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16951.

Question : Given below is an incomplete flowchart showing influence of hormones on gametogenesis in human females. Study it carefully and identity A,B,C and D.

Answer»


ANSWER :B
Discussion
16952.

Question : Given below is an incomplete flow chart showing the process of producation of nematode resistant tobacco plants based on RNAi technique.(b)At which level RANi silence the gane?

Answer»


ANSWER :(2) RNAI silences the gene at TRANSLATION LEVEL
Discussion
16953.

Question : Given below is an incomplete flow chart showing influence of hormone on gametogenesis in male, observe the flow chart carefully and fill in the blank A, B, C and D.

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SOLUTION :A = TESTOSTERONE, B = SPERMIOGENESIS
C = Sertoli cells, D = Spermiogenesis
Discussion
16954.

Question : Given below is an imaginary pyramid of number Which of the following could be a possibility regarding it ?

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LEVEL PC is INSECTS and level SC is small insectivorous birds
Level PP is phytoplanktons in sea and WHALE on TOP level TC
Level PP is pipal trees and the level SC is sheep
Level PC is rats and level SC is cats

Answer :A
Discussion
16955.

Question : Given below is an enlarged view of one microsporangium of an anther. Name the labelled wall layers A, B, C. (b ) Mention the characteristics and function of the cells forming the wall layer 'C'

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Solution :(a) A- Endothecium
- Middle layers
C - Tapetum
(B) The cells of tapetum possess dense cytoplasm and more than ONE nucleus. It acts as nutritive tissue and provides nutrients for developing POLLEN GRAINS.
Discussion
16956.

Question : Given below is an electron acceptor. Mention its status which is labelled as a Cyt^(++)overset(2e)rarrCyt^(+++)a

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Oxidised
Reduced
Phosphorylation
Hydrated.

Solution :N//A
Discussion
16957.

Question : Given below is a typical agarose gel in which electrophoresis had occurred In this agarose gel -

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LANE - 1 shows MIGRATION of digested DNA fragments
Only Lane - 4 shows migration of digested DNA fragments
Lane - 2 to 4 shows migration of digested set of DNA fragments
Wells are always PLACED towards positive ELECTRODE during electrophoresis

Answer :C
Discussion
16958.

Question : Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks

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ANSWER :C
Discussion
16959.

Question : Given below is a simplified model of a nutrient cycling in a terrestrial ecosystem. Identify the cycle ?

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SOLUTION :PHOSPHOROUS CYCLE
Discussion
16960.

Question : Given below is a sequence of alphabets representing the genes of chromosome. Observe it and answer the questions. A - B - C - D - E - F - G - H - I - J - K . (a) Write the sequence of genes after the chromosome undergoes terminal deletion of single gene. (b) What will be the gene sequence, if the genes E and F undergoes tandem duplication ? (c) Consider the centromere is located between the genes F and G and write a gene sequence , after parametric inversion occurs in between the genes C, D and E.

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Solution :(a) B - C - D - E - F - G - H - I- J - K (or) A - B - C - D - E - F - G - H - I - J
(b) A - B - C - D - E - F - F - G -H - I - J - K .
(c) A - B - E - D - C - F - G - H - I - J - K .
Discussion
16961.

Question : Given below isa simplified model of phosphorus cycling in a terrestrial ecosystem with fourblanks (P-S) . Identify the blanks :

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P `rarr` Rockminerals, Q'rarr'Detritus, R`rarr`LITTER fall, S`rarr`PRODUCERS
P `rarr` Litter fall, Q'rarr'Producers, R`rarr`Rockminerals, S`rarr`Detritus
P`rarr`Detritus, Q'rarr'Rockminerals , R`rarr`Producers, S`rarr`Litter fall
P`rarr`Producers , Q'rarr'Litter fall , R`rarr`Rockminerals, S`rarr` Detritus

Answer :C
Discussion
16962.

Question : Given below is a simplified model of a nutrient cycling in a terrestrial ecosystem. How does it differ from a gaseous cycle?

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Solution :This cycle STARTS from earth.s crust ( lithosphere ) but GASEOUS cycle EXISTS in atmosphere
Discussion
16963.

