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3401.

Question : VAM is characterized by:

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INTRACELLULAR vesicles
intracellular arbuscules
BOTH (A) AND (B)
ASSOCIATIVE symbiosis

Answer :C
3402.

Question : Valve of Thebesius is present at the opening of

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postcaval into RIGHT atrium
coronary sinus into right atrium
precaval into right atrium
pulmonary VEINS into LEFT atrium

Answer :B
3403.

Question : Value of osmotic potental (pi) and pressure potential (p) of cells a, b, c, d are given {:("cell" ,pi,"p" ),(a,-1.0,0.5),(b,-0.6,0.3),(c,-1.2,0.6),(d,-0.8,0.4):} Identify the correct sequence for movement of water

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`B to C to d to a `
`c to b to a to d `
`d to c to a to b `
`b to d to a to c `

ANSWER :D
3404.

Question :value of pO_2 in deoxygenated blood is equal to value of pCo_2 in

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SYSTEMIC VEINS
systemic ARTERIES
PULMONARY arteries
atmosphere

Answer :B
3405.

Question : Vallisneria Spiralis is ………….. .

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POLYGAMOUS
Monoecious
Dioecious
Prisexual

Answer :C::D
3406.

Question : Vagus nerve is mixed nerve. Justify.

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SOLUTION :Vagus nerve has sensory as WELL as motor nerve FIBRES and it carries impulse both the WAYS, therefore it is CALLED mixed nerve.
3407.

Question : Vaginal opening is encircled by

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OUTER LABIA minora and INNER labia majora
outer labia majora and inner labia minora
outer monspubis and inner labia majora
outer labia majora and inner MONS pubis'

Answer :B
3408.

Question : Vagina, pharynx, urethra contain which type of tissue?

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SIMPLE epithelium
Glandular epithelium
Stratified SQUAMOUS epithelium
Stratified squamous cornified

Answer :C
3409.

Question : Vacuole in a plant cell can occupy upto

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90% of the CELL volume
20% of the cell volume
10% of the cell volume
35% of the cell volume

Answer :A
3410.

Question : Vaccine manufacturing process

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SOLUTION :
3411.

Question : What are vaccines ?

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CURATIVE medicines
Monoclonal antibodies
Treated BACTERIA or VIRUSES or their PROTEINS
MHC-proteins

Answer :C
3412.

Question : Vaccine are prepared from:

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INACTIVATED pathogens
Lymph
Serum
Plasma

Answer :C
3413.

Question : Vaccine against smallpox was developed by :

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LOUIS Pasteur
Edward Jenner
Robert Koch
Alexander Flemig

Answer :B
3414.

Question : Vaccination protects a person from disease because it

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Helps in BETTER digestion
Increases RBC count
Stimulates PRODUCTION of ANTIBODIES
IMPROVES healing system

Answer :C
3415.

Question : Vaccination provides :

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ACTIVE IMMUNITY
PASSIVE immunity
Natural immunity
BOTH (A) AND (B)

ANSWER :A
3416.

Question : Vaccination protects a person from disease because it :

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Helps in BETTER digestion
Increase RBC COUNT
Produces antibodies
Correct body heating system

Answer :C
3417.

Question : vaccination against smallpox was developed by:

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Robert KOCH
LOUIS Pasteur
Edward Jenner
Alexander FLEMING

ANSWER :C
3418.

Question : Vaccination is important for preventing pneumonia.

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Solution :Vaccinations for pneumonia are available against HAEMOPHILUS influenza and Streptococcus PNEUMONIAE. If given earlier in life, they reduce the chances of CATCHING pneumococcal infections. The deaths can be PREVENTED which are common due to lung infections. Since it is a common and chronic disease for all AGE groups, for the prevention one must take vaccination.
3419.

Question : Vaccines that use components of a pathogenic organism rather than the whole organism are called …………….

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attrnuated RECOMBINANT VACCINES
Subunit recombinant vaccines
DNA vaccines
conventional vaccines

Answer :B
3420.

Question : V shaped chromosomes are called______

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Metacentric
acrocentric
submetacentricq
telocentric

Answer :A::C
3421.

Question : UTRs are the untranslated regions present on

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rRNA
tRNA
mRNA
hnRNA

Answer :C
3422.

