24277 + Interview Questions in Biology in Class 12 Page 163 InterviewSolution

8101.	Question : Some important plant decease are given. Find out the causative organism. a.Brown rust of wheat b.Tobacco mosaic c.Black rot of crucifers d.Red rot of sugar cane e.Turnip mosaic f.Late blight of potato
Answer» Solution :Fungi: Brown rust of wheat, Red ROT of sugar CANE, LATE blight of potato Bacteria: Black rot of cruciſers Viras: Turnip MOSAIC, Tobacco mosaic

Discussion

8102.	Question : Some improved cross-breed strains of poultry birds are
Answer» HH - 260 IBL - 80 B-77 all of these Answer :D

Discussion

8103.	Question : Some hormones need the secondary messenger because
Answer» they need activator They can't CROSS cell membrane They can cross cell membrane They need a PROSTHETIC group Answer :B

Discussion

8104.	Question : Some important applications of biotechnology are given below. Arrange them in correct order.
Answer» SOLUTION :

Discussion

8105.	Question : Some gaps are left blanks in the following equations. Fill the blanks. {:("Wild Einkorn",X,"'a'= Wild and cultivated Emmer"),("Wild and Cultivated Emmer",X,"'b'= Cultivated bread wheat"):}
Answer» SOLUTION :a' = WILD GOAT GRASS'B' = Aegilops squarrosa

Discussion

8106.	Question : Some flowers possess pleasant odour and attractive colours for :
Answer» HYDROPHILY ANEMOPHILY Entomophily All of the above Answer :C

Discussion

8107.	Question : Some flowers open during the day time and close at night this is called:
Answer» Phototaxy Photoropism Photoperiodism Photonasty Answer :D

Discussion

8108.	Question : Some events of mitotic cell division are given below in unordered manner - (i) Condensation of chromosomes is completed (ii) Chromosome lose their identity as discrete elements (iii) Sister chromatids separate (iv) Initiation of the assembly of mitotic spindle The correct order for steps of cell division is:-
Answer» i `RARR` iv `rarr` III `rarr` ii iv `rarr` i `rarr` iii `rarr` ii ii `rarr` i `rarr` iv `rarr` iii iv `rarr` iii `rarr` i `rarr` ii Answer :B

Discussion

8109.	Question : Some flowers are highly modified to insect pollination . They have many features which help this kind of pollination . (a) What are these flowers called as ? (b) Explain the characters which make them suitable for this type of pollination .
Answer» Solution :(a) Entamophilous flowers (B) Brigjhtly COLOURED FRAGRANT NECTARY sticky pollen GRAINS .

Discussion

8110.	Question : How many of the following are examples of homologus structures in plant : (a) Eyes of octapus and mammal (b) Potato and sweet potato (c) Forelimbs of whale, bat cheetah and human (d) Vertebrate heart (e) Thorn of bougainvillea and tendril of cucurbita (f) Potato and corrot (g) Potato and radish
Answer» SOLUTION :(a) HOMOLOGOUS organs (B) ANALOGOUS organs (c) Homologous organs (d) Homologous organs (E) Analogous organs (f) Analogous organs

Discussion

8111.	Question : Some events related to human reproduction are given below. Formation of placenta, First meiotic division, Cortical reaction, Ovulation, Fertilizin -antifertilizin reaction, Gastrulation. a. Arrange the events in sequential order. b. State why you arrange so.
Answer» Solution :a. First meiotic division `to` OVULATION Fertilizin-antifertilizin REACTION `to` Cortical reaction `to` GASTRULATION `to` Formation of placenta b.After the first meiotic division the ovulation occurs. After the fertilization, the fertilizin and antifertilizin occur. After the fusing of male and female nucleus, the cortical reaction takes place. Then gastrulation occurs and THREE germ LAYERS are formed and the form tion of placenta occurs..

Discussion

8112.	Question : Some dogs bark, while trailing, others are silent. The barker gene is dominant, the silent gene is recessive. The gene gor normal tail is dominant over the gene for screw (curly) tail. A barker dog with a normal tail which is heterozygous for both characteristics is mated with another dog of th same genotype. What fraction of their offspring will be barkers with the screw tails?
Answer» 3/4 9/16 3/16 1/4 Answer :C

Discussion

8113.	Question : Some ethical standards are required to evaluate the morality of all human activities. Explain Biopiracy?
Answer» Solution :The use of bioresources by multinational companies and other organizations WITHOUT proper authorization from the COUNTRIES and the people concerned without compensation PAYMENT.

