Biology - Biology and Human Welfare
Exam Duration: 45 Mins Total Questions : 30
Immunodeficiency makes a person highly susceptible to infection.It is caused by
- (a)
lack of B-cells
- (b)
lack of T-cells
- (c)
Both (a) and (b)
- (d)
None of these
Haploid production through pollen culture was first made by Guha and Maheswari by using
- (a)
Datura innoxia
- (b)
Solanum melongena
- (c)
Solanum tuberosum
- (d)
Mangifera indica
Bacterial leaf blight of rice is caused by a species of
- (a)
Erwinia
- (b)
Xanthomonas
- (c)
Pseudomonas
- (d)
Altermaria
Which part would be most suitable for raising virus free plants for micropropagation?
- (a)
Meristem
- (b)
Node
- (c)
Bark
- (d)
Vascular tissue
In the sewage treatment bacterial floes are allowed to sediment in a settling tank. This sediment is called as
- (a)
activated sludge
- (b)
primary sludge
- (c)
anaerobic sludge
- (d)
secondary sludge
Organic farming includes
(a) use ofbiofertilisers and biopesticides
(b) crop rotation
(c) Locally developed pest resistant varieties
- (a)
(a) and (b)
- (b)
(a) and (c)
- (c)
(b) and (c)
- (d)
(a), (b) and (c)
Modern detergents contain enzyme preparations of
- (a)
thermophiles
- (b)
acidophiles
- (c)
alkaliphiles
- (d)
thermoacidophiles
Farmers have reported over 50% higher yields of rice by using which of the following biofertilizer?
- (a)
Cyanobacteria
- (b)
Legume-Rhizobium symbiosis
- (c)
Mycorrhiza
- (d)
Azolla pinnata
Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
- (a)
Frequent irrigation of the crop
- (b)
Treatment of the plants with cytokinins along with a small dose of nitrogenous fertiliser
- (c)
Removal of all yellow leaves and spraying the remaining green leaves with 2.4,5-trichlorophenoxy acetic acid
- (d)
Application of iron and magnesium to promote synthesis of chlorophyll
In crop improvement programme, haploids are important because they
- (a)
require one half of nutrients
- (b)
are helpful in study of meiosis
- (c)
grow better under adverse conditions
- (d)
form perfect homozygous
ELISA is used to detect viruses where the key reagent is
- (a)
DNA probe
- (b)
RNase
- (c)
alkaline phosphatase
- (d)
catalase
Which of the following two matches are incorrect?
Exotic breeds of cattle | Country of origin |
(i) jersey | Holland |
(ii) Holstein-Friesian | Germany |
(iii) Ayrshire | Scotland |
(iv) Brown Swiss | Switzerland |
- (a)
(i) and (iii)
- (b)
(i) and (ii)
- (c)
(ii) and (iii)
- (d)
(ii) and (iv)
Artificial insemination involves
- (a)
super ovulation
- (b)
semen collection
- (c)
egg collection
- (d)
embryo collection
Major percentage of India's Gross Domestic Product is constituted by
- (a)
industry
- (b)
agriculture
- (c)
export
- (d)
small-scale cottage industry.
Which one of the following crop varieties correctly matches with its resistance to a disease?
- (a)
Variety Resistance to diseases Pusa Komal Bacterial blight - (b)
Variety Resistance to diseases Pusa Sadabahar White rust - (c)
Variety Resistance to diseases Pusa Swarnim Tobacco Mosaic Virus - (d)
Variety Resistance to diseases Pusa Shubhra Chilli Mosaic Virus
Match different organisms in column I with their uses in column II and select the correct answer from the given codes
Column I | Column II |
---|---|
A. Lactobacillus acidophilus | (i) Formation of dough |
B. Saccharomyces cerevisiae | (ii) Single cell proteins |
C. Propionibacterium sharmanii | (iii) Conversion of milk into curd |
D. Spirulina | (iv) Formation of Swiss cheese |
- (a)
A-(iii), B-(i), C-(ii), D-(iv)
- (b)
A-(iii), B-(i), C-(iv), D-(ii)
- (c)
A-(i), B-(iii), C-Iiv), D-(ii)
- (d)
A-(i), B-(iii), C-(ii), D-(iv)
Inbreeding for five generations led to production of homozygous transgenic mice. However, these homozygous males or females were infertile. Which of the following approaches is most preferable and economical to obtain heterozygous transgenic animals continuously?
