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Dragonflies are used to get rid of
General Science Biology Zoology Class 12th NEET UG NEET UG Preparation
Q. 24 of Quiz-1459 (Que-ID : 3392)
Dragonflies are used to get rid of
- mosquitoes
- aphids
- butterfly caterpillars
- both (a) and (b)
Ans → (a)mosquitoes
Explanation → mosquitoes
This question is taken from this post → Microbes in Human Welfare : Class - 12th (Biology) Practice Test | MCQs for NEET - attemp/practice
More MCQs in - Microbes in Human Welfare : Class - 12th (Biology) Practice Test | MCQs for NEET
Q. 1 of Quiz-1459 (Que-ID : 3369)
Integrated Pest Management (IPM) discourages the excessive used of
- biological methods
- chemical pesticides
- mechanical methods
- all of these
Q. 2 of Quiz-1459 (Que-ID : 3370)
Which of the following is not used as a biopesticide ?
- Trichoderma harzianum
- Nucleopolyhedrovirus
- Xanthomonas campestris
- Bacillus thuringiensis
Q. 3 of Quiz-1459 (Que-ID : 3371)
Organic farming does not include
- green manures
- chemical fertilisers
- farmyard manures
- compost
Q. 4 of Quiz-1459 (Que-ID : 3372)
Organic farming includes
- use of fertilisers and pesticides of biological origin
- IPM (Integrated Pest Management)
- locally developed pest resistant varieties
- all of these
Q. 5 of Quiz-1459 (Que-ID : 3373)
Living organisms used to enrich the nutrient quality of the soil are called as
- biocontrol agents
- biofertilisers
- synthetic fertilisers
- natural fertilisers
Q. 6 of Quiz-1459 (Que-ID : 3374)
Biofertilisers are
- some bacteria and cyanobacteria
- fertilisers formed by ploughing in barseem
- fertilisers obtained by decay of dead organisms
- fertilisers prepared by mixing cattle dung with crop residues
Q. 7 of Quiz-1459 (Que-ID : 3375)
Biofertilisers are the living organisms which
- bring about soil nutrient enrichment
- maximise the ecological benefits
- minimise the environmental hazards
- all of these
Q. 8 of Quiz-1459 (Que-ID : 3376)
Which one of the following can be used as biofertiliser in cotton field ?
- Azolla-Anabaena
- Streptococcus
- Azospirillum
- Azotobacter chroococcum
Q. 9 of Quiz-1459 (Que-ID : 3377)
The symbiotic association between fungi and roots of higher plants is referred to as
- lichen
- mycorrhiza
- biofertiliser
- biocontrol agent
Q. 10 of Quiz-1459 (Que-ID : 3378)
Cyanobacteria are
- heterotrophs
- chemotrophs
- autotrophs
- organotrophs
Q. 11 of Quiz-1459 (Que-ID : 3379)
Enzyme which has the fibrinolytic effect is
- protease
- amylase
- lipase
- streptokinase
Q. 12 of Quiz-1459 (Que-ID : 3380)
Statins used for lowering blood cholesterol level are extracted from
- algae
- bacteria
- viruses
- yeast
Q. 13 of Quiz-1459 (Que-ID : 3381)
Monascus purpureus is a yeast commercially used in the production of
- citric acid
- ethanol
- blood cholesterol lowering statins
- streptokinase for removing clots from blood vessels
Q. 14 of Quiz-1459 (Que-ID : 3382)
During the primary treatment of sewage, solid particles that settle down are called
- floes
- primary sludge
- activated sludge
- anaerobic sludge
Q. 15 of Quiz-1459 (Que-ID : 3383)
The purpose of biological treatment of waste water is to
- reduce BOD
- increase BOD
- reduce sedimentation
- increase sedimentation
Q. 16 of Quiz-1459 (Que-ID : 3384)
The masses of bacteria held together by slime and fungal filaments to form mesh-like structures are called as
- primary sludge
- floes
- activated sludge
- anaerobic sludge
Q. 17 of Quiz-1459 (Que-ID : 3385)
BOD is………..in polluted water and in potable water.
- more, less
- less, more
- less in both
- medium in both
Q. 18 of Quiz-1459 (Que-ID : 3386)
n the sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as
- inactivated sludge
- activated sludge
- primary sludge
- secondary sluge
Q. 19 of Quiz-1459 (Que-ID : 3387)
Which of the following steps is taken by the Ministry of Environment and Forests to protect rivers from water pollition ?
- Ganga Action Plan
- Narmada Action Plan
- Yamuna Action Plan
- Both (a) and (c)
Q. 20 of Quiz-1459 (Que-ID : 3388)
Methanogens, growing anaerobically on cellulosic material produce
- methane
- methane and carbon dioxide
- methane and hydrogen
- methane, carbon dioxide and hydrogen
Q. 21 of Quiz-1459 (Que-ID : 3389)
Which of the following bacteria is present in the rumen of cattle ?
