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4001.

Question : Through blood larva of filariasis are transferred to

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LYMPHATIC VESSELS
Lymphatic gland
Blood vessels
Both (A) and (B)

SOLUTION :Both (A) and (B)
4002.

Question : Thrombocytes are cell fragments produced from

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DENDRITIC cells
myeloblasts
megakaryocytes
macrophages

Answer :C
4003.

Question : Three yellow round pea seeds labelled A,B,C were taken and grown into plants. The plants wee crossed to a plant grown from a green wrinkled pea. 100 seeds issuing from each cross were sorted into phenotypic classes as follows. ltbr. i. A: 100 yellow round ii. B:51 yellow round, 49 green round iii. C: 24 yellow round, 26 yellow wrinkled, 25 green round, 24 green wrinkled The genotype ofplant C would be

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YYRR
YyRr
YyRR
YYRr

Answer :B
4004.

Question : Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatement plant were subjected to BOD test. The samples were labelled A, B and C. but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L, 8 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct to each assuming the river water is relatively clean ?

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SOLUTION :If the BOD level of A,B and C are 20 mg/L, 8 mg/L and 400 mg/L, the most POLLUTED one is sample .C. i.e., untreated sewage water. Sample B is the LEAST polluted and it is river water. Sample A is SECONDARY effluent discharged from a treatement plant.
4005.

Question :Three water samples namely river water, untreated sewage water and subjected to BOD test. The samples were labelled A, B and C but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L, 8 mg/L and 400 mg/L respectively, which sample of the water is most polluted ? Can you assign the correct label to each assuming the river water is relatively clean?

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SOLUTION : Sample A - SECOND influent
Sample B - RIVER water Sample
C - Sewage WITHOUT treatment
4006.

Question : Three water samples, namely , riverwater , untreated sewage water and secondary effluent discharged from sewage treatment plant were subjected to BOD test, and The obtained values are 60(mg)/L, 307(mg)/L and 200(mg)/L respectively.

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SOLUTION :307 `(ml)/L` (untrated sewage water).
High BOD represents a LARGE number of microbes and high level of pollution.
BOD refers to the amount of `O_2` that would be consumed if all the organic matter in 1 litre of water were oxidised by BACTERIA.
4007.

Question : Three of the steps of neuro - endocrine mechanism in respect of parturition are mentioned below. Write the missing steps in proper swquence.(a) Signals originate from fully developed foetus and placenta. (b) ………………………………..( c ) …………………….(d) Oxytocin causes strong uterine contraction (e) Uterine contraction stimulates further secretion of oxytocin.(f) .................

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Solution :(b) FOETAL EJECTION reflex
( c ) The reflex triggers RELEASE of oxytocin
(f) Expulsion of the BABY out through birth canal.
4008.

Question : These process are necessary for the complete development of male gametophyte from pollen mother cell.One meiotic and two mitotic devisionsOne meiotic cell division and one meiotic cell divisionTwo meiotic cell division and one mitotic cell divisionTwo meiotic cell division

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ONE MEIOTIC and two mitotic devisions
One meiotic cell DIVISION and one meiotic cell division
Two meiotic cell division and one mitotic cell division
Two meiotic cell division

Answer :A
4009.

Question : What are the three parts of a moss sporophyte?

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ANSWER :FOOT, SETA, CAPSULE
4010.

Question : Three of the following statements about enzymes are correct and one is wrong. Which one is wrong ?

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Enzymes require OPTIMUM pH for maximal activity
Enzymes are DENATURED at high TEMPERATURE but in certain EXCEPTIONAL organism they are effective even at temperature `80^@-90^@`
Enzymes are highly specific.
Most enzymes are proteins but some are lipids.

Answer :D
4011.

Question : Three mile island ,chernobyl incidents are typical example for …………….pollution

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Sound
Radioactivity
Water
Physical

Answer :B
4012.

Question : Three genes a b c show crossing over 20% between a and b, 28% between b and c and 8% between a and c. Swquence of genes will be

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bac
abc
acb
None of the above

ANSWER :A
4013.

Question : Three fatty acids join by condensation with glycerol to form a _____.

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ANSWER :TRIGLYCERIDE
4014.

Question : Three enzymes required to break down lactose into glucose and galactose are

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`BETA` -galactosidase, Permease and Transacetylase
`beta` -galactosidase, Phosphoglucose ISOMERASE and Pyrophosphorylase
Phosphoglucomutase, Permease and GLYCOGEN SYNTHETASE
`beta`-galactosidase, Phosphate-isomerase and Transacetylase

Answer :A
4015.