Question : Given below is a section of maize grain. Identify 'A' and state its function.

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SOLUTION :A' is endosperm.It PROVIDES NUTRITION to the DEVELOPING EMBRYO.
Discussion
16964.

Question : Given below is a section of a Maize grain. Identify 'A' and state its function.

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SOLUTION :A' is coleoptide. It is a FOLIAR STRUCTURE and ENCLOSED the EPICOTYL.
Discussion
16965.

Question : Given below is a schematic representation with circles and squares, which shows four factors/processes that influencing population density. Write the positive factors in circles and negative factors in squares.

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SOLUTION :
Discussion
16966.

Question : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite stands. What is so special shown in it ?5'––––––––GAATTC––––––5'3'––––––––CTTAAG––––––5'

Answer»

REPLICATION completed
Deletion mutation
Start CODON at the 5' end
Palindromic SEQUENCE of BASE pairs

Answer :D
Discussion
16967.

Question : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5' _____________ GAATTC' ___________3' 3' __________ CTTAAG _____________ 5'

Answer»

REPLICATION completed
Deletion mutation
Start CONDON at the 5' end
Palindromic SEQUENCE of base pairs

Answer :D
Discussion
16968.

Question : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it ? 5'"______GAATTC_______"3' 3'"______CTTAAG_______"5'

Answer»

Replication completed
DELETION mutation
START codon at the 5' end
Palindromic sequence of BASE pairs

Solution :Palindromic sequence of base pairs
Discussion
16969.

Question : Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans. the trait traced in the above pedigree chart is:

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DOMINANT X-linked
RECESSIVE X-linked
dominant y-linked
recessive Y-linked

ANSWER :A
Discussion
16970.

Question : Given below is a sagital section of human brain, identify the structures labelled as A, B,C, D and E with their important functions.

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Only A is correct
A and D are correct
B, C and D are correct
A, B, D and E are correct

Answer :B
Discussion
16971.

Question : Given below is a pedigree chart of a family with five children.Its shows the inheritance of attached ear-lobes as opposed to the free ones.The squares represent the male individuals and circles the female individuals.Which one of the following consclusions drawn is correct?

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The PARENTS are homozygoes recessive
Then TRAIT is Y-linked
The parents are HOMOZYGOUS dominant
The parents are heterozygoes.

Solution :NA
Discussion
16972.

Question : Given below is a pedigree chart of a family with five children. It shows the inheritance of attached ear-lobes as opposed to the free ones. The square represent the male individuals and circles represent the female individuals Which one of the following conclusions drawn is correct ?

Answer»

The PARENTS are HOMOZYGOUS recessive
The TRAIT is Y-linked
The parents are homozygous dominant
The parents are heterozygous

Answer :D
Discussion
16973.

Question : Given below is a mixture of disease affecting human beings caused by various pathogens. Classify according to their groups. Kala-azar, Filariasis, Chikungunya, Amoebiasis, Candidiasis, Plague, Shigellosis, Break bone fever, enteric fever, Athlete's foot.

Answer»

Solution :Bacterial diseases - PLAGUE, Shigellosis, ENTERIC fever
Viral diseases- Break bone fever, Chikungunya.
Pungal diseases- Athlete.s foot, Candidiasis
Protan diveases -KALA AZAR, Amocbiasis
Helminthic diseases - Filariasis
Discussion
16974.

Question : Given below is a pedigree chart of a family with five children. It shows the inheritance of attached ear lobes as opposed to the free ones. The squares represent the male indiones. The squares represent the male individuals and circles the female individuals Which of one of the following conclusions drawn is correct?

Answer»

The PARENTS are HOMOZYGOUS recessive
The TRAIT is Y-linked
The parents are homozygous dominant
The parents are heterozygous

Answer :D
Discussion
16975.

Question : Given below is a list of autotrophs and heterotrophs. With your knowledge about food chain, establish various linkages between the organisms on the principle of 'eating and being eaten'. What is this inter-linkage established known as ? Algae, hydrilla, grasshopper, rat, squirrel, crow, maize plant, deer, rabbit, lizard, wolf, snake, peacock, phytoplankton, crustaceans, whale, tiger, lion, sparrow, duck, crane, cockroach, spider, toad, fish, leopard, elephant, goat, nymphae, spirogyra.