- Azotobacter
- Rhizobium
- Methanobacterium
- Azospirillum
Q. 22 of Quiz-1459 (Que-ID : 3390)
Process of biogas production is
- aerobic process
- anaerobic process
- active process
- passive process
Q. 23 of Quiz-1459 (Que-ID : 3391)
Biogas is produced by
- aerobic breakdown of biomass
- anaerobic breakdown of biomass
- with the help of methanogenic bacteria
- both (b) and (c)
Q. 24 of Quiz-1459 (Que-ID : 3392)
Dragonflies are used to get rid of
- mosquitoes
- aphids
- butterfly caterpillars
- both (a) and (b)
Q. 25 of Quiz-1459 (Que-ID : 3393)
A microbial biocontrol agent that can be used to control butterfly caterpillars is
- Trichoderma polysporum
- Bacillus thuringiensis
- Streptococcus
- mycorrhiza
More MCQs In - General Science Biology Zoology Class 12th NEET UG NEET UG Preparation
Q. 19 of Quiz- (Que-ID : 3287)
Which one of the following is a vascular cryptogram?
- Cedrus
- Equisetum
- Ginkgo
- Marchantia
Q. 13 of Quiz- (Que-ID : 2881)
Which of the following cannot be detected in a developing foetus by amniocentesis ?
- Jaundice
- Down’s syndrome
- Cystic fibrosis
- Colourblindness
Q. 14 of Quiz- (Que-ID : 3032)
The ability to regain or recover the lost or injured part of body is
- Aging
- Regeneration
- Abnormal development
- Primary inductio
Q. 19 of Quiz- (Que-ID : 3462)
Science linking heredity with environment is:
- Ecology
- Ecophysiology
- Genecology
- Genetics
Q. 14 of Quiz- (Que-ID : 2832)
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because
- nodes are shorter than intemodes
- nodes have meristematic cells
- nodes are located near the soil
- nodes have non-photosynthetic cells.
Q. 18 of Quiz- (Que-ID : 2811)
The thin and convoluted outer layer of gray matter that covers the cerebral hemispheres is
- Medulla oblongata
- Thalamus
- Cerebral cortex
- Meninges
Q. 17 of Quiz- (Que-ID : 3335)
Injection of antitoxin in tetanus confers which type of immunisation ?
- Active immunisation
- Passive immunisation
- Auto-immunisation
- Humoral immunisation
Q. 3 of Quiz- (Que-ID : 3046)
The complete oxidation of pyruvate take place in
- cell cytoplasm
- inner mitochondrial membrane
- mitochondrial matrix
- nucleus
Q. 14 of Quiz- (Que-ID : 3432)
From which one of the following plants, the insecticide pyrethrum is prepared.
- Cymohopogen
- Tephrosia
- Crysanthemum
- Vitivera
Q. 3 of Quiz- (Que-ID : 2846)
The stamens represent
- microsporangia
- male gametophyte
- male gametes
- microsporophylls.
Q. 17 of Quiz- (Que-ID : 3360)
Lean meat’ is cosidered to be of high quality because it has
- lesser but easily digestible protein
- lesser lipid content
- more fat that makes the meqt softer
- longer table life due to lesser chances of infection
Q. 8 of Quiz- (Que-ID : 2876)
From the sexually transmitted diseases mentioned below, identify the one which does not specifically affect the sex organs
- Syphilis
- AIDS
- Gonorrhea
- Genital warts
Q. 2 of Quiz- (Que-ID : 3045)
Angiosperm pollen is generally released at the
- 1 – celled stage
- 2 – celled stage
- 3 – celled stage
- male gamete formation stage
Q. 25 of Quiz- (Que-ID : 2638)
In which condition the faeces are retained in the rectum as the bowel movement occur irregularly
- Indigestion
- Constipation
- Diarrhoea
- None of the above
Q. 2 of Quiz- (Que-ID : 2820)
Which of the following options shows bisexual animals only?
- Amoeba, sponge, leech
- Sponge, cockroach, Amoeba
- Earthworm, sponge, leech
- Tapeworm, earthworm, honeybee
Q. 15 of Quiz- (Que-ID : 2933)
Mendal formulated the law of purity of gametes on the basis of
- monohybrid cross
- dihybrid cross
- test cross
- back cross
Q. 15 of Quiz- (Que-ID : 2984)
Which loop of hence is permeable to water
- Descending loop
- Ascending loop
- Both the loops
- None of the above
Q. 22 of Quiz- (Que-ID : 3140)
Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
- Porins
- Pressure gradient
- Enzymes
- Flaccid
Q. 2 of Quiz- (Que-ID : 3295)
The phenomenon ‘ontogeny repeats phylogeny’ is explained by
- recapitualtion theory
- Inheritcance theory
- mutation theory
- natural selection theory.