Question : Three domains of life is based on

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PROTEIN Sequence
16S RRNA GENE sequence
Cell WALL structure
Mode of nutrition

Answer :B
4016.

Question : Three copies of chromosome -21 in a child with Down's syndrome have been analysed using molecular biology technology to detect any possible DNA polymorphism with reference to different alleles located on chromosome -21.Results showed that out of 3 copies 2 of the chromosome of the child contain the same alleles as one of the mohter's alleles .Based on this when did the non-disjunction event mostly likely occur:

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PATERNAL meiosis-I
MATERNAL meiosis-I
Paternal meiosis-II
Matrenal meiosis-II

Answer :B
4017.

Question : Three crops that contribute maximum to global food grain production are :

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WHEAT,RICE,and MAIZE
wheat ,maize ,and sorghum
rice,maize,and sorghum
quantitative TRAIT mulations

Answer :A
4018.

Question : Three codons on mRNA are not recognized by transfer RNA. What are they? What is the general term used for them? What is their significance in protein synthesis?

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Solution :These codons are UAA, UAG and UGA. The general NAME given to these codons is NONSENSE codons. These codons do not specify any amino acid but the termination of polypeptide chain is signalled by them.
4019.

Question : Three children of a family have blood groups A, AB and B. What could be the genotypes of their parents?

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`I^(A)I^(B) `and II
`I^(A)I^(O) and I^(B)I^(O)`
`I^(B)I^(B) and I^(A)I^(A)`
`I^(A)I^(A) and `ii

Answer :B
4020.

Question : Thousands of migratory birds from Siberia visits which part of India ?

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Nal SAROVAR 
MANN sarovar 
Keolado national PARK
Jim corbett national park 

Answer :C
4021.

Question : Three children in a family have blood types O, AB and B respectively. What as the genotypes of their parents ?

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`I^AI^Band II`
`I_(i)^(A)and I_(i)^(B)`
`I^A I^AandI_(i)^(B)`
`I^B I^BandI^A I^A`

SOLUTION :`I_(i)^(A)and I_(i)^(B)`
4022.

Question : threecellsat the______ endin theovuleformsthe eggappatatus .

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SOLUTION :MICROPYLAR
4023.

Question : Though we inherit parental genes, we differ a lot from our parents, justify the statement in one sentence.

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SOLUTION :Though we inherit parental genes, we differ a lot from our parents because there is recombination of paternal and MATERNAL genes and ALSO infrequent mutations at the time of CELL division which cause variations.
4024.

Question : Though the conflict between humans and wildlife started with the evolution of man, the intensity of conflict has increased due to the activities of modern man. Justify your answer with suitable examples.

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Solution :From a study of the history of life on earth through fossil records, we learn that large-scale loss of species like the ONE we are currently witnessing have also happened earlier, even before humans appeared on the scene.
During the long period `(gt 3` billion years) since the origin and diversification of life on earth there were five episodes of MASS EXTINCTION of species.
The .Sixth Extinction. presently in progress is different from the previous episodes.
The difference is in the rates, the current species extinction rates are estimated to be 100 to 1,000 times faster than in the pre-human times and our activities are responsible for the faster rates.
Ecologists warn that if the present trends continue, nearly half of all the species on earth might be wiped out within the next 100 years.
The colonisation of tropical Pacific Islands by humans is said to have led to the extinction of more than 2,000 species of native birds.
The IUCN Red List (2004) DOCUMENTS the extinction of 784 species.
The last twenty years alone have witnessed the disappearance of 27 species.
4025.

Question : Though SCP is a rich protein source , it has not been widely used as food supplement. Point a reason to support this statement.

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Solution :Yes, although SCP is a rich protein SOURCE it is not WIDELY used by most of the PEOPLE in countries due to its HIGHER nucleic acid content and slow digestibility.
4026.

Question : Though mitochondria are absent in the cells, Tricarboxylic acid cycle occurs in

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YEAST cells
Azotobacter
CLOSTRIDIUM
Azolla

Answer :B
4027.

Question : Though Green Revolution has been a resounding success in terms of agricultural production, yet it has failed in its overall social objectives because

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it has not succeeded in making India totally and permanently self-sufficient in food
use of agrochemicals becomes very expensive for indian farmers as WELL as these have harmful effects on envionment
in regional terms, only PUNJAB and Haryana states, and theeastern plains of rivers Ganges in West Bengal STATE,SHOWED reasonably good results, but results were less impressive in other parts of india
all of these

Solution :The development of several high yielding varieties of wheat and rice in 1960 increased yields per unit area. This phase is often called the Green Revolution. However, for farmers in the developing world, agrochemicals are often too expensive, and further increase in yield with existing varieties are not possible USING conventional breeding. Thus, it has not fully succeeded in making india totally self-sufficient in food with only some parts showing impressive results.
4028.