Discussion

8114.	Question : Some drugs when taken for a long time cause addiction. a. What is withdrawal symptom? b. How can you prevent the addiction?
Answer» Solution :a. The drug or alcohol addicted PERSONS FIND it difficult to discontinue the use of the drug since it produces adverse physiological effects. This causes restlessness and anxiety, nausea, vomiting, abdominal cramps, anorexia, twitches etc. This is known as withdrawal SYMPTOM. b. Drug or alcoholic addiction can be prevented by treating them in DE addiction centres and giving the PROPER guidance.

Discussion

8115.	Question : Some diseases are transmitted through contaminated articles. The method is called
Answer» VEHICLE transmission Vector transmission Air-borne METHOD Fomite-borne method SOLUTION :Formite-borne method

Discussion

8116.	Question : Some discoveries are made unexpectedly. a. What is it known as ? b. Give one example.
Answer» SOLUTION :a. Serendipity b. Discovery of penicillin by Alexander Fleming. He was working on staphylococci BACTERIA. He once observed that in a contaminated CULTURE PLATE this bacteria did not grow. He came to a conclusion that it was due to a chemical produced by the blue-green MOULD. Hence named penicillin because it was found from blue green mould penicillium natatum.

Discussion

8117.	Question : Some complex inorganic and organic compounds in the hot sea aggregated in different combination forming
Answer» COACERVATES Postcell Pre-cell Protoplasm Answer :A

Discussion

8118.	Question : Some common symptoms, nature of pathogen and method of dissemination of certain plant diseases are tabled below. Arrange them in most appropriate manner.
Answer» SOLUTION :

Discussion

8119.	Question : Some characters/structures are given below. How many of them are found in both bryophyta and pteridopyta? (A) Archegonium (B) Protonema (C) Embryo (D) Ovule (E) Vascular tissue (F)Antheridium
Answer» Two Three Four Five Answer :B

Discussion

8120.	Question : Some characters of pre historic hominid species are given below: (i) Brain capacity 900 cc (ii) Lived near east and central Asia (iii) First human being like (iv) Used hides to protect their bodies (v) Buried their dead (vi) Existed around 10000 years back Which characters are shared by Neanderthal man among these?
Answer» (i), (II), (iv), (vi) (ii), (iv), (v) (i), (ii), (iv), (v) (i), (ii), (III), (iv), (v) ANSWER :B

Discussion

8121.	Question : Some cells divide only occasionally as and when required. These are said to be remained in a quiescent stage called.
Answer» ANSWER :`G_0` PHASE

Discussion

8122.	Question : Some blue-green alge are useed as bioferilisers
Answer» ANSWER :D

Discussion

8123.	Question : Some are the examples given below. How many of them have vexillary aestivation ? Gram, Arhar, Soyabean, Lupin, Petunia, Tobacco, Mulaithi, Asparagus
Answer» Three Four Five six ANSWER :C

Discussion

8124.	Question : Some animals have constant high body temperature . This is because
Answer» they can work FAST at this temperature they prefer to live in cold region they are active animals they like this temperature. SOLUTION :Body temperature is a function of RATE of METABOLISM thus active animals have HIGH body temperature .

Discussion

8125.	Question : Some animals are shown below. Identify the national park concerned chiefly with their preservation and select the correct option. A. Velavadar National Park, Gujarat B. Jim Corbett National Park, Uttarakhand C. Gir Forest, Gujarat D. Kaziranga National Park, Assam
Answer» A-(2), B-(3), C-(1), D-(4) A-(4), B-(3), C-(1), D-(2) A-(4), B-(2), C-(3), D-(1) A-(3), B-(1), C-(2), D-(4) Solution :Asiatic lion (represented by 1) is found in Gir forest of Gujarat. One horned rhinoceros (represented by 2) is protected in Kaziranga National Park, ASSAM. Jim Corbett Nation Park (Uttrakhand) is FAMOUS for PROJECT tiger initiative. Black bucks (represented by 4) are protected in Velavadar National Park in Gujarat.

Discussion

8126.	Question : Some allergens sneezing and wheezing in human beings. What causes this type of response by the body?
Answer» Solution : This is the exaggerated response of the immune system to CERTAIN antigens (ALLERGENS) PRESENT in the environment. This is brought about by `I_g E` antibodies.

