24277 + Interview Questions in Biology in Class 12 Page 449 InterviewSolution

22401.	Question : Albinism is due to nonsynthesis of melain on account of absence of
Answer» melanase Luciferase Tyrosinase Lysine Answer :C

Discussion

22402.	Question : Albinism in corn is due to
Answer» PATHOGEN LETHAL gene deficiency of LIGHT deficiency of MINERALS Answer :B

Discussion

22403.	Question : Albinism is
Answer» ENVIRONMENT RELATED DISORDER GENETIC disorder Deficiency disease Infectious disease. Solution :N//A

Discussion

22404.	Question : Albinism is due to
Answer» GENETIC disorder malfunctioning of pituitary lack of MELANIN both (A) and (C) SOLUTION : both (A) and (C)

Discussion

22405.	Question : Albido is a measurment of the percentage of light that is :-
Answer» ABSORBED by an OBJECT surface Converted into SUGAR by photosynthesis Reflected by surface Reflected by atmosphere Answer :C

Discussion

22406.	Question : A:Lampbrush chromosomes show transcriptionally active loops R: Lampbrush chromosomes can be used in future for embryo development
Answer» if both Assertion & REASON are TRUE and the reason in the correct explanation of the assertion, then MARK(1). if both Assertion & Reason are true and the reason in the correct explanation of the assertion, then mark(2). if Assertion is the ture statement but Reason is false, then mark(3) if both Assertion and Reaosn are false STATEMENTS, then mark(4) Answer :B

Discussion

22407.	Question : Al the components of community are :
Answer» Abiotic Biotic Animal Plant Answer :B

Discussion

22408.	Question : Air pollution is maximum due to
Answer» SEWAGE and pesticides Sewage and effluents Detergents and pesticides Automobile EXHAUSTS and CHEMICALS from industries Answer :D

Discussion

22409.	Question : Air pollutionis maximally caused by
Answer» HOUSEHOLD detergents and pesticides Automobile EXHAUSTS and CHEMICALS from industry Sewage and pesticides Sewage and industrial effluents Answer :B

Discussion

22410.	Question : Air quality Index number 200 denotes
Answer» GOOD, no POLLUTION Moderate, low LEVEL pollution Bad, unhealthy polluition Answer :HAZARDOUS, pollution

Discussion

22411.	Question : Air pollutioncausesserioushealth problems in men ,in industries ECPis fittedin placeof exhaust coming from smokestack to control pollution a)which is the device used to controlsulphur Dioxide pollution b) Name the agency of Governmentof indiamonitorair pollution .
Answer» Solution :a) scrubber B) CPCB ( cenral POLLUTION control BOARD )

Discussion

22412.	Question : A pollution can result in Emphysema, which is
Answer» Chronic damage to AIR sacs or alveoli LEADING to abnormal reduction in respiratory surface area Persistant inflammation and damage to the CELLS lining the bronchi and bronchioles An allergic reaction CAUSING muscle spasms in the bronchial walls Damage to any Lung tissue causing increase in ELASTICITY of the air sacs Answer :A

Discussion

22413.	Question : Air pollution as defined by WHO.
Answer» Solution :WHO defines air POLLUTION as follows."substances PRESENT in the air by the ACTIVITY of mankind in concentration sufficient to cause harmful effects to his health.Vegetation.Peoperty or to interfere with the enjoyment of his property".

Discussion

22414.	Question : Air pollutant photochemical oxidants include
Answer» Nitrous OXIDE,NITRIC ACID and Nitric oxide Oxygen,CHLORINE and Nitric acid Ozone,PAN and aldehydes Carbon monoxide and Sulphur dioxide Answer :C

Discussion

22415.	Question : Air layering is also called_____.
Answer» ANSWER :gootee

Discussion

22416.	Question : Aims of plant breeding are to produce
Answer» Disease-free varieties High-yielding varieties Early MATURING varieties All the above Solution :All the above

Discussion

22417.	Question : AIDS was first reported in :
Answer» RUSSIA France USA Germany Answer :C

Discussion

22418.	Question :AIDS was first reported in -
Answer» 1960 1986 1981 1908 Answer :B

Discussion

22419.	Question : AIDS virus is called retrovirus. Why?
Answer» SOLUTION :AIDS virus is capable of CARRYING out reverse transcription by making a DNA copy from its genetic MATERIAL RNA with the help of ENZYME reverse transcriptase.

