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Which of the given statement is correct in the context of observing DNA separated by agarose gel electrophoresis?
General Science Biology Class 12th NEET UG NEET UG Preparation
Q. 9 of Quiz-1461 (Que-ID : 3402)
Which of the given statement is correct in the context of observing DNA separated by agarose gel electrophoresis?
- DNA can be seen in visible light
- DNA can be seen without staining in visible light
- Ethidium bromide stained DNA can be seen in visible light
- Ethidium bromide stained DNA can be seen under exposure to UV light
Ans → (d)Ethidium bromide stained DNA can be seen under exposure to UV light
Explanation → Ethidium bromide stained DNA can be seen under exposure to UV light is the correct answer
This question is taken from this post → Biotechnology: Principles and Processes - Biology (Class 12th) Revision Test | MCQs for NEET - attemp/practice
More MCQs in - Biotechnology: Principles and Processes - Biology (Class 12th) Revision Test | MCQs for NEET
Q. 1 of Quiz-1461 (Que-ID : 3394)
Biolistics (gene gun) is suitable for
- introducing rDNA into plant cells
- introducing rDNA into animal cells
- disarming the pathogen vectors
- DNA fingerprinting.
Q. 2 of Quiz-1461 (Que-ID : 3395)
In genetic engineering experiments, restriction enzymes are used for
- viral DNA
- bacterial DNA
- eukaryotic DNA
- any type of DNA.
Q. 3 of Quiz-1461 (Que-ID : 3396)
The DNA fragments produced by the use of restriction endonucleases can be separated by
- polymerase chain reaction
- gel electrophoresis
- density gradient centrifugation
- any of the above
Q. 4 of Quiz-1461 (Que-ID : 3397)
Plasmids in bacterial cells are
- extra-chromosomal DNA, which cannot replicate
- extra-chromosomal DNA, which can . self-replicate
- extra DNA associated with the genome
- extra DNA, associated with the genome, but cannot replicate.
Q. 5 of Quiz-1461 (Que-ID : 3398)
The DNA polymerase enzyme used in PCR is obtained from
- Thermus aquaticus
- Escherichia coli
- Agrobacterium tumefaciens
- Salmonella typhimurium
Q. 6 of Quiz-1461 (Que-ID : 3399)
While isolating DNA from bacteria, which of the following enzymes is not used?
- Lysozyme
- Ribonuclease
- Deoxyribonuclease
- Protease
Q. 7 of Quiz-1461 (Que-ID : 3400)
Significance of ‘heat shock’ method in bacterial transformation is to facilitate
- binding of DNA to the cell wall
- uptake of DNA through membrane transport proteins
- uptake of DNA through transient pores in the bacterial cell wall
- expression of antibiotic resistance gene
Q. 8 of Quiz-1461 (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. 9 of Quiz-1461 (Que-ID : 3402)
Which of the given statement is correct in the context of observing DNA separated by agarose gel electrophoresis?
- DNA can be seen in visible light
- DNA can be seen without staining in visible light
- Ethidium bromide stained DNA can be seen in visible light
- Ethidium bromide stained DNA can be seen under exposure to UV light
Q. 10 of Quiz-1461 (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-1461 (Que-ID : 3404)
The role of DNA ligase in the construction of a recombinant DNA molecule is
- formation of phosphodiester bond between two DNA fragments
- formation of hydrogen bonds between sticky ends of DNA fragments
- ligation of all purine and pyrimidine bases
- none of the above
Q. 12 of Quiz-1461 (Que-ID : 3405)
In an experiment, recombinant DNA bearing ampicillin-resistance gene is transferred into E.coli cells. The host cells are then cultured on a medium containing ampicillin. The result will be
- both transformants and non-transformants cannot survive
- both transformants and non-transformants can survive.
- transformants only and not the non-transformants can survive
- transformants cannot survive, but non-transformants can not.