Discussion

8127.	Question : Some amino acids are coded by more than one codon, hence the genetic code is
Answer» overlapping degenerate wobbled unambiguous Answer :B

Discussion

8128.	Question : Some amino acids are coded by more than one codon hence the code is :
Answer» unambiguous degenerate universal initiator Answer :D

Discussion

8129.	Question : Somatic hybridization is achieved through………………
Answer» PROTOPLAST fusion r-DNA technology Transformation Grafting ANSWER :A

Discussion

8130.	Question : Somatic variations found in plants regenerated in vitro _________.
Answer» ANSWER :Somaclonal VARIATIONS

Discussion

8131.	Question : Somatic hybrids are produced by
Answer» Protoplast fusion Tissue culture Pollen culture Hybridoma process Solution :Protoplast TECHNOLOGY REFERS to protoplast fusion or SOMATIC hybridization.The TWO protoplast are FUSED by PEG (Polyethylene glycol) and thus somatic hybrid are obtained.

Discussion

8132.	Question : Somatic neural system which is a part of PNS relays impulses from the CNS to
Answer» INVOLUNTARY organs smooth MUSCLES SKELETAL muscles viscera Answer :C

Discussion

8133.	Question : Somatic hybridization is a technique of
Answer» NATURAL breeding Natural pollination Artificial pollination Somatic cells hybridization Solution :Somatic hybridization is a technique of somatic cells hybridization which INVOLVE the FUSION of protoplasts.Cell formed by the fusion of protoplast of the same genotype are called homokaryotes and fused cells which CONTAIN non-identical nuclei are called heterokaryotes.

Discussion

8134.	Question : Somatic hybridization is a technique of:
Answer» NATURAL breeding. Natural pollination Artificial pollination Somatic CELLS hybridisation Answer :D

Discussion

8135.	Question : Somatic crossing over was first reported in fungus, Aspergillus noduians by
Answer» C STERN Morgan G Pontecarvo BRIDGES ANSWER :C

Discussion

8136.	Question : Somatic hybridisation
Answer» Solution :Isolated PROTOPLASTS from two DIFFERENT varieties of plants - each having a desirable character can be fused to get HYBRID protoplasts, which can be further grown to form a new PLANT. These hybrids are called somatic hybrids while the PROCESS is called somatic hybridisation.

Discussion

8137.	Question : Somatic chromosomes are autosomes while sex chromosomes are called _____
Answer» Allosomes Polysomes X-Chromosomes Nullisomes Answer :A

Discussion

8138.	Question : Somaclones shows
Answer» SIMILARITY with PARENTS disisimilarity with parents similarity AMONG OFFSPRINGS but not with parents none of the above ANSWER :A

Discussion

8139.	Question : Somatic cells and Germ cells
Answer» Solution :SOMATIC cells : It forms somatic organs and double by meiosis it has diploid chromosomes. Germ cells : It is RESPONSIBLE for transport of heredity characters and are produced by MITOSIS and meiosis respectively. It has haploid .N. chromosomes.

Discussion

8140.	Question : Somaclones are obtained by
Answer» TISSUE culture PLANT breeding IRRADIATION GENETIC engineering Answer :A

Discussion

8141.	Question : Somaclones
Answer» Solution :It is possible to achieve propagation of a large number of plants in very SHORT DURATIONS through tissue culture. Each of these plants will be GENETICALLY IDENTICAL to the original PLANT from which they were grown they are somaclones.

Discussion

8142.	Question : Somaclonal variation appears in plants:
Answer» Growing in polluted soil or WATER EXPOSED to gamma rays Raised in TISSUE culture Transformed by RECOMBINANT DNA technology Answer :C

Discussion

8143.	Question : Somaclonal variation can be obtained by:
Answer» HYBRIDISATION TISSUE culture Application of colchicine Irradiation with GAMMA rays Answer :B

Discussion

8144.	Question : Somaclonal variation appears in
Answer» ORGANISMS PRODUCED through SOMATIC hybridization PLANTS growing in polluted area. Apomictic plants Tissue culture RAISED plants. Solution :Tissue culture raised plants.

