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17751.

Question :Discontinuous synthesis of DNA occurs in one strand, because

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DNA MOLECULE being synthesised is very long
DNA DEPENDENT DNA polymearse catalyses POLYMERISATION only in ONE direction (5' `to`3')
It is a more efficient process
DNA ligase has to have a role.

Answer :b
17752.

Question : Discontinuous synthesis of DNA occurs in one strand because :

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DNA molecule being SYNTHESISED is very long
DNA dependent DNA polymearse catalyses polymerisation only in one direction
It is a more efficient process
DNA LIGASE has to have a role

Answer :B
17753.

Question : Directions for Assertion & Reason questions These questions consist of two statements each, printed as Assertion and Reason. While answering these Questions you are required to choose anyone of the following four responses. (A) If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. (B) If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. ( C) If Assertion is True but the Reason is False. (D) If both Assertion & Reason are false. Assertion :- All triploblastic animals are not coelomate. Reason :- Animal with incomplete type of digestive tract are diploblastic.

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If both ASSERTION & Reason are True & the Reason is a CORRECT explanation of the Assertion.
If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
If Assertion is True but the Reason is False.
If both Assertion & Reason are false.

Answer :C
17754.

Question : Disadvantage of MRI is inability to image

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BONE
PARTS of brain
spinal cord
cancerous tissues

Answer :A
17755.

Question : Disaccharides are not the end products of the action of following digestive enzyme

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Cellulase
MALTASE
Amylase
LACTASE

Answer :C
17756.

Question : Direction of nerve impulse is reversed in nerve with

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Axo-axonic
Axo-dendritic
Axo-somatic
Axo-myotic

Answer :A
17757.

Question : Direction of mountain determines the richness of vegetation - Justify.

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Solution :North and south faces of mountain or hill possess different types of flora and fauna because thev differ in their humidity, rainfall, light INTENSITY, light duration and temperature regions. The two faces of the mountain or hill receive different amount of solar radiation, wind action and rain. Of these two faces, the windward region POSSESSES good vegetation due to HEAVY RAINS and the leeward region poSsesses POOR vegetation due to rain shadows (rain deficit).
17758.

Question : Direct application of genetic knowledge for the improvement of human races

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Disgenics
Eugenics
Duphenics
Eutheics

Answer :B
17759.

Question : Diptheria is connected with :

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Lung
Throat
Blood
Liver

Answer :B
17760.

Question : Diploid number of chromosomes in Man, Black molish and Privet Hedge is :-

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44
48
46
42

Answer :C
17761.

Question : Diphtheria is characterised by

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GUM bleeding
Suffocation
Hydrophobia
Dehydration.

Answer :B
17762.

Question : Dioecious plant which prevents both autogamy and geitonogamy(A) Castor(B) Maize(C) Papaya(D) Palms

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Castor
Maize
Papaya
Palms

Answer :C
17763.

Question : Diphragm

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Solution :Location : It is a membrane used to cover cervix in vagina of FEMALE during COITUS.
Function : PREVENT PREGNANCY.
17764.

Question : Dinosaurs were dominant during

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JURASSIC
CRETACEOUS
Traissic
Palaeocus

Solution :N//A
17765.

Question : Dinomitosis occurs in:-

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PROCARYOTES
Mesokaryotes
EUCARYOTES
AKARYOTES

ANSWER :B
17766.

Question : Dinoflagellates are called fire algae due to which character :-

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They APPEAR like FIRE DUE to PIGMENTS
They produce fire due to friction
They occur on burnt places
They SHOW biolumiescene

Answer :D
17767.

Question : Dilip and Mohsinmeasured their blood pressure. Dilip's B.P. is 120//80 mmHg and Mohsin's B.P. is 160//100 mmHg. Who is suffering from hypertension? What are its causes?

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Solution :Mohsin is suffering from hypertension because his BP values are `160//100` mmHg.
1. Atherosclerosis or arteriosclerosis can cause narrowing of LUMEN of arterties and hence there is rise in B.P.
2. Obsity is one of the major trigger for hypertension. Diet rich in fatty food and high cholesterol causes hypertension.
3. Stress in any form, either physical or emotional can cause hypertension.
4. Addictions such as lcoholism and smoking can cause rise in B.P.
5. Hormonal disturbances such as increased secretion of RENIN, epinephrine and aldosterone can cause rise in BP.
17768.

Question : Dimethyl sulphoxide is a………………

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a) Solidifying AGENT
B) CRYOPROTECTANT
C) Fusogenic agent
d) Stimulant

Answer :B
17769.

Question : Dilute solutions have more osmotic potentials due to

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More number solute molecules
More number of solvent molecules and less number of solute particles
More REDUCTION in the capacity of WATER to do work
More DECREASE in the FREE ENERGY of water molecules

Answer :B
17770.

Question : Dikaryophase is observed in

Answer»

Aspergillus
Rhizopus
Agaricus
Both (1) and (3)

ANSWER :D
17771.

Question : Dihybrid test cross ratio with 82% parental type and 18% recombinants type shows that genes have

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INCOMPLETE linkage
Complete linkage
Independent assortment
Double CROSSING over

Answer :A
17772.

Question : Dihybrid cross explains

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LAW of dominance
purity of GAMETES
INDEPENDENT ASSORTMENT
law of segregation

Solution :independent assortment
17773.

Question : Digestive system is complete where

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Digestive GLANDS are present
Digestion OCCURS in the cavity
Both MOUTH and ANUS are present
Digestion occurs in the individual cells

Answer :C
17774.