Answer»

SOLUTION :Food web and Food chains : Who will eat when in straight line and each is eaten in ecosystem is called food chain.
The natural inter connection of food chain containing producers, consumers and decomposers in cross (x) shape form combinedly is called food web.
(i) HIGHLEVEL carnivores - TIGER, Lion (Higher trophic level).
(ii) Spider, cockroach, lizard, wolf, SNAKE, toad, fish, crane - Secondary consumers. (Third trophic level)
(iii) Crustaceans, grasshopper, deer, mouse, squirrel (Second trophic level).
(iv) Rabbit, elephant - goat, primary consumers (Second trophic level).
(v) Phytoplankton, algae, hydrila maize PLANT, nimphia, spirogyra - Producers (first trophic level).
Discussion
16976.

Question : Given below is a graph showing change of potential difference occuring during conduction of nerve impulse through an axon, which one is correct about the shadded area-A in this graph :

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SHOWS depolarisation, DUE to opening of `Na^(oplus)` VGC
Shows repolarisation, due to opening of `K^(oplus)` VGC
Shows hyperpolarisation, due to on TIME closing of `Na^(oplus)` VGC and `K^(oplus)` VGC
Shows hyperpolarisation, due to LATE closing of `K^(oplus)` VGC

Answer :D
Discussion
16977.

Question : Given below is a graph drawn on the parameters of growth versus time A,B and C respectively represent.

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EXPONENTIAL phase, lag phase nd STEADY state phase
Steady state phase, lag phase and log phase
Slow growing phase, lag phase and steady state phase
Lag phase, steady state phase and log phase

ANSWER :B
Discussion
16978.

Question : Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces giving the name of the hormanes responsible for the events shown.

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Solution :The secretion of GONADOTROPINS (LH and FSH) increases gradually during the follicular phase and stimulates follicular development as well as secretion of estrogens. Rapid secretion of LH leading to its maximum level during the midcycle the midcycle (14th day) of menstrual cycle induces rupture of Graafian follicle to release ovum.
The remaining parts of the follicle transform into the corpus luteum. The corpus luteum SECRETES LARGE amounts of progesterone which is essential for MAINTENANCE of the endometrium during PREGNANCY.
Discussion
16979.

Question : Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces giving the name of the hormones responsible for the events shown.

Answer»

Solution :A = LH and FSH, B = LH, C = Progesteron
In follicular phase SECRETION of gonadotropin hormones, LH and FSH increases gradually, stimulates follicular development and secretion of estrogen. Rapid secretion of LH leading to its maximum level during the MID cycle (14th day) induces rapture of graafian follicle and OVUM is released. The remaining part of Graafian follicle transforms into corpus luteum. The corpus luteum secretes LARGE amount of progesterena whichis essential for maintenance of ENDOMETRIUM.
Discussion
16980.

Question : Given below is a figure of an ecosystem. Name any plant that is characteristic of such ecosystem.

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SOLUTION :Tactena, depterocarpus, JAMUN, goosebery. palash, Mahue and semul plants are of ecosystem of FORESTS of this type in INDIA.
Discussion
16981.

Question : Given below is a figure of an ecosystem. (i) What type of ecosystem is shown in the figure.

Answer»

SOLUTION :This is a ECOSYSTEM of DECIDUOUS FORESTS
Discussion
16982.

Question : Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelledA, B, C, D.

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Vas deferens (A), SEMINAL VESICLE (B), prostate (C ), bulbourethral GLAND (D)
Vas deferens (A), seminal vesicle (B), bulbourethral gland (C ), prostate (D)
Ureter (A), seminal vesicle (B), prostate (C ), bulbourethral gland (D)
Ureter (A), prostate (B), seminal vesicle (C ), bulbourethral gland (D)

Answer :A
Discussion
16983.

