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19301.

Question : Comment on Biosafety.

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Solution :Biosafety is the prevention of large-scale loss of biological integrity, focussing both on ecology and human health. These prevention mechanisms INCLUDE conduction of regular reviews of the biosafety in laboratory settings, as well as strict guidelines to follow. Biosafety is used to protect from harmful incidents. MANY laboratories HANDLING biohazards employ an ongoing risk management assessment and enforcement process for biosafety. Failures to follow such protocols can lead to INCREASED risk to exposure to biohazards or pathogens. Human error and poor tecniques contribute to unnecessary exposure to hazards and compromise the best safeguards set into place for protection.
19302.

Question : What is Bio-magnification?

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Solution :When non-degradable substances enter the food chain, they do not get metabolized or broken down or expelled and instead get transferred up the tropic LEVELS of the food chain. During this process, they show an increase in concentration which is referred to as biomagnification. This results in increased toxicity and MAY even be LETHAL. This PHENOMENON is well ESTABLISHED for mercury and DDT.
19303.

Question : Comment on Aleurone tissue.

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Solution :Aleurone Tissue consists of highly specialised CELLS of one or few layers which are found around the endosperm of cereals(Barley and MAIZE)
(ii) Aleurone grain contain spherosomes.
(iii) During seed germination cells secrete certain hydrolytic enzymes like AMYLASES.
(iv) Proteases which digest reserve food material are present in endosperm cells.
19304.

Question : Commentof Broodparasitism

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SOLUTION :Hereparasiticbirdlaysits eggin the nestof itshostandletsthe hostincubatetheme.g.Cuckoo
19305.

Question : Write a brief note on Biolistics.

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SOLUTION :BIOLISTICS : BOMBARDED into the target tissue or CELLS using a particle gun (also called as gene gun/micro projectile gun/ shotgun).
(ii) Then the bombarded cells or tissues are cultured on selected medium to REGENERATE plants from the transformed cells .
(iii) It is method of Direct gene transfer .
19306.

Question : Comment : Compressed Natural Gas (CNG) is better than diesel

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Solution :CNG is considered a better fuel because it burns most efficiently, is cheaper and cannot be siphoned off by THIEVES and adulterated by petrol or DIESEL.
Use of CNG in automobiles because it burns more efficiently and LITTLE of it is LEFT unburnt. It is also cheaper
Use of unleaded petrol
Use of catalytic converter in the vehicles as it reduces emission of poisonous gases.
19307.

Question : Commelina, viola and oxalis that carries both chasmogamous and cliestogamous flowers. Give the significance of Cliestogamy

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SOLUTION :1) It ENSURES SELF pollination.
2) PURITY of characters is MAINTAINED
19308.

Question : Commelina, viola and oxalis that carries both chasmogamous and cliestogamous flowers. Find out the main differences between them.

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Solution :Chasmogamous flowrs with EXPOSED ANTHERS and STIGMA. CLEISTOGAMOUS flowers do not open at all.
19309.

Question : Columns of Bertini are present between

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renal CORTEX and MEDULLA
BOWMAN's capsules
renal pyramids
kidney and urinary bladder

Answer :C
19310.

Question : Column I represent the size of the soil particles and Column II represents type of soil components. Which of the following is correct match for the Column I and Column II.

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`{:(I,II,III,IV),(ii,iii,iv,i):}`
`{:(I,II,III,IV),(iv,i,iii,ii):}`
`{:(I,II,III,IV),(iii,ii,i,iv):}`
NONE of the above

Solution :`{:(I,II,III,IV),(iii,ii,i,iv):}`
19311.

Question : Column I represent the size of the soli particles and column II represents type of soli components. Which of the following is correct match for the column I and column II.Column IColumn IIA. 0.2 to 2.00mm-(i) SlitB. Less than 0.002 mm-(ii) ClayC. 0.02 to 0.2 mm-(iii) Coarse and particle D. 0.002 to 0.02 mm-(iv) Fine sand particle

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iiiiiivi
iviiiiii
iiiiiivi
NONE of the above

Solution : I-iii, II-ii,III-iv,IV-i
19312.