Question : UTRs in mRNA are

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Required for efficient translation process
Present AL 5'end belore start codon
Present at 3'end before stop codon
Both (1) and (2)

ANSWER :D
3423.

Question : Utricularia is also known as__________

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ROOTED FLOATING HYDROPHYTE
SUBMERGED floating hydrophyte
Rooted submerged hydrophyte
Amphibious hydrophyte

Solution :Submerged floating hydrophyte
3424.

Question : Usually hypodermis is sclerenchymatous in:

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DICOT stem
Monocot stem
Dicot root
Monocot root

Answer :B
3425.

Question : Initiation codon is

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AUU
AUG
AGU
GUA

Answer :B
3426.

Question :Usnic acid is an antibiotic obtained from

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Fungi
Bacteria
LICHENS
ALGAE

ANSWER :C
3427.

Question : Using which contraceptive also provide protection from contracting STDs and AIDS?

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DIAPHRAGMS
SPERMICIDAL FOAMS
CONDOMS
Lactional amenorrhea

Answer :C
3428.

Question : Using various resources such as your school Library or the internet and discussions with your teacher, trace the evolutionary stages of anyone animal, say horse.

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Solution :The evolution of horse started with Eohippus during Eocene period.
It involved the following evolutionary stages : (i) Gradual increase in body SIZE. (H) Elongation ofhead and neck region (Hi) Increase in the length oflimbs and feet. (iv) Gradual reduction oflateral digits. (v) Enlargement of third functional toe (VI) Strengthening of the back (vii) Development of brain and sensory ORGANS. (viii) Increase in the complexity of teeth for feeding on grass.
The evolution of horse is represented as

(i) Eohippus : It had a short head And neck. It had four functional toes and a splint of 1 and 5 on each hind limb and a splint of 1 and 3 in each forelimb.
The molars were short crowned that were adapted for grinding the PLANT diet.
(i) Mesohippus : It was slightly taller than Eohippus.
It had three toes in each foot.
(iii) Merychippus : It had the size of approximately100 cm.
Although it still had three toes in each foot but it could run on one toe.
The side toe did not touch the ground.
The molars were adapted for chewing the grass.
(iv) Pliohippus : It resembled the modem horse and was around 108 cm TALL.
It had a single functional toe with splint of 2nd and 4th in each limb.
(v) Equus : Pliohippus gave rise to Equus or the modem horse with one toe in each foot.
They have incisors for cutting grass and molars for grinding food.
3429.

Question : Using various resources such as your school liberary or the internet and discussions with your teacher, trace the evolutionary stages of any one animal, say horse.

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SOLUTION :BROWSE INTERNET
3430.

Question : Using it ejaculated semen doesn.t enter into vagina. Diphragm Condon IUDs A and B both

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DIPHRAGM
CONDOM
IUDs
A and B both

ANSWER :D
3431.

Question : Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin-resistant mutants and prove that such mutations do not originates as adaptation. These imprints need to be used

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On PLATES with and WITHOUT STREPTOMYCIN
Only on plates with streptomycin
On plates with MINIMAL medium
Only on plates without streptomycin

Answer :B
3432.

Question : Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that -such mutations do not originate as adaptation. These imprints need to be used

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on PLATES with and WITHOUT streptomyci
on plates with minimum medium
only on plates with STREPTOMYCIN
only on plates without streptomycin

SOLUTION :only on plates with streptomycin
3433.

Question : Using genetically modified crops, farmers can minimize the use of insecticides and pesticides during cultivation. Which gene is used for its production.

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SOLUTION :CRY GENE/Bt gene
3434.

Question : Using genetically modified crops, farmers can minimize the use of insecticides and pesticides during cultivation. Write about its mode of action.

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SOLUTION :Bt toxin gene/cry gene has been cloned from Bacillus thuringiensis and INTRODUCED it into crop plants such as cotton plants to PROVIDE resistance to INSECTS without the need of insecticides.
3435.

Question : Using genetically modified crops, farmers can minimize the use of insecticides and pesticides during cultivation. Name the source of pest resistant gene.

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SOLUTION :BACILLUS thuringiensis
3436.