Question : In asexual reproduction, offsprings are produced by a single parent with or without the involvement of gamete formation. Name the asexual reproductive structures a and b given below. (a ) hydra (b ) penicillium

Answer»

Solution :
(a ) Transfer of pollen GRAINS from anther to the stigma of the same flower is called AUTOGAMY.
(B) Transfer of pollen grains from anther to the stigma of another flowr of the same PLANT is called geitonogamy.
Discussion
16984.

Question : In the figure of mammalian spermatozoan, identify the different parts marked as A, B, C, D

Answer»

A-vas DEFERENS, B-seminal VESICLE, C-prostate, D- BULBOURETHRAL GLAND.
A-vas deferens, B-seminal vesicle, C-bulbourethral gland, D-prostate.
A-ureter, B-seminal vesicle, C-prostate, D-bulbourethral gland.
A-ureter, B-prostate, C-seminal vesicle, D-bulbourethral gland.

Answer :A
Discussion
16985.

Question : Given below is a diagrammatic cross section of a single loop of human cochlea : Which one of the following options correctly represents the names of three different parts?

Answer»

D: Sensory hair CELLS, A : ENDOLYMPH,
B: Tectorial MEMBRANE
A : PERILYMPH, B : Tectroial membrane,
C: Endolymph
B: Tectorial membrane, C : Perilymph,
D: Secretory cells
C : Endolymph, D : Sensoty hair cells,
A: Serum

Answer :B
Discussion
16986.

Question : Given below is a diagram of electrostatic precipitator identify A,B, C and D and select the correct option. ?

Answer»

`{:("" A, ""B, ""C, ""D), (" NEGATIVELY charged wire", "Negatively chared DUST PARTICLES", "Discharge corona", "Collection plate"):}`
`{:("" A, ""B, ""C, ""D), (" Negatively charged wire", "Discharge corona", "Collection plate", "Negatively charged dust particles"):}`
`{:("" A, ""B, ""C, ""D), (" Negatively charged wire", "Discharge corona", "Collection plate", "Negatively charged dust particles"):}`
`{:("" A, ""B, ""C, ""D), (" Positively charged wire", "Discharge corona", "Collection plate", "Positively charged dust particles"):}`

Solution :N//A
Discussion
16987.

Question : Given below in the diagram showing the transfer of pollen grains. . Identify a and b with technical terms.

Answer»

SOLUTION :(a) AUTOGAMY & (B) GEITONOGAMY
Discussion
16988.

Question : Given below diagram is representing :-

Answer»

ROBERTSON model
Danielly – DAVSON model
Singer – NICOLSON model
Gorter – Grandel model

Answer :B
Discussion
16989.

Question : Given below are two restriction endonuclease enzymes Hind II and Sal I. Write the name of genus, species and strain of the bacteria from which these have been obtained.

Answer»

Solution :HindII :H Genus Heamophilus
in Species inffluenzae
d Strain RD
II Secondenzyme in order of indentification
SAL I : S Genus Streptomyes
al Species albus
I FIRST enzyme in order off indenfication .
Discussion
16990.

Question : Given below are the three DNA palindrome sequences . Name the respective restriction enzymes which cleaves those sequence also mention the microbial sources {:("(a) 5' AGCT3'" ,"(b) 5' GGCC3'","(c) 5'GAATTC3'"),(3'TCGA5',"3'CCGG5'","3' CTTAAG5'"):}

Answer»

SOLUTION :
Discussion
16991.

Question : Given below are the three statement each with one or two blanks. Select the option which correctly fills up the balnks in any two statements. (A) For a long time it was also believed that life came out of decaying and rotting matter like straw, mud, etc. This was the theory of i (B) During post-industrilasiation period, the tree trunks became dark due to industrial smoke and soots. Under this condition the i did not survive due to predators, while ii survived. (C) Lamrack said that evolution of life forms had occurred but driven by i of organs.

Answer»

i panspermia, i NATURAL slection
i white-WINGED MOTH, ii DARK-winged moth
i use and disuse
i spontaneous generation
i dark winged moth, ii white-winged moth
i eternity of life
i use and disuse.

Solution :N//A
Discussion
16992.