Question : Digrammatically represent the experimental steps in cloning and expressing a human gene (say the gene for growth hormone ) into a bacterium like E.coli?

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SOLUTION :Isolate gene for growth hormone
`darr`
clone into a PLASMID DNA `RARR`
TRANFORM into E COIL .
`darr` The growth hormone accumulates in the E. coil cell .
17775.

Question : Digestive juice lacking enzyme but aiding in digestion is:

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Chyle
Chyme
Bile
Succus entericus

Answer :C
17776.

Question : Digestive enzymes are

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Hydrolases
Lyases
Dehydrogenases
Transferases

Answer :A
17777.

Question : Digestion of proteins is completed in :

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Stomach
Small intestine
Colon
Caecum

Answer :B
17778.

Question : In human beings, the digestion of proteins starts in which part of the alimentary canal?

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MOUTH
DUODENUM
STOMACH
lieum

ANSWER :C
17779.

Question : Digestion in Hydra occurs

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Intracellularly in gastrodermal cells only
Extracellularly in gastro-vascular cavity followed by INTRACELLULAR DIGESTION within gastrodermal cells
Extreacellularly in GASTROVASCULAR cavity only
Intracellular in gastrodermal cell followed by EXTRACELLULAR digestion in coelenteron

Answer :B
17780.

Question : Digested lipids are absorbed from lacteals as

Answer»

Teriglycerids
Diglycerides
Monoglycerides
Free FATTY ACIDS

ANSWER :A
17781.

Question : Diffusion of oxygen in tissues of cockroach occurs through:

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Blood
Integument
Tracheae
Tracheole

Answer :D
17782.

Question : Diffusion membrane is made up of

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THIN SQUAMOUS EPITHELIUM of alveoli
Endothelium of alveolar capillaries
Basement membrane
All the above

Answer :D
17783.

Question : Diffusion isiof

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One substance DEPENDS on ANOTHER substance
The only means of GASEOUS MOVEMENT in plants
An energy dependent process
Solid is more common than gases or liquids

Answer :B
17784.

Question : Diffusion is important for plants as it is the only means for movement of .............. within the plant body.

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Gases
Organic Nutrients
Minerals
Water

Answer :A
17785.

Question : Diffusion and osmosis are included under_____transport.

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ANSWER :PASSIVE
17786.

Question : Difficulty in breathing on high mountains is due to

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DECREASE in `pO_2`
INCREASE in `CO_2` concentration
Decrease in AMOUNT of `O_2`
All of these

ANSWER :A
17787.

Question : Difficulty in breathing causes wheezing due to constriction of bronchi and bronchioles in case of

Answer»

Asthma
Emphysema
Bronchitis
Pneumonia

ANSWER :A
17788.

Question : Differntiate between stenohaline and euryhaline organisms.

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Solution :EURYHALINE:Organisms tolerant in wide range of SALINITIES.
Stenohaline : :Organisms tolerant to NARROW range of salinities.
17789.

Question : Differnces in amino acids is due to their _____ group.

Answer»


ANSWER :R
17790.

Question : Differentiation of organs and tissues in a developing organism is associated with

Answer»

DEVELOPMENTAL mutation
differential EXPRESSION of genes
lethal mutations
deletion of genes

Answer :B
17791.

Question : Differentiated cells:Heart cells ::Undifferentiated cells:______

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SOLUTION :STEM CELLS.
17792.

Question : Differentiated cell arrests at which stage:

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`G_1`
`G_2`
`G_0`
M phase

Answer :C
17793.

Question : Differentiate Translocation and Crossing over.

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SOLUTION :
17794.

Question : Differentiate the following and give examples of each. a. Innate and acquired immunity b. Active and passive immunity

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SOLUTION :a. The non-specific type of defence, that is PRESENT at the time of birth is CALLED innate immunity. The resistance that an individual acquires during his life is KNOWN as acquired immunity.
b. The antibodies produced in an animal.s own body following its exposure to an antigen is called active immunity. When ready-made antibodies are directly given to protect the body against foreign agents, it is called passive immunity.
17795.

Question : Differentiate Symmetric and Asymmetric cuts of restriction enxymes .

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SOLUTION :
17796.

Question : Differentiate spermiogenesis and spermiation.

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SOLUTION :
17797.

Question : Differentiate secretory and invasive tapetum.

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SOLUTION :
17798.

Question : Differentiate seasonal breeders from continuous breeders.

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Solution :Seasonal breeders : Reproductively active only during favourable seasons in their reproductive PHASE are CALLED seasonal breeders.
Continuous breeders : Many MAMMALS are reproductively active THROUGHOUT their reproductive phase are called continuous BREEDER.
17799.

Question : Differentiate Rhizofilration and Rhizostimulation .

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SOLUTION :Both are BIOREMDIATION TECHNOLOGIES .
17800.

Question : Differentiate Primary succession and Secondary succession.

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Solution :`{:("PRIMARY succession","Secondary succession"),("Devoloping in an barren area.","Developing in disturbed area."),("Initiated dues to BIOLOGICAL or any other","Starts dues to ecternal factors only."),("EXTERNAL factors",""),("No SOIL, while primary succession starts","It starts where soil covers is already present."),("Pioneer species come from outside","Pioneer species develop from existing"),("environment.","environment."),("It makes more time to complete.","It takes comparatively less time to complete."):}`