Question : Using a Punnett square, work out the distribution of phenotypic features in the first [F_1] filial generation after across between a homozygous female and a heterozygous male for a single locus.

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SOLUTION :HeterozygousMale `XX` Homozygousfemale
= PARENTS
3437.

Question : Using genetically modified crops, farmers can minimize the use of insecticides and pesticides during cultivation. Give name of one such gentically modified pest resistant crop.

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SOLUTION :BT COTTON
3438.

Question : Useful adaptation for hydrophytes is

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Large leaves 
DECREASE in MECHANICAL tissues 
Large mechanical tissue
Increase in AERENCHYMA 

Answer :D
3439.

Question : Use th proper terms of the stament given below.Few organisms can tolerate and thrive in wide range of temperature.

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SOLUTION :EURYTHERMAL
3440.

Question : Used water and waste substances that are produced by human bodies is known as:(A) Sea waste(B) Sewage(C) Pollution(D) BOD

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SEA waste
Sewage
Pollution
BOD 

ANSWER :B
3441.

Question : Use th proper terms of the stament given below.The organisms should try to maintaince the constancy of its internal enviroment.

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SOLUTION :HOMEOSTASIS
3442.

Question : Use th proper terms of the stament given below.Some organisms are tolerant to a narrow range of salinities.

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SOLUTION :Stenothermal
3443.

Question : Why unleaded petrol used in vehicles fitted with catalytic converters?

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Solution :CATALYTIC CONVERTERS contains metals like platinum, palladium and rhodium. It acts as CATALYSTS to reduce EMISSION of poisonous GASES. These catalysts are inactivated by lead.
3444.

Question : Use of Nano technology in crop production is _________.

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ENVIRONMENTALLY safe
Ecologically sustainable
Economically stable
All the above

Answer :A::B::C::D
3445.

Question : Use of thermostable DNA polymerase from the bacterium Thermus aquatics,made it possible to generate billion copies of DNA in a very short time using a process. (a) Name the Process. (b) Name the three important steps involved in this process.

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Solution :(a) PCR (Polymerase Chain Reaction)
(B) (1) Denaturation
(2) Annealing
(3) EXTENSION / Elongation of PRIMER
3446.

Question : Use of lead- free petrol or diesel is recommended to reduce the pollotanta emitted by automobiles. Whatrole does lead play?

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Solution :Catalytic converters , having EXPENSIVE metals namely platinum , palladium and rhodoum as the CATALYSTS are fitted into automobiles for reducing emission of poisonous gases and to convert unburnt hydrocarbons into `CO_(2) and H_(2)O`.
MOTOR vehicles equipped with catalytic to converter need to use unleaded petrol because lead in the petrol, inactivates the catalyst and increases the hydrocarbon emission , there by harming the environment.
3447.

Question : Use of microbes to recover metal pollutants from contaminated sites________

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SOLUTION :N/A
3448.

Question : Use of lead-free petrol or diesel is recommended to reduce the pollutants emitted by automobiles. What role does lead play?

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Solution :Catalytic converters having expensive metals namely, PLATINUM, PALLADIUM andrhodium as the catalysts are FITTED into AUTOMOBILES for reducing emission of poisonous gases.
They also convert unburnt hydrocarbons into `CO_(2) and H_(2)O`.
Motor vehicles equipped with catalytic to converter need to use unleaded petrol because lead in petrol inactivates the catalyst.
It increases the hydrocarbon emission.
Because of this environment is badly affected.
Lead accumulates in bones, blood and soft organs.
It adversely AFFECTS kidney, liver, nervous systemand other organs.
3449.

Question : Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed

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Recombinant DNA technology
Transgenic mechanism
MUTATION breeding
Gene therapy

Solution :USE of CERTAIN chemicals and radiation to change the base SEQUENCES of genes of crop plants is termed as mutation breeding. Mutations is induced artificially through use of chemicals or radiations like gamma radiations. In mung bean, resistance to yellow mosaic virus and powdery mildew were induced by mutations.
3450.

Question : Use of Cannabis products result in :

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Alteration in perception , thought and feelings
Depressed BRAIN FUNCTION and RELIEF in pain
Suppressed brain function and relief in pain
Stimulation of nervous system,increased alertness and activity

Answer :A