24277 + Interview Questions in Biology in Class 12 Page 166 InterviewSolution

8251.	Question :Single cell protein is produced by..............
Answer» FERMENTATION Polyploidy Hybridization All the above Solution :Fermentation

Discussion

8252.	Question : Since October 02, 2014 "Swachh Bharat Abhiyan" has been launched in our country. (a) Write your views on this initiative giving justification. (b) As a biologist name two problems that you may face while impementing the programme in your locality . ( c)Suggest two remedial methods to overcome these problems.
Answer» Solution :SWACHH Bharat Abhiyan'is an initiative started by India's prime Minister, Mr. Narendra Modi on October 02, 2014 ,It is our primary duty to keep our nation clean because wastes are the biggest EVIL that hinder the progress and the development of a country. An unclean Surrounding will lead to a lot of problems, starting from the health of citizen,s to the shortage of LAND. On a large scale, it is responsible for the pollution, be it air and water , which creates problems both on development and economic fronts of the country. (b ) Two problems faced are : 1. Problem of Proper sanitation 2. Separation of bio- DEGRADABLE and NON- biodegradable and non-biodegradable and non-biodegradable wastes so that they can be used recyled accordingly .

Discussion

8253.	Question : Since in the pleistocence ice age,deserts have gradually formed in south-western united states. As the lakes and rivers of these areas shrunk into isolated springs, the fishes developed strong potential for
Answer» introgression speciation autopolyploidy allopolyploidy Answer :B

Discussion

8254.	Question : Since which year, human population has entered exponential phase?
Answer» SOLUTION :1750 A.D.

Discussion

8255.	Question : since DNA is a hydrophilic molecule,it cannot pass throught cel membrances.Name and explain the technique with the DNA is forced into (i) a bacterial cell (ii) a plant cell (iii) an animal cell.
Answer» Solution :CHEMICAL treatment:treated with divalent cation such as Calcium) and EXPOSURE to cold and high temp. (`42^2` C)alternatively (Bacterial CELL) (ii) BIOLISTICS or gene gun (Plant cell ).In this method GOLD and tungsten particles,coasted with DNA are bombarded with high velocity (iii) Micro-injection,(animal cell).In this method r DNA is directly injected into the nucleus of an animal cell

Discussion

8256.	Question : Simply define the PCR technique. Also mention its inventor.
Answer» SOLUTION :The POLYMERASE Chain Reaction (PCR) is an invitro amplification technique used for synthesising multiple identical copies (billions) of DNA of interest. The technique was developed by Kary Mullis in the YEAR 1983.

Discussion

8257.	Question :Since how many years, milk and milk production has been developed as an industry?
Answer» 200 150 100 125 Solution :100

Discussion

8258.	Question : Simultaneous movement of two molecules across a membrane in the same direction is known as:
Answer» ANTIPORT Symport Uniport None of these Answer :B

Discussion

8259.	Question : Simplest type of stele is
Answer» with PITH, siphonostele without pith, protostele without pith, siphonostele with Pith, protostele Answer :B

Discussion

8260.	Question : Simplest form of selction in cross-pollinated is :
Answer» PURE -LINE selection Pedigree selection Random selection Mass selection Answer :D

Discussion

8261.	Question : Simple epithelium is made up of
Answer» Non-cellular LAYER of HYALURONIC acid Actively dividing cells Loosely arranged cells Compactly PACKED SINGLE layer of cells Answer :D

Discussion

8262.	Question : Simple permanent tissue that performs various functions like - photosynthesis, storage, secretion etc., is -
Answer» Parenchyma Collenchyma Sclerenchyma xylem Answer :A

Discussion

8263.	Question : Simple diffusion mainly based on:
Answer» ANSWER :(a) Pressure/concentration GRADIENT (b) solubility of gases (C) THICKNESS of membrane involved in diffusion

Discussion

8264.	Question : Simple binary fission is seen in
Answer» PARAMOECIUM PLANARIA amoeba EUGLENA Answer :C

Discussion

8265.	Question : Simple as well as facilitated diffusion both (correct one) –
Answer» Do not REQUIRE ATP energy Show UPHILL transport Require special membrane proteins Can not transfer the substances having a HYDROPHOBIC moiety Answer :A

