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Which chemical substance affects the Ozone Layer?
General Science Biology Class 12th NEET UG NEET UG Preparation
Q. 1 of Quiz-1475 (Que-ID : 3519)
Which chemical substance affects the Ozone Layer?
- Chlorofluorocarbon
- Chlorine
- Hexafluorocarbon
- Molecular Carbon
Ans → (a)Chlorofluorocarbon
Explanation → Chlorofluorocarbon affects the Ozone Layer.
This question is taken from this post → Environmental Issues : Biology (Class 12th) Revision Test | MCQs for NEET - attemp/practice
More MCQs in - Environmental Issues : Biology (Class 12th) Revision Test | MCQs for NEET
Q. 1 of Quiz-1475 (Que-ID : 3519)
Which chemical substance affects the Ozone Layer?
- Chlorofluorocarbon
- Chlorine
- Hexafluorocarbon
- Molecular Carbon
Q. 2 of Quiz-1475 (Que-ID : 3520)
In Ozone Degradation which element acts as catalyst?
- Chlorine
- Flurine
- Oxygen
- Potassium
Q. 3 of Quiz-1475 (Que-ID : 3521)
Ozone Layer is found in
- Stratosphere
- Lithosphere
- Troposphere
- Hemisphere
Q. 4 of Quiz-1475 (Que-ID : 3522)
Acid Rain comes under which type of pollution?
- Water pollution
- Air pollution
- Soil pollution
- Sound Pollution
Q. 5 of Quiz-1475 (Que-ID : 3523)
Environment (Protection) Act came into force in?
- 1986
- 1989
- 1992
- 1993
Q. 6 of Quiz-1475 (Que-ID : 3524)
Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with
- DDT
- Ammonia
- CO2
- Water
Q. 7 of Quiz-1475 (Que-ID : 3525)
Chlorofluoro carbon are responsible for
- Acid rain
- Ozone layer depletion
- Global warming
- Thermal inversion
Q. 9 of Quiz-1475 (Que-ID : 3527)
Nutrient enrichment of water bodies causes
- Stratification
- Eutrophication
- Succession
- None of these
Q. 10 of Quiz-1475 (Que-ID : 3528)
Increased skin cancer and high mutation rate are due to
- Acid Rain
- Ozone Depletion
- CO2 Pollution
- CO Pollution
Q. 11 of Quiz-1475 (Que-ID : 3529)
Natural air pollutant are
- Pollen Grains
- Gases of Volcanic Eruption
- Aerosol
- Fluorides
Q. 12 of Quiz-1475 (Que-ID : 3530)
Which one of the following is not a greenhouse gas?
- Methane
- CO2
- Chlorofluoro carbon
- Hydrogen
Q. 13 of Quiz-1475 (Que-ID : 3531)
Minimata disease is caused by
- ByChromium
- By Cadmium
- By Methyl mercury
- By Radioactive elements
Q. 14 of Quiz-1475 (Que-ID : 3532)
Bluebaby syndrome results from
- Excess of TDS
- Excess of DO
- Excess of chloride
- Methaemoglobin
Q. 15 of Quiz-1475 (Que-ID : 3533)
A mutagenic pollutant is:
- Organophosphate
- Resines
- Hydrocarbons
- Nitrogen oxides
Q. 17 of Quiz-1475 (Que-ID : 3535)
Common indicator organism of water pollution is
- Lemna pancicostata
- Eichhomia crassipes
- Escherichia coli
- Entamoeba histolytica
Q. 19 of Quiz-1475 (Que-ID : 3537)
Act formulated in 1996 was
- Insecticide Act
- Air (Prevention and Control of Pollution) Act
- Water (Prevention and control of Pollution) Act
- Environment protection Act
Q. 20 of Quiz-1475 (Que-ID : 3538)
Permissible noise levels in a residential area at night time is
- 35 dB
- 40 dB
- 45 dB
- 50 dB
Q. 21 of Quiz-1475 (Que-ID : 3539)
The natural aging of the lake is called
- Biomagnification
- Eutrophication
- BOD
- None of the above
Q. 22 of Quiz-1475 (Que-ID : 3540)
The agents that bring undesirable changes in the environment arc called
- Pollution
- Fragments
- Pollutants
- None of the above
Q. 23 of Quiz-1475 (Que-ID : 3541)
Particulate matter can be removed by
- Catalytic converter
- Converter
- Radioactive converter
- Electrostatic converter
Q. 24 of Quiz-1475 (Que-ID : 3542)
The petrol used in engines filled with catalytic converter should be
- Simple petrol
- Any type of petrol
- Unleaded petrol
- None of the above
Q. 25 of Quiz-1475 (Que-ID : 3543)
Which metal inactivates a catalytic converter?