Q. 13 of Quiz-1461 (Que-ID : 3406)
DNA element with ability to change its position is called
- Cistron
- Transposon
- Intron
- Ricon
Q. 14 of Quiz-1461 (Que-ID : 3407)
Viral genome incroporatcd into host DNA is called:
- Prophase
- Protophage
- Bacteriophage
- None of these
Q. 15 of Quiz-1461 (Que-ID : 3408)
Triticale, first man made cereal crop, has been obtained by crossing wheat with:
- Rye
- Pearl millet
- Sugarcane
- Barley
Q. 16 of Quiz-1461 (Que-ID : 3409)
Golden rice is a promising transgenic crop. When released for cultivation, it will help in :
- High lysin content
- Pest resistance
- High protien content
- High vitamin A content
Q. 17 of Quiz-1461 (Que-ID : 3410)
Restrictipn endonucleases are most widely used in recombinant DNA technology. They are obtained from
- Plasmids
- AH prokaryotic cells
- Bacteriophages
- Bacterial cells
Q. 18 of Quiz-1461 (Que-ID : 3411)
Restriction endonuclease cuts
- One stand of DNA at specific site
- Both strands of DNA
- Both strands of DNA at any site
- Single strand of RNA
Q. 19 of Quiz-1461 (Que-ID : 3412)
Plasmid is a
- Fungus
- Plasmid
- Part of Plasma membrane
- Extra chromosomal DNA in bacterial cell
Q. 20 of Quiz-1461 (Que-ID : 3413)
Two microbes found tb be very useful in Genetic Engineering are
- Excherichia coli and Agrobacterium tumefaciens
- Vibrio cholarae and a tailed bacteriophage
- Diplococcus sp. and Pseudomonas sp.
- Crown gall bacterium and Caenorhabdities elegans
Q. 21 of Quiz-1461 (Que-ID : 3414)
DNA obtained for DNA finger printing:
- W.B.C
- Hair root cells
- Body fluids
- None of these
Q. 22 of Quiz-1461 (Que-ID : 3415)
Who discovered Restricted endonucleas enzymes?
- Smith and Nathane
- Baiger
- Waxman
- Fleming
Q. 23 of Quiz-1461 (Que-ID : 3416)
Two microbes found to be very useful in genetic, engineering are
- Escherichiya Coli and Agrobacterium tumefaciens
- Virbio chloerae and tailed bacteriophage
- Diplococcus sp and pseudomonas sp
- None of these
Q. 24 of Quiz-1461 (Que-ID : 3417)
Transgenic plants are develop by
- Introducing of foreign fenes
- Clone and genetically modified genes
- Genetic engineering
- Purified genes
Q. 25 of Quiz-1461 (Que-ID : 3418)
Transgenic plants are develop by
- Introducing of foreign fenes
- Clone and genetically modified genes
- Genetic engineering
- Purified genes
More MCQs In - General Science Biology Class 12th NEET UG NEET UG Preparation
Q. 5 of Quiz- (Que-ID : 3548)
Which of the following is the essential element for batteries used in electric cars?
- Lithium
- Sodium
- Magnesuium
- Bromine
Q. 19 of Quiz- (Que-ID : 3087)
Light reactions of photosynthesis occurs in
- stroma
- thylakoid
- grana
- cytoplasm of cell
Q. 4 of Quiz- (Que-ID : 3247)
The clam nervous system is composed of
- labial palps
- one pair of ganglia
- two pairs of ganglia
- three pairs of ganglia
Q. 17 of Quiz- (Que-ID : 3035)
Typical plant growth shows _________ curve.