Discussion

8266.	Question : Simple cells converted into cancer cells by the process of …………….
Answer» PHYSICAL factors Chemical factors Biological factors All the above Solution :All the above

Discussion

8267.	Question : Similarity between adult Amphioxus and adult Petromyzon is
Answer» Presence of 6-15 PAIRS of gill slits Presence of PAIRED fins Presence of notochord Presence of vertebrae Answer :C

Discussion

8268.	Question : Silver revolution is rapid increase in fish production.
Answer» ANSWER :EGG PRODUCTION

Discussion

8269.	Question : Silver fish belongs to :
Answer» Mollusca Arthropoda Chordata Pisces Answer :B

Discussion

8270.	Question : Silkworms belong to Order.
Answer» SOLUTION :Lepidoptera,

Discussion

8271.	Question : Silkworm is differed from prawn and scorpion in having of :-
Answer» JOINTED appendages Biramous appendages Three PAIR of legs Open circulation Answer :C

Discussion

8272.	Question : Silk mainly consists of :-
Answer» Keratin Fibroin Collagen Elastin Answer :B

Discussion

8273.	Question : Silk is the secretion of
Answer» CEPHALIC glands gastric glands buccal glands salivary glands Answer :D

Discussion

8274.	Question : Siliencing of a gene could be achieved through the use of
Answer» SHORT INTERFERING RNA (RNAi) Antisense RNA By both NONE of the above Answer :C

Discussion

8275.	Question : Silent Valley is a National Reserve Forest in Kerala. Why is it called so?
Answer» SOLUTION :Because of the ABSENCE of CICADA

Discussion

8276.	Question : Silent Valley having rare plants and animals and also meant for conservation of forest is located in
Answer» Kerala Rajasthan Jammu and Kashmir Andhra Pradesh Answer :A

Discussion

8277.	Question : Silencing of mRNA has been used in producing transgenic plants resistant to(A) Bollworms(B) Nematodes(C) White rusts(D) Bacterial blights
Answer» BOLLWORMS NEMATODES WHITE rusts bacterial blights Solution :nematodes

Discussion

8278.	Question : Silencing of a gene could be achieved through the use of(A) RNAi only(B) Antisense RNA only(C) By both (A) and (b)(D) None of these
Answer» (RNAI) only ANTISENSE RNA only By both None of the above Solution :Silencing of a GENE could be achieved using (RNAI) and Antisense RNA only.

Discussion

8279.	Question : Silencing of a gene could be achieved through the use of
Answer» RNAI only ANTISENSE RNA only both RNAi and antisense RNA none of the above Answer :C

Discussion

8280.	Question : Silencing of mRNA has been used in producing F transgenic plants resistant to :
Answer» Bollworms NEMATODES WHITE rusts BACTERIAL blights SOLUTION :Nematodes

Discussion

8281.	Question : Silencing of a gene could be achieved through the use of:
Answer» SHORT interfering RNA (RNAI) ANTISENSE RNA by Both None of the above Answer :C

Discussion

8282.	Question : Significance of 'heat shock' method in bacterial transformation is to facilitate
Answer» Binding of DNA to the cell wall Uptake of DNA through membrane transport proteins Uptake of DNA through transient pores in the bacterial cell wall Expression of antibiotic resistance gene Solution :Uptake of DNA through transient pores in the bacterial cell wall Significance of .heat shock. method in bacterial transformation is to FACILITATE uptake of DNA through transient pores in the bacterial cell wall. In heat shock method the bacterial CELLS are placed with the recombinant DNA on ice followed by PUTTING them at 42 °C and again on ice. This cycle is repeated resulting in formation of transient pores in bacterial cell wall through which the recombinant DNA ENTERS the cell. The pores then get closed.

