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14351.

Question :The portion of DNA which contains information for an entire polypeptide is called :

Answer»

MUTON
Codon
Operon
Cistron

Answer :D
14352.

Question : Length of haploid content of human DNA is

Answer»

5386 BP `XX 3.4 A^0`
48502 bp `xx 3.4 A^0`
`4.6 xx 10^6` bp `xx 3.4 A^0`
`3.3 xx 10^9 bp xx 3.4 A^0`

ANSWER :D
14353.

Question : Length of day and night periods that rgulates flowering is:

Answer»

DARK period
Phototropism
Photonasty
photoperiodism

Answer :A
14354.

Question : Length of alimentary canal of man is:

Answer»

16 feet
6 feet
2 feet
32 feet

Answer :D
14355.

Question : Length of Adult male filarial worm is ……………

Answer»

40 MM
80 mm
70 mm
60 mm

SOLUTION :40 mm
14356.

Question : Legumes fertilise the soil but cereals do not, why?

Answer»

Solution :The roots of LEGUMES have NODULES, where nitrogen is fixed by SYMBIOTIC bacteria Rhizobium. This fixed nitrogen fertilises the SOIL. The cereals, on the contrary, do not possess such nitrifying bacteria. Therefore, they do not fertilise the soil.
14357.

Question : Introductionof some alien species causes biodiversityloss. Justify the statementwith an example .

Answer»

Solution :Alien species whenintroduced CAUSED DESTRUCTIONOF thenativespecies .
Nileperch introduced into LakeVictoria causedthe destructionof the nativeanimal species .
The Eichhornia speciesintrouduced from Australiacuased HAVOC byits extensive growth.
Lantanaand otherplant speciescausedour NATIVE biodiversityloss .
African catfish carries (Clarias gariepiuns) caused destructionand lessen the nativecichliedfish .
14358.

Question : Legs attain their proper proportionate size in human beings at the age of

Answer»

Birth
Two years
Ten years
18 years

Answer :C
14359.

Question : Leg - hemoglobulin is produced in response to

Answer»

Respiration 
PHOTOSYNTHESIS 
Fatty acid SYNTHESIS 
`N_(2)` fixation 

SOLUTION :`N_(2)` fixation
14360.

Question : Leghaemoglobin occurs in:

Answer»

Coralloid
BGA
Around bacteriods
Mycorrhiza

Answer :C
14361.

Question : Legalized marriageable age of female in India is……………

Answer»

19 years
20 years
18 years
21 years

Solution :18 years
14362.

Question : Left systemic arch is present in_______.

Answer»


ANSWER :MAMMALS,
14363.

Question : Leech secretes which of the following anticoagulants ?

Answer»

Hirudin
Heparin
Serotonin
Histamine

Answer :A
14364.

Question : Introduction of genetically modified food is not desirable because

Answer»

It will AFFECT ECONOMY of developing countries
The products are LESS tasty
They are costly
There is DANGER of entry of toxins and virus in foood.

Answer :D
14365.

Question : Lederberg's replica plate experiment proves that:

Answer»

PRE existed ADVANTAGEOUS mutations provide the selective ADVANTAGE to individuals in the CHANGED environment
Mutations appear after change in environment and provide selective advantage
Both CONCLUSIONS are correct
Change in environment doesn't affect the populations

Answer :A
14366.

Question : Lederberg's replica experiment demonstrates

Answer»

adaptations
evolution
genetics
artificial selection

Answer :A
14367.

Question : Lederberg replica experiment explains :

Answer»

MUTATION THEORY
DARWIN's theory
Lamarck's theory
None of these

Solution :N/A
14368.

Question : Lederberg and Lederberg demonstrated that mutations are preadaptive. They used the following technique for the purpose

Answer»

REPLICA PLATING
GENE sequencing
Transduction
TRANSFORMATION

ANSWER :A
14369.

Question : Introduction of foreign gene for improving genotype is

Answer»

TISSUE CULTURE
Vernilization
Biotechnology
GENETIC ENGINEERING

Solution :Genetic engineering
14370.

Question : Leaves of whichof the followingplantsare not used for therearingof silkworms ?

Answer»

MULBERRY
Castor
OAK
Teak

SOLUTION :Castor PLANTS are not used for rearingof silkworms. Castoroil has MANY uses in medicine and other applications.
14371.

Question : Introduction of an exotic breed destroyed a lawn. What may be the name of possible species?

Answer»

Solution :Congress GRASS (Parthenium species) and LANTANA camara can be the EXOTIC species that have destroyed the LAWN.
14372.

Question : Introduced species can have deleterious effects on biological communities by :

Answer»

DISPLACING NATIVE SPECIES
Preying on native species
Competing with native species for FOOD / shelter
All of the above

Answer :D
14373.

Question : Intrinsic factor,essential for absorption of vitamin B_12 is secreted by

Answer»

CHIEF cells
Peptic cell
Oxytocin cells
Mucous cells

Answer :C
14374.

Question : Intra-uterine devices (IUDs) are used to preventSperm to reach ovurnsperm to reach femaleSperm from leaving testesall of these

Answer»

SPERM to REACH ovurn
sperm to reach female
Sperm from LEAVING testes
all of these

Answer :A
14375.

Question : Leaves of Mosses and Ferns are :-

Answer»

ANALOGOUS and HOMOLOGOUS both
Analogous but not homologous
Homologous but not analogous
None of the above

ANSWER :B
14376.