- Gold
- Iron
- Silvers
- Lead
More MCQs In - General Science Biology Class 12th NEET UG NEET UG Preparation
Q. 18 of Quiz- (Que-ID : 3186)
Which membrane protects the eyes of frog in water?
- Tympanum
- Skin
- Sebaceous
- Nictitating
Q. 1 of Quiz- (Que-ID : 2944)
Which of the following statements is the most appropriate for sickle cell anaemia ?
- It cannot be treated with iron supplements.
- It is a molecular disease.
- It conferes resistance to acquiring malaria
- All of the above.
Q. 25 of Quiz- (Que-ID : 3293)
Yeast is different from penicillium and Rhizopus in being
- Acellular
- Unicellular
- Having unseptate hyphae
- multicellular
Q. 5 of Quiz- (Que-ID : 3048)
TCA cycle was discovered by
- Otto Meyerhof
- Hans Kreb
- Gustav Embden
- All of these
Q. 2 of Quiz- (Que-ID : 2645)
Which among the following have well developed respiratory system
- Cockroaches
- Earthworms
- Sponges
- Mammals
Q. 17 of Quiz- (Que-ID : 3185)
Frogs are beneficial to us because
- they protect crops
- they links food web
- they are food to man.
- all of these
Q. 17 of Quiz- (Que-ID : 2660)
How many percent of co2 is carried by plasma in dissolved form
- 6
- 7
- 20-25
- None of the above
Q. 21 of Quiz- (Que-ID : 3389)
Which of the following bacteria is present in the rumen of cattle ?
- Azotobacter
- Rhizobium
- Methanobacterium
- Azospirillum
Q. 14 of Quiz- (Que-ID : 2907)
Bartholin’s glands are situated
- on the either side of vagina in humans
- on either side of vas deferens in humans
- on either side of penis in humans
- on either side of Fallopian tube in humans
Q. 1 of Quiz- (Que-ID : 3519)
Which chemical substance affects the Ozone Layer?
- Chlorofluorocarbon
- Chlorine
- Hexafluorocarbon
- Molecular Carbon
Q. 10 of Quiz- (Que-ID : 3028)
To prevent over – ripening, bananas should be
- given a dip in ascorbic acid
- maintained at room temperature
- refrigerated
- stored at the top of refrigerator
Q. 4 of Quiz- (Que-ID : 2617)
The bile duct and pancreatic duct open together into which region of intestine
- Jejunum
- Ileum
- Duodenum
- Cardiac
Q. 10 of Quiz- (Que-ID : 3028)
To prevent over – ripening, bananas should be
- given a dip in ascorbic acid
- maintained at room temperature
- refrigerated
- stored at the top of refrigerator
Q. 10 of Quiz- (Que-ID : 3028)
To prevent over – ripening, bananas should be
- given a dip in ascorbic acid
- maintained at room temperature
- refrigerated
- stored at the top of refrigerator
Q. 7 of Quiz- (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. 20 of Quiz- (Que-ID : 3288)
Pinus differs from mango in having
- Tree habit
- Green leaves
- Ovules not enclosed in ovary
- Wood
Q. 25 of Quiz- (Que-ID : 3543)
Which metal inactivates a catalytic converter?
- Gold
- Iron
- Silvers
- Lead
Q. 10 of Quiz- (Que-ID : 3403)
Restriction’ in Restriction enzyme refers to
- cleaving ofphosphodiester bond in DNA by the enzyme
- cutting of DNA at specific position only
- prevention of the multiplication of bacteriophage in bacteria
- all of the above
Q. 11 of Quiz- (Que-ID : 3079)
Discovery of Emerson effect has already shown the
- two distinct photochemical reactions
- light and dark reactions of photosynthesis
- photophosphorylation
- photorespiration
Q. 7 of Quiz- (Que-ID : 3525)
Chlorofluoro carbon are responsible for
- Acid rain
- Ozone layer depletion
- Global warming
- Thermal inversion
Q. 5 of Quiz- (Que-ID : 2898)
If mammalian ovum fails to get fertilised, which one of the following is unlikely ?
- Corpus luteum will distintegrate.
- Progesterone secretion rapidly declines.