Discussion

8283.	Question : Signal recognition particle or SRP consists of
Answer» Two scRNA + two proteins 1 sc RNA + 6 proteins 1 sc RNA + 3 proteins 1 sc RNA + 2 proteins. Solution :N//A

Discussion

8284.	Question : Signal theory is related to
Answer» NERVOUS system Emergency Formation of SPECIAL MEMBRANE lipids Synthsis of SECRETORY proteins. Solution :N//A

Discussion

8285.	Question : Name three viral diseases
Answer»

Discussion

8286.	Question : The signals for parturition originate from
Answer» OXYTOCIN RELEASED from material PITUITARY PLACENTA only Fully developed foetus only Both placenta as well as fully developed foetus Answer :D

Discussion

8287.	Question : Side -effects of use ofanabolicsteroids in female include (i) Masculinisation (ii) Premature baldness (iii) Breast enlargement (iv) Deepening of voice (v) Abnormal menstrual cycle (iv) Depression
Answer» I, ii , IV , v andvi I, ii, v andvi I, iv , v and vi I, iii, iv , v and v Solution :side-effects of use of anabolicsteroids in females (i) masculinisation (MALE like features ) (ii) Increased aggressiveness (iii)MOODSWINGS (v) ABNORMAL menstrual cycle (vi) Enlargementof clitoris (vii) Deepeningof VOICE (viii) Excessivehairgrowth on face and body

Discussion

8288.	Question : Siddha medicine is an age old practice in our nation. According to this medicinal system, what is the major cause for all sort of illness in humans?
Answer» Solution :ACCORDING to SIDDHA medicine, three humors namely vatam, pittam and kapam are responsible for the health of human being and any disturbance in the equilibrium of these humors RESULT in ILL health.

Discussion

8289.	Question : Side by side experiments are conducted, to identify DNA as genetic material, unequivocally by
Answer» GRIFFITH O.T. Avery, MAC LEOD and Mc CARTY D. Hershy and M.Chase Wattson and Crick Answer :C

Discussion

8290.	Question : Sickle cell anemia results from a single base substitution in a gene, thus it is an example of
Answer» POINT mutations frame SHIFT mutation silent mutations both a and b Answer :a

Discussion

8291.	Question : Sickle cell anaemia is related to …………….. .
Answer» Pleiotropy Dominant epistasis Incomplete dominance codominance

Discussion

8292.	Question : Sickle cell anaemia is
Answer» an AUTOSOMAL linked DOMINANT trait caused by substitution of valine by glutamic acid in the `beta`-globin chain of HAEMOGLOBIN caused by a change in BASE pair of DNA characterized by ELONGATED sickle like RBCs with a nucleus Answer :A

Discussion

8293.	Question : Sickle cell anaemia is an example of
Answer» Epistasis Codominance Pleiotropy Incomplete dominance Answer :C

Discussion

8294.	Question : Sickle-cell anaemia is an example of :
Answer» Epistasis Co-dominance Pleiotropy Incomplete dorminance Answer :C

Discussion

8295.	Question : Sickle-cell anaemia is
Answer» AUTOSOMAL DOMINANT inheritance X-linked RECESSIVE inheritance autosomal recessive inheritance X-linked dominant inheritance Answer :C

Discussion

8296.	Question :Sickle-cell anaemia as well as thalassemia are autosomal recessive diseases.Why are these diseases more common than expected in certain areas?
Answer» Solution : PERSONS heterozygous for sickle-cell trait and THALASSEMIA are more numerous in some African groups living in areas infested with malaria, because MALARIAL parasite is unable to survive in sickle-shaped RBCs or has chances of survival in thalassemic persons. So these HETEROZYGOTES are resistant to malaria and are favoured by natural SELECTION.

Discussion

8297.	Question :Sickle-cell anaemia as well as thalassemia are autosomal recessive diseases.What do the terms autosomal and recessive mean?
Answer» Solution : (i) Gene LOCATED on the autosomes are called autosomal genes. (II) An allele that produces its phenotype only when in homozygous but does not EXPRESS when in HETEROZYGOUS is called recessive.

Discussion

8298.	Question : Sickel-cell anemia is
Answer» Caused by substitution of valine by glutamic acid in the BETA globin chain of haemoglobin Caused by a change in a single base PAIR of DNA Characterized by elongated sickle like RBCS with a nucleus An autosomal linked dominant trait Answer :B

Discussion

8299.	Question : Siamese twins are always either male or female and never be male and female. a. Why are the twins called Siamese twins? b. What do you mean by identical twins? c. What are fraternal twins?
Answer» Solution :a. It was first reported in Siame. Hence the name. b. The twins formed from a single ZYGOTE are CALLED identical twins. Identical twins are always male or female. c. The twins formed from different zygote are called FRATERNAL twins. The fraternal twins are either male or female or male and female.

