Unit- II & VI of Second Year

In this part Unit-II and Unit -VI of second year is being clubbed for easy preparation as they related in every aspect. Unit-II is Microbiology with Bacteria and Virus dealt separately. The Unit-VI is the last one dealing Plants, Microbes in Human welfare. In this Unit 13 and 14 chapters are included. 14th chapter is more related to Microbiology. The 13th chapter is more related to genetics and biotechnology. Particularly the 13th chapter is important for match the following type of questions. For long term students the last Unit is new one. The student is advised to go through carefully as we can expect nearly 8 questions from this part. As there is some deviation from the last year syllabus long term student need an extra attention on this chapters.
 
 Model Questions
 1.    True statement among the following
 I.    In viral infections protein coat do not take part
 II.    Without a protein coat viroids can cause disease.
 III.    Only protein can cause 'scrapie' disease in sheep
 IV.    Infectious agent of 'mad cow' disease in protein
     1) I & II    2) II & III
     3) III & IV    4) I, II, III & IV

 2.    True statement regarding bacteria
 I.    Arrangement of cells in cocci is more complex     
 II.    Shape of bacteria depends on cell walls
 III.    Bdellovibrio is a virus that lives as parasite on bacteria.
 IV.    Photoheterotrophic bacteria utilizes gaseous CO2.
     1) I & II    2) II & III
     3) I & III    4) III & IV
          A           B          C  

 3.    NH3  ____ NO2 ____  NO3 ____    N2
 A, B, C in the above reaction
 respectively
 1)    A-Nitrosomonas, B-
     Pseudomonas, C- Nitrobacter    
 2)    A- Nitrococcus, B-
     Nitrobacter, C- Thiobacillus
 3)    A-Nitrosbacter, B- Nitroso- monas, C-Pseudomonas
 4)    A-Pseudomonas , B-
     Thiobacillus, C- Nitrococcus
 4.    'Germ theory of diseases' fails to explain the diseases caused by
     1) Viruses       2) Mycoplasma
     3) Actinimycetes 4) Protozoa

 5.    The eclipse period of the viral infection of bacterium refers to
 1)    Period between attachment and penetration
 2)    A period after maturation  and before lysis of the bacterial cells
 3)    A period of time between infection and appearance of mature viruses within the cell.
 4)    A period of finding the bacteria by the virus before attachment.

 6.    'Hidden hunger' is    
 1)    Large requirements of food and nutrients due to metabolic disorder developed as a result of lack of  vegetables in normal diet.
 2)    Hunger due to excess amounts of vegetables and low animal fats in the normal diet.
 3)    Micronutrient deficiency or vitamin deficiency developed in consequent to lack of balanced diet due to poverty.
 4)    Craving for food from plant sources developed as a result of consuming genetically modified plants.

 7.    'Probiotics'  are
 1)    Science dealing with primitive biological organi -sms and their classification.
 2)    Eating curd as part of regular diet.
 3)    Kinds of foods that encourages the growth of normal intestinal flora.
 4)    Foods containing lot of beneficial bacteria or microbes that form part of normal diet or therapeutic agents.

 8.    Assertion(A): LAB plays very beneficial role in checking disease-causing  microbes in our stomach
     Reason(R): LAB produces antibiotics in our stomach.
 1)    Both A, R are true and R is the correct explanation of A.
 2)    Both A, R are true but R is not the correct explanation of A.
 3)    A is true but R is false
 4)    A is false but R is true

 9.    To demonstrate bacteria the best household sample is
     1) Bread    2) Curd
     3) Cheese    4) All the above

 10.    Microorganism used in 'Swiss cheese' production is
     1) Penicillium
     2) Propionibacterium
     3) Lactobacillus     4) Aspergillus

 11.    Composition of biogas during sewage treatment
 1)    Exclusively methane
 2)    Methane, H2S and CO2
 3)    Methane and CO2    
 4)    Natural gas

 12.    True statement regarding biogas production is
 I.    Anaerobic bacteria is involved in the biogas production
 II.    Cattle dung is the medium for the biogas production
 III.    The spent slurry is not useful as fertilizer
 IV.    Every time inoculums should be added to the medium
     1) I & II    2) II & III
     3) III & IV    4) IV & I

 13.    Organic farming or biological farming envisages
 1)    Biodiversity    
 2)    Pest eradication    
 3)    Genetic engineering methods in farming
 4)    All the above

 14.    The BOD values of four water samples  A B C D respectively are 20 mg/L , 8 mg/ L , 300 mg/ L , 150 mg/L.     The correct statement regarding this is    
 1)    Sample C is less polluted and BOD is very high
 2)    All the samples are equally polluted as BOD is not Zero
 3)    Sample B is highly polluted as BOD is inversely proportional to pollution
 4)    Sample B is less polluted as BOD is very low.