- (a)
More transgenic founder (1st animal) should be generated.
- (b)
Crossing (breeding) of transgenic mice with wild-type mice in earlier generations should be done for continued production of transgenic heterozygous offsprings.
- (c)
Inbreeding should be avoided after 5th generation.
- (d)
Homozygous transgenic mice should be mated with heterozygous transgenic mice for continued production of transgenic heterozygous offsprings.
Biogas is produced by
- (a)
aerobic breakdown of biomass
- (b)
anaerobic breakdown of biomass
- (c)
with the help of methanogenic bacteria
- (d)
both (b) and (c).
Study the following statements and select the correct ones.
(i) Methanogens are archaebacteria which produce methane in marshy areas
(ii) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen
(iii) Many members of the genus Glomus form my corrhiza
- (a)
(i) and (ii)
- (b)
(i) and (iii)
- (c)
(ii) and (iii)
- (d)
(i), (ii) and (iii)
Nitrogen fixation in root nodules of Alnus is brought about by
- (a)
Frankia
- (b)
Azorhizobium
- (c)
Bradyrhizobium
- (d)
Clostridium.
Formation of vinegar from alcohol is caused by
- (a)
Bacillus subtitles
- (b)
Clostridium
- (c)
Acetobacter aceti
- (d)
Azotobacter
Which bacteria is utilized in Gober gas plant
- (a)
Methanogens
- (b)
Nitrifying bactria
- (c)
Ammoniifying bacteria
- (d)
Denitrifying bacteria
Biogas produced by anaerobic fermentation of waste biomass consists of:
- (a)
methane
- (b)
traces of H2, H2S and N2
- (c)
CO2
- (d)
all of these
Wine yeast is
- (a)
Saccharomyces ellipsoidens
- (b)
S.sake
- (c)
S.pireformis
- (d)
S.Cerevisiae
Formented beverage with maximum alcohol content is
- (a)
Beer
- (b)
Brandy
- (c)
Whisky
- (d)
Gin
Bull semen of artificial insemination is stored in
- (a)
Ice
- (b)
Liquid carbon dioxide
- (c)
Liquid oxygen
- (d)
Liquid nitrogen
Frieswal is Crossbreed of
- (a)
Brown swiss and sahiwal
- (b)
Tharparkar and Holstein Friesian
- (c)
Holstein Friesian x sahiwal
- (d)
Jersey x sahiwal
Artificial insemination is advantageous because
- (a)
It is economical and success rate of fertilization is high
- (b)
Several cowp can be fertilised by the semen collected from ore bull
- (c)
The seman can be stored forzen for a long period and can be easily transported be remote parts of the country
- (d)
All of these
Match the following list of microbes and their importance:
(a) | Saccharomyces cersvisiae | (ii) | Production of immunosppressive agents |
(b) | Monascus purpureus | (ii) | Ripenning of Swiss cheese |
(c) | Trichoderma polysporum | (iii) | Commerical production of ethanol |
(d) | Propionibacterium sharmanii | (iv) | Production of blood cholesterol lowering agent |
- (a)
(a) (b) (c) (d) (iiii) (i) (iv) (ii) - (b)
(a) (b) (c) (d) (iiii) (iv) (i) (ii) - (c)
(a) (b) (c) (d) (iv) (iii) (ii) (i) - (d)
(a) (b) (c) (d) (iv) (ii) (i) (iii)
Stains commercially used as blood cholesterol lowering agents are produced by
- (a)
Agrobacterium tunefaciens
- (b)
Monasucs polyporum
- (c)
Monascus purpureus
- (d)
Trichoderma viridae