S.E. (MAIN), SUBJECT – BOTANY

                                                   PAPER – I, SECTION – A

Topics: 3

1) Microbiology:

i) Viruses, viroids, bacteria, fungi, mycoplasma and their structure, reproduction, and application inagriculture, industry, medicine etc.

ii) Some important crop diseases caused be these, Molecular basis of infection and diseases forecasting.

2) Cryptogams:

i) Algae, ii) Fungi, iii) Lichens, iv) Bryophytes , v) Pteridophytes and their structure, reproduction and evolutionary importance.

3) Phanerogames:

i) Gymnosperm

Q.1 Briefly describe the following in not more than 150 words each:

(a) Nucleoid or genophore

(b) Structure of bacterial flagellum

(c) Importance of lichen in soil formation

(d) What are the roles of fungi in medicinal research?

(e) Give a brief account about the utilization of Algae in Industry

Q.2 (a) How mushroom cultivation as a growing industry in the field of agriculture can address different social and economical issues in a country?  Discuss.

(b) Give a brief account of the life history of Oedogonium.

(c)  Explain the Post fertilization changes in the life history of Sargassum. Draw a suitable diagram.

(d)  Describe the development changes before pollination in male gametophyte in of Cycas.

Q.3 Draw well labeled diagrams of the following:

(a)Sex organ of the Chara

(b) Vegetative structure of Volvox

(c) L.S. of gemma cup

(d) L.S. cone of Selaginella

Q .4 (a) What is the life history of bacteriophage? What is the biological importance of bacteriphage?

(b) Discus about the different defence mechanism which was adopted by the aquatic plants during the course of evolution.

Q.5 (a) Give the name of the causal organism, symptoms and control measures of the crop disease powdery mildew of peas.

(b) What are the symptoms of Puccinia graminis tritici on the grain host and on the barberry host?

(c) Explain the disease cycle of leaf spot (tikka) disease of groundnut.

(d) What are different methods of vegetative reproduction in algae?

Q.6 Write explanatory note on the following:

(a) Nutritional value of algae

(b) Algae as a sources for production of bio-fuel

(c) Seaweed resource of India

(d) Sexual fruiting bodies in Basidiomycetes

All Mains Marathon Optional Questions are updated in this page.