- Estrogen secretion increases.
- Primary follicle starts developing
Q. 11 of Quiz- (Que-ID : 3029)
Growth in dorsiventral leaf is measured in terms of
- length of leaf
- increase in cell number
- surface area increase
- none of these
Q. 19 of Quiz- (Que-ID : 3287)
Which one of the following is a vascular cryptogram?
- Cedrus
- Equisetum
- Ginkgo
- Marchantia
Q. 8 of Quiz- (Que-ID : 3401)
Which of the following steps are catalysed by Taq polymerase in a PCR reaction?
- Denaturation of template DNA
- Annealing of primers to template DNA
- Extension of primer end on the template DNA
- All of the above
Q. 10 of Quiz- (Que-ID : 2703)
How many serially arranged units called vertebrae forms vertebral column
- 23
- 24
- 26
- 28
Q. 4 of Quiz- (Que-ID : 2847)
Nonessential floral organs in a flower are
- sepals and petals
- anther and ovary
- stigma and filament
- petals only.
Q. 14 of Quiz- (Que-ID : 3232)
The coloured part of a Bougainuillea flower is the
- corolla
- calyx
- bracts
- androecium
Q. 12 of Quiz- (Que-ID : 2930)
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called
- supplementary genes
- complementary genes
- duplicate genes
- none of these
Q. 9 of Quiz- (Que-ID : 2952)
If the sequence of initrogen bases of the coding strand of DNA in a transcription unit is: 5’ – ATGAATG – 3’, the sequence of bases in its RNA transcript would be
- 5’ – AUG A AUG – 3’
- 5’ – UACUU AC – 3’
- 5’ – CAUUCAU – 3’
- 5’ – GUAAGUA – 3’.
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. 4 of Quiz- (Que-ID : 3422)
Adjoining of exotic gene in crop is called :
- Genetic Engineering
- Bio architecture
- Tissue culture
- Immunisation
Q. 23 of Quiz- (Que-ID : 3091)
Structurally, chlorophyll a and b are different as
- Chl a has a methyl group and Chl b has an aldehyde group.
- Chl a has an aldehyde group and Chl b has a methyl group.
- Chl a has an ethyl group and Chl b has an aldehyde group
- Chl a has a carboxyl group and Chl b has an aldehyde group.
Q. 17 of Quiz- (Que-ID : 2630)
The small finger like foldings in small intestine is called
- Rugae
- Villi
- Botha a and b
- None of the above
Q. 5 of Quiz- (Que-ID : 3223)
Which one of the following plants dose not have root – pockets
- Pistia
- Lemna
- Ficus
- Eichhornia
Q. 23 of Quiz- (Que-ID : 3141)
What is the effect of turgor pressure in Munch hypothesis?
- Increase of turgor pressure
- Decrease of turgor pressure
- No change in turgor pressure
- independent to water potential gradient
Q. 13 of Quiz- (Que-ID : 3081)
Where are thylakoids and grana located?
- Lysosomes
- Mitochondria
- Chloroplasts
- Golgi apparatus
Q. 16 of Quiz- (Que-ID : 3109)
Toxicity of which element leads to the appearance of brown spots on leaves
- Mg
- Mn
- Fe
- Cu
Q. 7 of Quiz- (Que-ID : 1969)
Respiratory Quotient (RQ) is less than 1 for -
- Potato
- Citrus Fruits
- Castor seeds
- Banana
Q. 7 of Quiz- (Que-ID : 3000)
In mitosis, nuclear envelope and nucleolus disappear during
- Metaphase
- Interphase
- Prophase
- Telophase
Q. 4 of Quiz- (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. 22 of Quiz- (Que-ID : 3240)
Spinous xerophytic herb belonging to solanceae is
- Solanum tuberosum
- S. nigrum
- S. xanthocarpum
- S. melongena
Q. 2 of Quiz- (Que-ID : 3495)
Lion-tailed Macaque is found in:
- Western Ghats
- Caucasus
- Eastern Ghats
- Western Himalaya
Q. 2 of Quiz- (Que-ID : 2870)
Cu ions released from copper releasing intrauterine devices (IUDs)
- prevent ovulation
- make uterus unsuitable for implantation
- decrease phagocytosis of sperms
- suppress sperm motility
Q. 11 of Quiz- (Que-ID : 2879)
RCH stands for
- routine check-up of health
- reproduction cum hygiene
- reversible contraceptive hazards
- reproductive and child health care
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