Microbes in human welfare - Live Session - NEET 2020Contact Number: 9667591930 / 8527521718Microbes in human welfare - Live Session - NEET 2020Contact Number: 9667591930 / 8527521718Microorganisms are used during which stage of the purification of the sewage water?
(1) Primary treatment
(2) Secondary treatment
(3) Tertiary treatment
(4) Both (1) and (2)
Match the following list of bioactive substances and their roles:
Choose the correct match:
(1) (i)-b, (ii)-c, (iii)-a, (iv)-d
(2) (i)-d, (ii)-b, (iii) -a, (iv)-c
(3) (i)-d, (ii)-a, (iii)-b, (iv)-c
(4) (i)-c, (ii)-d, (iii)-b, (iv)-a
Which one of the following alcoholic drinks is produced without distillation?
(1) Wine
(2) Whisky
(3) Rum
(4) Brandy
The residue left after methane production from cattle dung is:
(1) burnt
(2) burried in land fills
(3) used as manure
(4) used in civil construction
The free-living fungus Trichoderma can be used for:
(1) killing insects
(2) biological control of plant diseases
(3) controlling butterfy caterpillars
(4) producing antibiotics
The primary treatment of waste water involved the removal of:
(1) dissolved impurities
(2) stable substances
(3) toxic substances
(4) harmful bacteria
Identify the incorrect matched pair:
(1) Trichoderma harzianum: Cyclosporin A
(2) Monascus purpureus: Statins
(3) Asperillus niger: Citric acid
(4) Streptococcus pyogenes: Clot buster
Identify the incorrectly matched pair:
(1) Stretococcus - Clot buster
(2) Monascus purpureus - Statins
(3) Trichoderma harziamum - Immunosuppressant
(4) Aspergillus nier - Citric acid
Which of the following is correctly maticed for the product produced by them?
(1) Acetobacter aceti: Antibiotics
(2) Methanobacterium: Lactic acid
(3) Penicullium notatum: Acetic Acid
(4) Saccharomyces cerevisiae: Ethanol
Which of the following is wrongly matched in the given table?
Microbe Product Application
(1) Monascus purpureus Statins Lowering of blood cholesterol
(2) Streptococcus Streptokinase Removal of clot from blood vessel
(3) Clostridium butylicum Lipase Removal of oil stains
(4) Trichoderma polysporum Cyclosporin-A Immunosuppressive drug
Read the following four statements (A – D) about certain mistakes in two of them :
(A) Dough, which is used for making foods such as dosa and idli is fermented by fungi and algae
(B) Toddy, a traditional drink of southern India is made by fermenting sap from palms.
(C) Large hole in 'Swiss cheese' are due to production of large amount of methane by Propionibacterium sharmanii
(D) In our stomach, lactic acid bacteria play very beneficial role in checking disease - causing microbes
Which are the two statements having mistakes ?
(1) Statements (A) & (C) (2) Statements (A) & (B)
(3) Statements (B) & (C) (4) Statements (C) & (D)
Fermented beverage with maximum alcohol content is
(1) Beer (2) Brandy
(3) Whisky (4) Gin
Trichoderma polysporum is a source of
(1) Cyclosporin-A (2) Streptokinase
(3) Statins (4) Clot buster
The greater BOD of waste water relates
(1) Increases oxygen content of water
(2) Decreases oxygen content of water
(3) The decrease of temperature of water
(4) All of these
All are correct with respect to BOD (Biochemical Oxygen Demand), except
(1) It refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria
(2) The BOD test is a measure of the organic matter present in the water
(3) The greater the BOD of waste water, less is its polluting potential
(4) Waste water is treated till BOD is reduced significantly
Biogas contains
(1) 30% – 40% Methane
(2) 50% – 70%
(3) 50% – 70% Methane
(4) 20% Methane
Which of the following are natural insecticides?
(a) Rotenone
(b) Pyrethrum
(c) Nicotine
(d) Azadirachtin
(1) (a), (b) & (c) only (2) (a), (c) & (d) only
(3) (a) & (b) only (4) (a), (b), (c) & (d)
Biofertilisers include
(1) Blue-green algae, Rhizobium, other nitrogen-fixing bacteria and mycorrhiza
(2) Blue-green algae, Trichoderma, Rhizobium and other nitrogen-fixing bacteria
(3) Rhizobium, other nitrogen-fixing bacteria, NPV and mycorrhiza
(4) Blue-green algae, Rhizobium, Bt and mycorrhiza
Consider the following four statements (A - D) related to organic farming and select the correct option stating which ones are true (T) and which ones are false (F). The statements :
(A) Produces food crops rich in lipids, vitamins and iron
(B) Uses biofertilisers which increases soil fertility
(C) There is more use of chemical fertilisers and pesticides
(D) Raising unpolluted crops through the use of bacteria, fungi and cyanobacteria
(A) (B) (C) D)
(1) T T F F
(2) F T F T
(3) T F T F
(4) T F F F
Conversion of milk to curd improves its nutritional value by increasing the amount of
(1) Vitamin D (2) Vitamin A
(3) Vitamin E (4) Vitamin B12
Which of the following in sewage treatment removes suspended solids?