Discussion

8300.	Question :showed that in the presence of sunlight only the green parts of the plants could release oxygen
Answer» JULIUS VON Sachs Joseph Priestley Jan Ingenhousz Van NIEL ANSWER :C

Discussion

Explore topic-wise InterviewSolutions in .

Question :Single cell protein is produced by..............

Question : Since in the pleistocence ice age,deserts have gradually formed in south-western united states. As the lakes and rivers of these areas shrunk into isolated springs, the fishes developed strong potential for

Question : Since which year, human population has entered exponential phase?

Question : since DNA is a hydrophilic molecule,it cannot pass throught cel membrances.Name and explain the technique with the DNA is forced into (i) a bacterial cell (ii) a plant cell (iii) an animal cell.

Question : Simply define the PCR technique. Also mention its inventor.

Question :Since how many years, milk and milk production has been developed as an industry?

Question : Simultaneous movement of two molecules across a membrane in the same direction is known as:

Question : Simplest type of stele is

Question : Simplest form of selction in cross-pollinated is :

Question : Simple epithelium is made up of

Question : Simple permanent tissue that performs various functions like - photosynthesis, storage, secretion etc., is -

Question : Simple diffusion mainly based on:

Question : Simple binary fission is seen in

Question : Simple as well as facilitated diffusion both (correct one) –

Question : Simple cells converted into cancer cells by the process of …………….

Question : Similarity between adult Amphioxus and adult Petromyzon is

Question : Silver revolution is rapid increase in fish production.

Question : Silver fish belongs to :

Question : Silkworms belong to Order.

Question : Silkworm is differed from prawn and scorpion in having of :-

Question : Silk mainly consists of :-

Question : Silk is the secretion of

Question : Siliencing of a gene could be achieved through the use of

Question : Silent Valley is a National Reserve Forest in Kerala. Why is it called so?

Question : Silent Valley having rare plants and animals and also meant for conservation of forest is located in

Question : Silencing of mRNA has been used in producing transgenic plants resistant to(A) Bollworms(B) Nematodes(C) White rusts(D) Bacterial blights

Question : Silencing of a gene could be achieved through the use of(A) RNAi only(B) Antisense RNA only(C) By both (A) and (b)(D) None of these

Question : Silencing of a gene could be achieved through the use of

Question : Silencing of mRNA has been used in producing F transgenic plants resistant to :

Question : Silencing of a gene could be achieved through the use of:

Question : Significance of 'heat shock' method in bacterial transformation is to facilitate

Question : Signal recognition particle or SRP consists of

Question : Signal theory is related to

Question : Name three viral diseases

Question : The signals for parturition originate from

Question : Side -effects of use ofanabolicsteroids in female include (i) Masculinisation (ii) Premature baldness (iii) Breast enlargement (iv) Deepening of voice (v) Abnormal menstrual cycle (iv) Depression

Question : Siddha medicine is an age old practice in our nation. According to this medicinal system, what is the major cause for all sort of illness in humans?

Question : Side by side experiments are conducted, to identify DNA as genetic material, unequivocally by

Question : Sickle cell anemia results from a single base substitution in a gene, thus it is an example of

Question : Sickle cell anaemia is related to …………….. .

Question : Sickle cell anaemia is

Question : Sickle cell anaemia is an example of

Question : Sickle-cell anaemia is an example of :

Question : Sickle-cell anaemia is

Question :Sickle-cell anaemia as well as thalassemia are autosomal recessive diseases.Why are these diseases more common than expected in certain areas?

Question :Sickle-cell anaemia as well as thalassemia are autosomal recessive diseases.What do the terms autosomal and recessive mean?

Question : Sickel-cell anemia is

Question : Siamese twins are always either male or female and never be male and female. a. Why are the twins called Siamese twins? b. What do you mean by identical twins? c. What are fraternal twins?

Question :showed that in the presence of sunlight only the green parts of the plants could release oxygen