Question : Intra uterine devices (IUDs) are inserted by doctors or expert nurses in the uterus through vagina. These IUDsare presently available as the non- medicated IUDs (e.g., ________1_____________), copper releasing IUDs (____________2______________) and the hormone releasing IUDs (_____________3________________ ).

Answer»




ANSWER :B
14377.

Question : Intra testicular genital duct system includes:-

Answer»

Tubuli recti, RETE TESTIS and Vasa efferentia
Tubuli recti, VAS DEFERENS and ejaculatory DUCT
Urethra, epididymis and Tubuli recti
Seminal vesicle, ejaculatory duct and ampulla

Answer :A
14378.

Question : Leaves modify into small, sharp-pointed structures in

Answer»

ALOE
Citrus
Bougainvillea
Pistia

Answer :A
14379.

Question : Into which stage Schizont is converted by asexual reproduction ?

Answer»

SPOROZOITE
MEROZOITE
Trophozoite
Microzoite

SOLUTION :Merozoite
14380.

Question : Leaves not only produce food but also produce young ones. Justify with one example.

Answer»

Solution :Insome PLANTS, leaves are organ of vegetative propagation i.e NEW plants are FORMED from leaf MARGINS .eg-Bryophyllum.
14381.

Question : Intra specific hybridization is also termed as ………. .

Answer»

a) Intravarietal hybridization
B) intervarietal hybridization
c) INTERSPECIFIC hybridization
d) intergeneric hybridization

Answer :B
14382.

Question : Leaves are used for vegetative propagation in (A) solanum sp. (B) brassica sp. (C) kalanchoe sp. (D) opuntia sp.

Answer»

SOLANUM SP.
BRASSICA sp.
kalanchoe sp.
OPUNTIA sp.

Answer :C
14383.

Question : Into what solar energy is transformed by photosynthesis.

Answer»

FREE ENERGY
Physical energy 
CHEMICAL energy 
 NONE of the above 

SOLUTION :Chemical energy
14384.

Question : Least cuticular transpiration is relatively observed in

Answer»

Xerophytes
Hydrophytes
Mesophytes
Lithophytes

Answer :A
14385.

Question : Into what microbes are grown for production in Industrial field ?

Answer»

SOLUTION :Even in Industry, microbes are used to SYNTHESISE a NUMBER of products VALUABLE to human beings. Beverages and antibiotics are some of examples. Production on an industrial scale, requires GROWING microbes in very large vessels called fermentors.
14386.

Question : Into what cleistogamous flowers are seen ?

Answer»

Voyella
Oxalis
Comelina
All of the above

Answer :D
14387.

Question : Least water potential is observed in

Answer»

Soil
Plant
Atmosphere
Outer space

Answer :C
14388.

Question : Into how many chambers is the heart of cockroach divided?

Answer»


ANSWER :13
14389.

Question : Learning is related to _____ part of human brain.

Answer»

Cerebrum
Cerebellum
Optic lobes
Arborvitae

Answer :A
14390.

Question : Intine is composed of

Answer»

CHITIN and pectin
Cellulose and pectin
Cellulose and hemicellulose
Lignin and pectin

Answer :B
14391.

Question : Intine: cellulose and pectin Exine: _____

Answer»

SOLUTION :SPOROPOLLENIN
14392.

Question : Leafy gametophore in mosses consist of upright, slender axes bearing

Answer»

Leafy gametophore in MOSSES CONSIST of upright, slender axes BEARING
 Oppositely arranged leaves
UNICELLULAR gametangia
 Unicellular rhizoids

Answer :A
14393.

Question : Intestinal villi are more numerous and larger in the jejunum than the duodenum because -

Answer»

Digestion is rapid in the posterior part.
Absorption is rapid in the LATER part.
More ENZYMATIC ACTIVITY in the posterior part.
More BLOOD supply in the posterior part.

Answer :B
14394.

Question : Interstitial cells of testis produce hormone for the development of secondary sexual character in males

Answer»

Testosterone
Progesterone
Thyroxine
FSH

Answer :A
14395.

Question : Leafless stem of onion which is produced to bear flowers is called:

Answer»

SCAPE
TORUS
THALAMUS
Pedicel

Answer :A
14396.

Question : Interspecific hybridisation is the mating of

Answer»

animals WITHIN same breed without having common ANCESTORS
two DIFFERENT related species
superior males and females of different breeds
more closely related INDIVIDUALS within same breed for 4-6 generations

Solution : two different related species
14397.

Question : Tendril of pisum is the modification of :

Answer»

Smilax
Gloriosa
Nepenthes
Pisum

Answer :D
14398.

Question :Interspecific crosses are rare in nature and intergeneric crosses almost unknown. Why?

Answer»

Solution :The CROSSES between TWO DIFFERENT SPECIES are called interspecific crosses. As two species are REPRODUCTIVELY isolated, the interspecific hybrid is sterile (like mule). Intergenic hybrids are almost non-viable hence intergenic hybrids are almost unknown.
14399.

Question : Internodal elongation is associated with:

Answer»

Auxin
Cytokinin
Gibberellin
ABA

Answer :C
14400.

Question : Interneurons are located in the

Answer»

SYMPATHETIC nervous SYSTEIN
CENTRAL nervous system
Somatic nervous system
Parasympathetic nervous system

Answer :B