(1) Tertiary treatment (2) Secondary treatment
(3) Primary treatment (4) Sludge treatment
Match Column-I with Column-II and select the correct option using the codes given below :
Column-I Column-II
a. Citric acid (i) Trichoderma
b. Cyclosporin A (ii) Clostridium
c. Statins (iii) Aspergillus
d. Butyric acid (iv) Monascus Codes :
Codes:
a b c d
(1) (iii) (i) (ii) (iv)
(2) (iii) (i) (iv) (ii)
(3) (i) (iv) (ii) (iii)
(4) (iii) (iv) (i) (ii)
What gases are produced in anaerobic sludge digesters?
(1) Methane and C only
(2) Methane, Hydrogen sulphide and C
(3) Methane, Hydrogen sulphide and
(4) Hydrogen sulphide and C
The domestic sewage in large cities
(1) Has a high BOD as it containing both aerobic and anaerobic bacteria
(2) Is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)
(3) When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
(4) Has very high amounts of suspended solids and dissolved salts
Monascus purpureus is a yeast used commercially in the production of
(1) Blood cholesterol lowering statins
(2) Ethanol
(3) Streptokinase for removing clots from the blood vessels
(4) Citric acid
Measuring Biochemical Oxygen Demand (BOD) is a method used for
(1) Measuring the activity of Saccharomyces cervisae in producing curd on a commercial scale
(2) Working out the efficiency of R.B.Cs. about their capacity to carry oxygen
(3) Estimating the amount of organic matter in sewage water
(4) Working out the efficiency of oil driven automobile engines
The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
(1) Chemosynthetic autotrophs
(2) Heterotrophic bacteria
(3) Cyanobacteria
(4) Archaebacteria
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
(1) Glomus
(2) Trichoderma
(3) Azotobacter
(4) Aspergillus
Secondary sewage treatment is mainly a
(1) Biological process
(2) Physical process
(3) Mechanical process
(4) Chemical process
The most common substrate used in distilleries for the production of ethanol is
(1) Molasses
(2) Corn meal
(3) Soya meal
(4) Ground gram
Consider the following statements (A-D) about organic farming
A. Utilizes genetically modified crops like Bt cotton.
B. Uses only naturally produced inputs like compost.
C. Does not use pesticides and urea.
D. Produces vegetables rich in vitamins and minerals.
Which of the above statements are correct ?
(1) (B) and (C) only
(2) (A) and (B) only
(3) (B), (C) and (D)
(4) (C) and (D) only
Select the correct statement from the following
1. Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
2. Biogas is produced by the activity of aerobic bacteria on animal waste
3. Methanobacterium is an aerobic bacterium found in rumen of cattle
4. Biogas, commonly called gobar gas, is pure methane
Which of the following is not used as a biopesticide?
(1) Trichoderma harzianum
(2) Nuclear Polyhedrosis Virus (NPV)
(3) Xanthomonas campestris
(4) Bacillus thuringiensis
Probiotics are
(1) Live microbial food supplement
(2) Safe antibiotics
(3) Cancer inducing microbes
(4) New kind of food allergens
One of the major difficulties in the biological control of insect/pest is that
(1) The method is less effective as compared with the use of insecticides
(2) The practical difficulty of introducing the predator to specific areas
(3) The predator develops a preference to other diets and may itself become a pest
(4) The predator does not always survive when transferred to a new environment
Which one of the following helps in absorption of phosphorus from soil by plants?
(1) Anabaena (2) Glomus
(3) Rhizobium (4) Frankia
A : Curd is more nutritious than milk.
R : LAB present in curd checks growth of disease causing microbes.
A : After 24 hours toddy becomes unpalatable.
R : Toddy left for a few hours undergoes fermentation.
A : Newer antibiotics are required to be produced regularly.
R : Pathogens often develop resistance to existing antibiotics.
A : Cyclosporin A is an immunosuppressive medicine.
R : It stimulates activation of T-cells and prevents rejections.