Discussion

8145.	Question : Somachlonal variations are obtained through
Answer» chemical mutagens gamma RAYS TISSUE CULTURE amphimixis Answer :C

Discussion

8146.	Question : Soma of sensory neuron is located in
Answer» GREY MATTER of SPINAL cord Receptor organ Dorsal ROOT ganglion Ventral root ganglion Answer :C

Discussion

8147.	Question : Soluton A has Psi_(s) =-30 bars and Psi_(p) = 5 bars. Solution B has Psi_(s) = -10 bars and Psi_(p) = 0 atm. The two are separated by semipermeable membrane . Flow of water will be
Answer» B to A A to B Equalin both DIRECTIONS No FLOW of WATER . ANSWER :A

Discussion

8148.	Question :Solution of which chamber has a lower water potential ?
Answer» ANSWER :CHAMBER B

Discussion

8149.	Question : Solute potential of a solution is always:
Answer» =0 >0 <0 between 0-1 Answer :C

Discussion

8150.	Question : Solute potential of a solution is
Answer» Always negative REPRESENTED by `psi_s` Always positive Both (1) and (2) Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : Some important plant decease are given. Find out the causative organism. a.Brown rust of wheat b.Tobacco mosaic c.Black rot of crucifers d.Red rot of sugar cane e.Turnip mosaic f.Late blight of potato

Question : Some improved cross-breed strains of poultry birds are

Question : Some hormones need the secondary messenger because

Question : Some important applications of biotechnology are given below. Arrange them in correct order.

Question : Some gaps are left blanks in the following equations. Fill the blanks. {:("Wild Einkorn",X,"'a'= Wild and cultivated Emmer"),("Wild and Cultivated Emmer",X,"'b'= Cultivated bread wheat"):}

Question : Some flowers possess pleasant odour and attractive colours for :

Question : Some flowers open during the day time and close at night this is called:

Question : Some flowers are highly modified to insect pollination . They have many features which help this kind of pollination . (a) What are these flowers called as ? (b) Explain the characters which make them suitable for this type of pollination .

Question : Some events related to human reproduction are given below. Formation of placenta, First meiotic division, Cortical reaction, Ovulation, Fertilizin -antifertilizin reaction, Gastrulation. a. Arrange the events in sequential order. b. State why you arrange so.

Question : Some ethical standards are required to evaluate the morality of all human activities. Explain Biopiracy?

Question : Some drugs when taken for a long time cause addiction. a. What is withdrawal symptom? b. How can you prevent the addiction?

Question : Some diseases are transmitted through contaminated articles. The method is called

Question : Some discoveries are made unexpectedly. a. What is it known as ? b. Give one example.

Question : Some complex inorganic and organic compounds in the hot sea aggregated in different combination forming

Question : Some common symptoms, nature of pathogen and method of dissemination of certain plant diseases are tabled below. Arrange them in most appropriate manner.

Question : Some characters/structures are given below. How many of them are found in both bryophyta and pteridopyta? (A) Archegonium (B) Protonema (C) Embryo (D) Ovule (E) Vascular tissue (F)Antheridium

Question : Some cells divide only occasionally as and when required. These are said to be remained in a quiescent stage called.

Question : Some blue-green alge are useed as bioferilisers

Question : Some are the examples given below. How many of them have vexillary aestivation ? Gram, Arhar, Soyabean, Lupin, Petunia, Tobacco, Mulaithi, Asparagus

Question : Some animals have constant high body temperature . This is because

Question : Some animals are shown below. Identify the national park concerned chiefly with their preservation and select the correct option. A. Velavadar National Park, Gujarat B. Jim Corbett National Park, Uttarakhand C. Gir Forest, Gujarat D. Kaziranga National Park, Assam

Question : Some allergens sneezing and wheezing in human beings. What causes this type of response by the body?

Question : Some amino acids are coded by more than one codon, hence the genetic code is

Question : Some amino acids are coded by more than one codon hence the code is :

Question : Somatic hybridization is achieved through………………

Question : Somatic variations found in plants regenerated in vitro _________.

Question : Somatic hybrids are produced by

Question : Somatic neural system which is a part of PNS relays impulses from the CNS to

Question : Somatic hybridization is a technique of

Question : Somatic hybridization is a technique of:

Question : Somatic crossing over was first reported in fungus, Aspergillus noduians by

Question : Somatic hybridisation

Question : Somatic chromosomes are autosomes while sex chromosomes are called _____

Question : Somaclones shows

Question : Somatic cells and Germ cells

Question : Somaclones are obtained by

Question : Somaclones

Question : Somaclonal variation appears in plants:

Question : Somaclonal variation can be obtained by:

Question : Somaclonal variation appears in

Question : Somachlonal variations are obtained through

Question : Soma of sensory neuron is located in

Question : Soluton A has Psi_(s) =-30 bars and Psi_(p) = 5 bars. Solution B has Psi_(s) = -10 bars and Psi_(p) = 0 atm. The two are separated by semipermeable membrane . Flow of water will be

Question :Solution of which chamber has a lower water potential ?

Question : Solute potential of a solution is always:

Question : Solute potential of a solution is