Question : Those seeds which germinate on exposure to light.

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ANSWER :photoblastic SEED
4029.

Question : Those cnidarians which exist in both (polyp and medusa) forms, exhibit

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METAGENESIS
ALTERNATION of GENERATION
POLYMORPHISM
All of the above

Answer :D
4030.

Question : Thorn of Bougainvillea and thendril of Cucurbita are example of :

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Vestigial ORGANS
Retrogressive evolution
ANALOGOUS organs
HOMOLOGOUS organs

ANSWER :C
4031.

Question : Thorn of Bougainvillea and tentrils of Cucurbita represent all of the follwing expect

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Hoology
Divergent evolution
Convergent evolution
Common ancestry

Answer :C
4032.

Question : Thorn of Bougainvillea and tendril of cucurbita are example of

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ANALOGOUS ORGANS
HOMOLOGOUS organs
vestigial organs
RETROGRESSIVE evolution

Solution : homologous organs
4033.

Question : Thorn of Bougainvillea and tendrils of Pisum sativum represent homology. How?

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Solution :The THON of Bougainvillea and the tendrils of Curcurbita and Pisum sativum represent HOMOLOGY. The thorn in former is used as a defence mechanism from GRAZING animals and the tendrils of latter is used as a SUPPORT for climbing.
4034.

Question : Thoracic duct in humans is associated with:

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Arota
Left subclavian
Right subclavin
Hepatic duct

Answer :B
4035.

Question : Thoracic cage of man is formed by

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RIBS and STERNUM
Ribs, sternum and THORACIC vertebrae
Rib, sternum and LUMBAR vertebrae
Ribs and thoracic vertebrae

Answer :B
4036.

Question : Thoracic cage in Human in made up of :-

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RIBS, VERTEBRAL COLUMN and DIAPHRAGM
Ribs, diaphragm
Vertebral column, diaphragm and sternum
Ribs, vertebral column and sternum

Answer :4
4037.

Question : Thoms of Bougainvillea and tendrils of Cucurbila are examples of

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ANALOGOUS organ
homologous organ
vestigial organ
retrogressive evolution

Answer :B
4038.

Question : This uses mimicry as a defence mechanism

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Date Palm
Caladium
OPUNTIA
JATROPHA

ANSWER :B
4039.

Question : This type of symmetry is found in ?

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Hydra , Pleurobrachia , Tapeworm
Tapeworm , EARTHWORM, Cockroach
Hydra , JELLY fish ,Starfish
Sponges , Tapeworm , Nereis

Answer :C
4040.

Question : This tumour normally confined to their original location and do not spread to other parts of the body

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MALIGNANT TUMOUR
METASTASIS
BENIGN tumour
Cancer

Solution :Benign tumour
4041.

Question : This states that an organisms during its development tends to repeat the evolutionary history of its ancestors

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BIOGENETIC law
Biogenetic THEORY
ABIOGENESIS theory
Cosmozoic theory

Answer :A
4042.

Question : This stage of animals that can be compared to a colonial protozoan ancestor

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Blastula
Two LAYERED gastrula
Three layered gastrula
Zygote

ANSWER :A
4043.

Question : This stage of butterflies which is similar to a developmental stage of an annelid indicates the origin of Arthropods from Annelids

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PERIPATUS
Pupa
Caterpillar
Chrysalis

ANSWER :C
4044.

Question : This provides a temperature of -196^(@)C for cryopreservation.

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LIQUID `CO_(2)`
Gaseous NITROGEN
Solid `CO_(2)`
Liquid Nitrogen

SOLUTION :Liquid Nitrogen
4045.

Question : Match of the following

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ANSWER :C
4046.

Question : This stage of animals can be compared to cnidarian (diploblastic) ancestor

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Morula
TWO layered gastrula
Blastula
Three layered gastrula

ANSWER :B
4047.

Question : This plant is ideal to demonstrate ascent of sap

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ROSE plant
Balsam plant
Coconut plant
Cucumber plant

Answer :B
4048.

Question : This person united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritace

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Sutton
Morgan
Corrents
Boveri

Answer :A
4049.

Question : This pedigree is of a rare trait, in which children have extra fingers and toes. Which one of the following patterns of inheritance is consistent with the pedigree?

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AUTOSOMAL recessive
Autosomal dominant
Y-linkage
Sex-linked recessive

Answer :B
4050.

Question : This one is often referred as atherosclerosis

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CAD
angina
hypertension
all of these

Answer :A