Question : Columbia located near the equator has nearly 1400 species of birds ,while new york at 41^@ N has 105 species and greenland 70^@N only 56 species give two reasons for this variation in biodiversity.

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Solution :BIODIVERSITY varies with changes in LATTITUDE and altitude.Biodiversity decreases from equator towards the poles and from low ELEVATION to high ATTITUDES.
19313.

Question : Columella is a specialised structurefound in the sporangium of

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ULOTHRIX
Rhizopus
Spirogyra
None of these

Solution :(B) In Rhizopus, the CENTRAL non-sporiferous region of sporangium is called COLUMELLA.
19314.

Question : Colourless sulphur bacteria, e.g. Beggiatoa oxidies H_(2)S to

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oxidised SULPHUR
REDUCED sulphur
elemental sulphur
NONE of these

ANSWER :C
19315.

Question : Colouredrock -paintings were presumably firstmade by

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Cro- MAGNON MAM
NEANDERTHAL MAN
JAVA ape man
Peking man

Answer :A
19316.

Question : Coloured porphyrin compounds containing iron exclusively for electron transport.

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ANSWER :CYTOCHROME
19317.

Question : Colour of colostrum fluid is ..........

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white
red
YELLOW
colourless

SOLUTION :yellow
19318.

Question : Colour of Bougainvillea flower is due to colour of its

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COROLLA
BRACTS
Calyx
Androecium.

Answer :B
19319.

Question :Colour blindness is a recessive trait. A couple with normal vision has two sons - one colourblind and one with normal vision. If the couple has two daughters, what proportion of them will have normal vision?

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Solution : As the couple is with NORMAL vision, the mother is CARRIER for the GENE. Therefore, both their daughters will have normal vision but with a possibility of 50% being carrier for colour blindness. It is clear from the GIVEN CROSS:
19320.

Question : Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains

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NATURAL KILLER cells
Monocytes
Macrophages
IMMUNOGLOBULIN A

ANSWER :D
19321.

Question : Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains :

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NATURAL KILLER cells
Monocytes
Macrophages
ImmunoglobulinA

Solution :IMMUNOGLOBULIN A
19322.

Question : Colostrum secreted by mother during initial days of lactation has abundant ___________antibodies

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`I_gG`
`I_gA`
`I_gE`
`I_gD`

ANSWER :B
19323.

Question : (a) Explain the statement that color blindness is perfect example for criss -cross inheritance with a flowchart.

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Solution :A marriage between a COLOUR blind man and a normal visioned WOMEN will produce normal visioned male and FEMALE INDIVIDUALS in `F_(1)` generation but the females are CARRIES. The marriage between a `F_(1)` normal visioned carrier women and a normal visioned male will produce one normal visioned female, one carrier female, one normal visioned male and one colour blind male. Colour blind trait is inherited from the male parent to his grandson through carrier daughter, which is an example of criss-cross pattern of inheritance.
19324.

Question : Colostrum is :-

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The MILK PRODUCED during the initial few DAYS of lactation
Rich in protein and fats
Contains SEVERAL antibodies
All of the above

Answer :D
19325.

Question : Colostrum has abundant antibodies ………

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IG M
I G G
Ig A
Ig E

Answer :C
19326.

Question : Colostrum released by breasts after child birth is very essential. Why?

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Solution :It contains ANTIBODIES which provide PASSIVE immunity to the NEWBORN. These antibodies combat infections in the baby who still has to BUILD up its own antibodies.
19327.

Question : Colletotrichum falcatum is causative organism of

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RED STRIPE of sugarcane
Red ROT of sugarcane
Black rot of crucifers
Bacterial blight

Answer :B
19328.

Question : Colocasia is the example of :

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Rhizome
Bulb
Tuber
Corm

Answer :D
19329.

Question : Collenchyma diifers from sclerenchyma in :-

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RETAINING PROTOPLASM at maturity
Having THICK walls
Having a WIDE lumen
Being meristematic

Answer :A
19330.

Question : Collenchyma is :

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LIVING and contains protoplasm
Dead and hollow
Dead and filled with RESERVE FOOD
Living and contains no reserve food

ANSWER :A
19331.