Q. 22 of Quiz- (Que-ID : 3465)
Animals undergo inactive stage during winters. It is called
- Acclimatisation
- Hibernation
- Aestivation
- Adapatation
Q. 4 of Quiz- (Que-ID : 3022)
Typical plant growth shows _________ curve.
- J-shaped
- S-shaped
- I-shaped
- Parabolic
Q. 12 of Quiz- (Que-ID : 2905)
The function of the secretion of prostate gland is to
- inhibit sperm activity
- attract sperms
- stimulate sperm activity
- none of these.
Q. 9 of Quiz- (Que-ID : 2752)
Which of the following is male sex organs
- Insulins
- Aldosterone
- Androgens
- Pheromones
Q. 14 of Quiz- (Que-ID : 3107)
Insectivorous plants grow where
- There is carbohydrate deficient soil
- There is nitrogen deficient soil
- Vitamin c is required
- Hormones are required
Q. 7 of Quiz- (Que-ID : 2650)
The part starting from external nostril upto terminal bronchioles is known as
- Conducting part
- Exchange part
- Respiratory part
- None of the above
Q. 3 of Quiz- (Que-ID : 3146)
Insulin is made up of _______ and _______.
- glucose and fructose
- glucose and fructose
- fructose and mannose
- mannose and glucose
Q. 2 of Quiz- (Que-ID : 2970)
Which among the following is not ureotelic
- Mammal
- Aquatic insect
- Terrestrial amphibian
- Marine fishes
Q. 2 of Quiz- (Que-ID : 3420)
By means of following Trans gene expression obtained:
- Inhibition of a Innate gene
- An occured Biosynthetic passway develop
- A protein occured with genotype expressed his desired
- None of the above
Q. 24 of Quiz- (Que-ID : 3442)
The species used as natural genetic engineer is :
- Agrobacterim tumefaciens
- Bacillus thruingiensis
- Aspergillus
- Drosophila
Q. 13 of Quiz- (Que-ID : 2626)
Fructose are transported by which mechanism
- Passive transport
- Active transport
- Diffusion
- Facilitated diffusion
Q. 7 of Quiz- (Que-ID : 2675)
Which is also known as reservoir of RBC
- Thymus
- Kidney
- Gall bladder
- Spleen
Q. 18 of Quiz- (Que-ID : 2736)
Which of the feature mycoplasma does not have
- Pleomorphic
- Lack cell wall
- All the above
- Can?t live w/o O2
Q. 16 of Quiz- (Que-ID : 3284)
Antheridia and Archegonia are sex organs of
- Moss
- Mucor
- Spirogyra
- Puccinia
Q. 24 of Quiz- (Que-ID : 3442)
The species used as natural genetic engineer is :
- Agrobacterim tumefaciens
- Bacillus thruingiensis
- Aspergillus
- Drosophila
Q. 12 of Quiz- (Que-ID : 3080)
Translocation of sugar in flowering plants occurs in the form of
- glucose
- sucrose
- starch
- maltose
Q. 12 of Quiz- (Que-ID : 2880)
Amminocentesis is a technique used to
- determine errors in amino acid metabolism in embryo
- pin point specific cardiac ailments in embryo
- determine any hereditary genetic abnormality in embryo
- all of these
Q. 3 of Quiz- (Que-ID : 74)
Which of following is the most viscous medium?
- Coaltar
- Water
- Glycerine
- Alcohol
Q. 13 of Quiz- (Que-ID : 3306)
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift mutation, genetic recombination and
- evolution
- limiting facrtors
- saltation
- natural selection
Q. 3 of Quiz- (Que-ID : 3321)
Which of the following pairs contains an infectious and a non-infectious disease respectively ?
- Typhoid and AIDS
- AIDS and cancer
- Pneumonia and malaria
- Cancer and malaria
Q. 6 of Quiz- (Que-ID : 2699)
What are 8,9 and 10th ribs known as
- True ribs
- False ribs
- Floating ribs
- None of the above
Q. 8 of Quiz- (Que-ID : 2751)
Glucagon hormone is secreted by
- Thyroid gland
- Pituitary
- Adrenal
- Pancreas
Q. 10 of Quiz- (Que-ID : 2953)
The RNA polymerase holocnzyme transcribes
- the promoter, structural gene and the terminator region
- the promoter and the terminator region
- the structural gene and the terminator region
- the structural gene only.
Q. 5 of Quiz- (Que-ID : 3048)
TCA cycle was discovered by
- Otto Meyerhof
- Hans Kreb
- Gustav Embden
- All of these
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