Question : Given below are the structrures of tRNA molecules which are involved in translation process. In one tRNA, codon is mentioned but not the amino acid. In another tRNA molecule, amino acid is named and not the codon. Complete the figure by mentioning the respective amino acids and codons.

Answer»

SOLUTION :
Discussion
16993.

Question :Given below are the steps of protein synthesis. Arrange them in correct sequence and select the correct option. (i)Codon- anticodon reaction between mRNA and aminoacyl tRNAcomplex. (ii) Attachment of mRNA and smaller sub-unit of ribosome. (iii) Charging or aminoacylation of tRNA . (iv) Attachment of larger sub-unit of ribosome to the mRNA-tRNA _("Met") complex. (v) Linking of adjacent amino acids. (vi) Formation of polypeptide chain.

Answer»

`(II)to(i)to(iii)to(V)to(IV)to(vi)`
`(v)to(ii)to(i)to(iii)to(iv)to(vi)`
`(iii)to(ii)to(iv)to(i)to(v)to(vi)`
`(iii)to(ii)to(i)to(iv)to(v)to(vi)`

ANSWER :d
Discussion
16994.

Question : Given below are the secondary metabolites. Mention their plant source. (a) Digoxin (b) Vincristine.

Answer»

Solution :(a) Digoxin is obtained from DIGITALIS purpuria.
(B) VINCRISTINE is obtained from Catharanthus roseus.
Discussion
16995.

Question : Given below are the plant species and their parts used. Which is the incorrect pair(s)? (i) Cajanus cajan : Seeds (ii) Anacardium occidentale : nuts (iii) Borassus flabellifer : Endospeerm (iv) Capsicum annum : leaves

Answer»

a) `iandii`
B) II and III
c) iii only
d) iv only

Answer :D
Discussion
16996.

Question : Given below are the pairs of pathogens and the diseases caused by them. Which out of these is not a matching pair and why ?(A) Virus - common cold(B) Salmonella - typhoid(C) Microsporum - filariasis(D) Plasmodium - malaria

Answer»

VIRUS common - COLD
SALMONELLA - typhold
MICROSPORUM - filariasis
PLASMODIUM - malaria

Solution : Microsporum causes ringworm disease.
Discussion
16997.

Question : Given below are the names of hormones involved in digestion. How many enzymes have inhibitory action from those given below. [Gastrin,Enterogastrone, Vasoactive intestinal peptide, Somatostatin, Duocrinin, Pancreatic polypeptide]

Answer»

Five
Four
THREE
SIX

ANSWER :C
Discussion
16998.

Question : Given below are the list of components and accessories used in PTC technique. Sort them out according to their mode of sterilizatoin. (a) Glass wares (b) Laminar air flow chamber (c ) Nutrient medium (d) Explant

Answer»

Solution :(a) Glass WARES are sterilized by auto claving
(b) NUTRIENT medium is sterilized by auto claving.
(c ) Laminar AIR flow chamber is sterilized by UV radiation.
(d) EXPLANT is surface sterilized using chemicals.
Discussion
16999.

Question : Given below are the gene sequence on the chromosome. Compare them with the normal chromosome and identify the type of structural chromosomal aberrations. Normal Chromosome : A - B - C - D - E - F - G - H - I. chromosome - 1 - A- B- C - B - C - D - E - F - G - H - I. Chromosome 2 : A - B - C - D - F - G - H - I

Answer»

SOLUTION :CHROMOSOME 1 : TANDEM duplication.
Chromosome 2 : Intercalary DELETION.
Discussion
17000.

Question : Given below are the four schematic that describe the dependence of the rate of an enzymatic reaction on temperature which of the following combinations is true for thermophilic and psychrophilic organisms ?

Answer»

P and P
P and S
P and R
R and R

Solution :Being mostly PROTEINACEOUS enzymes are liable to temperature. Themosphiles are living at very high temperature while psyrophiles live in the range of `-20^(@)C "to" + 10^(@)C` . In either case rising temperature will FIRST raise the rate of reaction but if temperature is still raised continuosly enzyme get DENATURED hence reaction rate DECREASES.
Discussion