Question : Collenchyma differs from parenchyma

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as it forms the MAJOR COMPONENT of plant organs
because it found in monocot plant
as it has generally ISODIAMETRIC cells
because cells are thickened at the CORNERS

Answer :D
19332.

Question : Collection of forest products , harvesting of timber tilling of land and private ownership are allowed in

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ANSWER :A
19333.

Question : Collecting of W.B.Cs at the injury site occurs due to:

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Phagocytosis
Haemolysis
Diapedesis
Haemopoiesis

Answer :C
19334.

Question : Collect 5 examples of palindromic DNA sequences by consulting your teacher. Better try to create a palindromic sequence by following base-pair rules.

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Solution :Palindromic sequence is same in DNA and opposite to each other. have restriction(A) `5.- "GGATCC" -3., 3.-"CCTAGG"-5.`
(B) `5.-"AAGCTT"-3., 3.-"TTCGAA"-5.`
(C) `5.-"ACGCGTS"-3., 3.-"TGCGCA"-5.`
(D) `5.-"ACTAGT"-3., 3.-"TGATCA"-5.`
(E) `5.-"AGGCCT"-3., 3.-"TCCGGA"-5.`
19335.

Question : Collect 5 examples of palindromic sequences by consulting your teacher. Better try to create palindromic sequence by base pair rules.

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SOLUTION :
19336.

Question : Collect 5 examples of palindromic DNA sequences by consulting your teacher. Better try to create a palindromic sequence by following base-pair rules

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SOLUTION :`{:("5.-GAATTC-3.5.-GGTACC-3.5.-GGCC-3."),("3.CTTAAG-5.3.-CCATGG-5.3.-CCGG-5."),("5.-GACGTC-3.5.-TTCGAA-3."),("3.-CTGCAG-5.3.-AAGCTT-5."):}`
19337.

Question : Collagen fibres are

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UNBRANCHED and inelastic
Branched and inelastic
Unbranched and elastic
Branched and elastic

Answer :A
19338.

Question : Collagen and elastin are formed by

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Macrophages
Fibroblast
Mast cell
Chondrocytes

Answer :B
19339.

Question : Define:- Coleorrhiza

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SOLUTION :Embryonal axis as its lower END POSSESSES radical and rootcap ENCLOSED in an UNDIFFERENTIATED sheath called colerrhiza
19340.

Question : Cold-blooded animals are those which:

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are COLD to touch
have cold blood
live in cold environment
cannot REGULATE their BODY temperature

Answer :D
19341.

Question : Coleoptile : Plumule _____ : Radicle

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SOLUTION :COLEORRHIZA
19342.

Question : Coitus is not necessary for induction of ovulation, such a female is called :-

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INDUCED ovulator
Spontaneous ovulator
Reflex ovulator
All of the above

Answer :B
19343.

Question : Colchicine brings about:

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CHROMOSOME aberrations
Duplication of chromosomes
Gene mutations
Quick replication

Answer :B
19344.

Question : Coiling of graden pea tendrils around any support is anexampleof

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Thigmotaxis
Thigmonasty
Thigmotropism
Thermotaxis

ANSWER :C
19345.

Question : Cohesion-tension-transpiration pull model explain that water is mainly 'pulled' through the plant.

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ANSWER :1
19346.

Question : Coiling of chromonema in prophase of mitosis is-

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Plectonemic
Paranemic
HELICAL
IRREGULAR

ANSWER :B
19347.

Question : Cohesive ends are .........

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a) BLUNT ends
B)FLUSH ends
C) Sticky ends
d) Symmetric cuts

Answer :C
19348.

Question : Cohesion theory of ascent of sap was proposed by:

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Dixon
Bose
Pristley
Atkins

Answer :A
19349.

Question :Cohesion-tension theory explains stomatal movement.

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ANSWER :ASCENT of SAP
19350.

Question : Cohesion , Adhesion & surface tension physical properties of water, provide which of the following properties (Characteristics) in water column ?

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Transpiration pull & TENSILE strength
Tensile strength and CAPILLARITY
Capillarity & TRANPIRATION pull
All the above

Answer :B