 15.    Wrong statement regarding microbes
 1)    The bacteria live in rumen of cattle is an autotroph
 2)    Oscillatoria is N2 fixing symbiotic bacteria
 3)    Yeast is multiplied enormously to be used as an SCP.
 4)    Epstien-Barr virus causes cancer in humans.

 16.    Assertion(A): Cyanobacteria are considered useful in paddy fields.
     Reason(R): Cyanobacteria are aquatic. Paddy crop needs water stagnation.
 1)    Both A, R are true and R is the correct explanation of A.
 2)    Both A, R are true but R is not the correct explanation of A.
 3)    A is true but R is false
 4)    A is false but R is true

 17.    'Super microbes' are
 1)    Microbes which are highly beneficial to the human beings
 2)    Drug resistant pathogens.
 3)    Microbes with many beneficial characters
 4)    Microbes that are used in genetic engineering.

 18.    Not a reemerging infectious disease
     1) Cholera     2) SARS
     3) Tuberculosis    4) Dengue fever

 19.    Effluent from primary treatment consisting of
 1)    Filtrate and water with microbes
 2)    All solids that settles from primary sludge
 3)    Water sans(without) floating debris and grit
 4)    Primary sludge and water.

 20.    Assertion (A): Secondary treatment is referred as Biological Treatment.
     Reason(R): During secondary treatment methane is released.    
 1)    Both A, R are true and R is the correct explanation of A.
 2)    Both A, R are true but R is not the correct explanation of A.
 3)    A is true but R is false
 4)    A is false but R is true

 21.    Contamination of drinking water can spread the disease
     1) Plague    2) Diphtheria
     3) Polio    4) SARS

 22.     The most desired character in the parents is
 1)    Variability in their alleles
 2)    Few dominant traits in both parents
 3)    One parent is recessive
 4)    Homozygous dominant for as many traits as possible

 23.    Most desired character in the new cultivar
 1)    Homozygosity for dominant character
 2)    Heterozygous for all traits
 3)    Homozygous recessive for all characters
 4)    Homozygous recessive for few traits.

 24.    Assertion(A): Genetic variability is the root any breeding programme.
     Reason(R):Variability provides scope to select required traits.
 1)    Both A and R are correct and R is the correct explanation of A.
 2)    Both A and R are correct but R is not the correct explanation of A.    
 3)    A is correct, R is false
 4)    A is false, R is true

 25.    True statement regarding
 achievement of Plant Breeding in India    
 1)    Wheat resistant to water stress is developed
 2)    Semi-dwarf variety IR-8 developed.
 3)    Paddy variety of 'Jaya' & 'Ratna' were developed.
 4)    A better Sugarcane is introduced into South India.

 26.    Bacterial disease on crucifers    1) Brown rust    2) Red rot
     3) Late blight    4) Black rot

 27.    Genetic constitution of the plant decides
 1) Resistance to the pathogen
 2)    Yield of the crop
 3)    Tolerance to thew drought
 4)    All the above

 28.    'Pusa komal' is resistant to    1) Leaf curl    
     2) Bacterial blight
     3) Aphids    4) Rust
 29.    Resistant to yellow mosaic virus and powdery mildew is induced in            
    1) Chilli    2) Green gram
     3) Flat bean    4) Mustard

 30.    Cauliflower variety that resists Black rot and Curl blight is    1) Pusa Swarnam
     2) Pusa shubra        3) Pusa Gourav    
     4) Pusa Sadabahar.

 31.    Maize variety resistant to stem borer shows
 1)    High aspartic acid, low nitrogen and low sugar
 2)    Low aspartic acid, high nitrogen and low sugar
 3)    High aspartic acid, high nitrogen and low sugar
 4)    Low aspartic acid, low nitrogen and low sugar

 32.    Assertion (A):'Atlas 66' is used as donor for improving cultivation varieties of wheat.
     Reason(R): 'Atlas 66'is a wheat variety with high protein content.
 1)    Both A and R are correct and R is the correct explanation of A.
 2)    Both A and R are correct but R is not the correct explanation of A.    
 3)    A is correct, R is false
 4)    A is false, R is true

 33.    King of green vegetable is enriched with    
 1)    Vitamin C and Fe
 2)    Vitamin C and Fe and Ca
 3)    Mineral Fe and Ca
 4)    Vitamin A and Ca

 34.    Spirulina is
 1)    Unicellular
 2)    Multicellular filament
 3)    Prokaryote    4) A bacterium

 35.    Temparature in autoclave is    1) 120oC    2) 121oC
     3) 100oC    4) 15oC.
 
 KEY
 1)  4    2)  1    3)  2    4)  1
 5)  3    6)  3    7)  4    8)  3
 9)  2    10) 2    11) 2    12) 1
 13) 1    14) 4    15) 2    16) 1
 17) 2    18) 2    19) 3    20) 2
 21) 3    22) 4    23) 1    24) 1
 25) 3    26) 4    27) 4    28) 2
 29) 2    30) 2    31) 1    32) 1
 33) 2    34) 3    35) 2