- J-shaped
- S-shaped
- I-shaped
- Parabolic
Q. 22 of Quiz- (Que-ID : 2740)
Genetic recombination in prokaryotes can occur during
- Transformation
- Transduction
- Conjunction
- All of the above
Q. 2 of Quiz- (Que-ID : 3445)
The size of the population tells us a lot about its status in the
- Environment
- Sex-ratio
- Age pyramid
- Habitat
Q. 5 of Quiz- (Que-ID : 3223)
Which one of the following plants dose not have root – pockets
- Pistia
- Lemna
- Ficus
- Eichhornia
Q. 6 of Quiz- (Que-ID : 3524)
Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with
- DDT
- Ammonia
- CO2
- Water
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. 2 of Quiz- (Que-ID : 2920)
The characters which appear in the first filial generation are called
- recessive characters
- dominant characters
- holandric characters
- lethal characters
Q. 2 of Quiz- (Que-ID : 3445)
The size of the population tells us a lot about its status in the
- Environment
- Sex-ratio
- Age pyramid
- Habitat
Q. 16 of Quiz- (Que-ID : 3059)
Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is know as
- TCA pathway
- Glycolysis
- Hms pathway
- Glycolysis
Q. 20 of Quiz- (Que-ID : 3013)
Synaptonemal complex dissolves in _____ stage.
- Zygotene
- Pachytene
- Diakinesis
- Diplotene
Q. 12 of Quiz- (Que-ID : 3480)
That animal who can bear one third loss of water of one third body weight is
- Necturus
- Camel
- Wall Lizzard
- Kyton
Q. 7 of Quiz- (Que-ID : 3075)
Oxidative phosphorylation refers to
- Anaerobic production of ATP
- The citric acid cycle production of ATP
- Production of ATP by chemiosmosis
- Alcoholic fermentation
Q. 2 of Quiz- (Que-ID : 2895)
After ovulation Graafian follicle regreses into
- corpus atresia
- corpus callosum
- corpus luteum
- corpus albicans
Q. 18 of Quiz- (Que-ID : 3236)
Blue dye is obtained from the leaves of
- Indigofera tinctoria
- Opium
- Aloe
- Delbergia sissoo
Q. 16 of Quiz- (Que-ID : 3134)
Cohesion theory of water movement in plants was put forth by
- Henry Dixon
- F. F. Blackman
- Melvin cycle
- Hans. A. Krebs
Q. 4 of Quiz- (Que-ID : 1414)
Which one is a permanent contraceptive method?
- Male sterilization
- Barrier method
- Intra - Uterine devices
- Hormonal methods
Q. 1 of Quiz- (Que-ID : 2969)
Which among the following is not ammonotelic
- Aquatic amphibian
- Aquatic insect
- Bony fishes
- Mammal
Q. 15 of Quiz- (Que-ID : 3058)
A characteristic of drupe is
- fleshy seed coat
- stony pericarp
- stony mesocarp
- stony endocarp
Q. 8 of Quiz- (Que-ID : 2651)
What is the structural and functional unit of lungs
- Bronchioles
- Alveoli
- Bronchi
- Both a and c
Q. 9 of Quiz- (Que-ID : 3177)
Fats are richly found in
- alveolar tissue
- lymph glands
- adipose tissue
- liver cells
Q. 14 of Quiz- (Que-ID : 3232)
The coloured part of a Bougainuillea flower is the
- corolla
- calyx
- bracts
- androecium
Q. 18 of Quiz- (Que-ID : 3436)
Bt toxin is :
- intracellular lipid
- Intracellular crystalline protein
- Extracellular crystalline protein
- Lipid
Q. 25 of Quiz- (Que-ID : 3443)
Bacillus thruingiensis (Bt) strains have been used for designing nobel:
- Biofertilizers
- Biometallurgical techniques
- Biomineralization processes
- Bioinsecticidal plants
Q. 7 of Quiz- (Que-ID : 2675)
Which is also known as reservoir of RBC
- Thymus
- Kidney
- Gall bladder
- Spleen
Q. 25 of Quiz- (Que-ID : 3218)
Vessels and companion cells are respectively present in the xylem and phloem of
- Gymnosperm
- Pteridophytes
- Angiosperm
- Bryophyta
Q. 5 of Quiz- (Que-ID : 3273)
Which of the following is a liverwort?
- Sphagnum
- Funaria
- Marchantia
- Polytrichum
Q. 19 of Quiz- (Que-ID : 3312)
presence of gills in the tadpole of frog indicated that
- fishes were amphibious in the past
- fishes evolved from frog-like ancestors
- frogs will have gills in future
- frogs evolved from gilled ancestors
Q. 3 of Quiz- (Que-ID : 2846)
The stamens represent
- microsporangia
- male gametophyte
- male gametes
- microsporophylls.
Q. 3 of Quiz- (Que-ID : 3296)
The presence of gill slits, in the embryos of vertebrates, supports the theory of
- metamorphosis
- biogenesis
- organic evolution
- recapitulation
Q. 12 of Quiz- (Que-ID : 3055)
The final electron acceptor in electron transport chain is
- Cytochrome C
- FADH
- NADH
- oxygen
Q. 16 of Quiz- (Que-ID : 3234)
The arrangement of sepals or petals in floral bud is called
- Placentation
- Aestivation
- Bracteate
- Phyllotaxy
Q. 23 of Quiz- (Que-ID : 2741)
Diatoms do not decay fast because
- They are chitinous
- They have silicious wall
- Contain saline oil
- Body is impervious to water
Q. 8 of Quiz- (Que-ID : 3051)
Herkogamy is a contrivance for
- allogamy
- autogamy
- chasmogamy
- cleistogamy
Q. 8 of Quiz- (Que-ID : 3451)
The interaction where one species is benefitted and the other is neither benefitted nor harmed is called
- Commensalism
- Amensalism
- Mutualism
- None of the above
Q. 18 of Quiz- (Que-ID : 3036)
Mobilisation of stored food in germinating seeds is triggered by
- auxins
- cytokinins
- gibberellins
- ethylene
Q. 14 of Quiz- (Que-ID : 3182)
Spot the salivary gland in the following :
- sublingual
- adrenal
- Brunners
- lacrimal
Q. 4 of Quiz- (Que-ID : 2947)
Who amongst the following scientist had no contribution in the development of the double helix model for the structure of DN A ?
- Rosalind Franklin
- Maurice Wilkins
- Erwin Chargaff
- Meselson and Stahl
Q. 22 of Quiz- (Que-ID : 3040)
Growth regulator which induces parthenocarpy
- IAA
- ABA
- Cytokinin
- Ethylene
Q. 15 of Quiz- (Que-ID : 2708)
Which joint is present between humerus and pectoral girdle
- Hinge
- Ball and socket
- Pivot joint
- Condyloid
Q. 20 of Quiz- (Que-ID : 3388)
Methanogens, growing anaerobically on cellulosic material produce
- methane
- methane and carbon dioxide
- methane and hydrogen
- methane, carbon dioxide and hydrogen
Q. 7 of Quiz- (Que-ID : 3025)
Which one is incorrect?
- Epiblast is presumptive ectoderm and mesoderm
- Hypoblast is presumptive endoderm
- Hypoblast is presumptive mesoderm
- Upper layer of cells in blastoderm is epiblast
Q. 6 of Quiz- (Que-ID : 3049)
Which one of the following describes the spikelet of a cereal or grass plant
- inferior ovary
- dehiscent fruit
- pair of glumes
- fused calyx
Q. 16 of Quiz- (Que-ID : 2909)
The third stage of parturition is called “after-birth”. In this stage
- excessive bleeding occurs
- fetus is bom and cervix and vagina contraction to normal condition happens
- fetus is bom and contraction of uterine wall prevents excessive bleeding
- placenta is expelled out
Q. 13 of Quiz- (Que-ID : 2706)
Which among the following are involuntary muscles
- Cardiac
- Skeletal
- Smooth
- Both a and c
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