Discussion

22420.	Question : AIDS virus has .................
Answer» SINGLE STRANDED RNA Double stranded RNA Single STRANDD DNA Double Stranded DNA Solution :Single stranded RNA

Discussion

22421.	Question : Full forms of ARC
Answer» SECOND STAGE of AIDS Not CONNECTED with AIDS Fetal effect None of above Solution : Second stage of AIDS

Discussion

22422.	Question : AIDS Virus contains
Answer» RNA with PROTEIN DNA with protein DNA WITHOUT protein DNA only Solution :RNA with protein

Discussion

22423.	Question : AIDS is due to
Answer» REDUCTION in NUMBER of HELPER T-cells reduction in number of KILLER CELL T-cells. autoimmunity non-production of interferon Solution :reduction in number of helper T-cells

Discussion

22424.	Question : AIDS is characterized by sharp reduction in number of……..
Answer» HELPER T cells Killer T cells Superior T cells B-Cells Answer :C

Discussion

22425.	Question : AIDS is caused by HIV. Among the following, which one is not a mode of transmission of HIV?
Answer» Transfusion of contaminated blood Sharing the INFECTED needles Shaking HANDS with infected persons Sexual contact with infected persons Solution :Mode of TRANSMISSION of HIV : (i) Transfusion of contaminated blood (ii) Sharing the infected needles (III) Sexual contact with infected persons

Discussion

22426.	Question : AIDS is caused by HIV.Which type of virus is HIV?
Answer» Adenovirus Retrovirus Bacteriophage Rhinovirus Answer :B

Discussion

22427.	Question : AIDS is caused by HIV. Among the following, which one in not a mode of transmission of HIV ?
Answer» Transfusion of contaminated blood. Sharing the infected needles. Shaking HANDS with infected persons. Sexual CONTACT with infected persons. Solution :AIDS is a result of an infection by the HUMAN immuno deficiency virus (HIV). Virus of AIDS is transmitted via blood and SEMEN by - transfusion of infected blood or blood products - use of contaminated needles and syringes to inject DRUGS or vaccines - use of contaminated razors - use of contaminated needles for boring pinnae - sexual intercourse with an infected partner without a condom - from infected mother to child through placenta - artifical insemination - organ transplant.

Discussion

22428.	Question : AIDS is caused by HIV that principally infects :
Answer» All LYMPHOCYTES ACTIVATOR B-cells T lymphocytes Cytoxic T cells Answer :C

Discussion

22429.	Question : AIDS is caused by
Answer» VARICELLA VIRUS RUBEOLA virus Human IMMUNODEFICIENCY virus Corynebacterium diphtheriae Answer :C

Discussion

22430.	Question : AIDS is caharacterised by sharp reduction in number of :
Answer» HELPER T-cells Killer T-cells Suppressor T -cells B-lymphocytes Answer :A

Discussion

22431.	Question : AIDS is a disorder in which the immune mechanism of the body of a patient gets suppressed. a. What pathogen is responsible for it? b. Who discovered the pathogen for the first time? c. Mention the major symptoms of that disorder.
Answer» Solution :a. HIV (Human Immunodeficiency Virus) b. Prof. Luc Montagnier in 1983 C. FEVER, weight loss, DIARRHOEA, enlargement of lymph glands. All these are DUE to LOW immune response.

Discussion

22432.	Question : AIDS
Answer» SOLUTION :ACQUIRED IMMUNO DEFICIENCY SYNDROME

Discussion

22433.	Question : “AIDS and cancer are caused by ignorance". Anil said to his classmates. Do you agree with the statement?
Answer» SOLUTION :I can.t fully agree with the statement. This is because the AIDS is caused by ignorance and CANCER is caused due to mutation and the ACTION of carcinogens.

Discussion

22434.	Question : Ahmed khan in Bangaloreprovedhimselfa goodcitizenin usinghis talentsin solvinga social issue .comment on his contribution.
Answer» Solution :Ahmed KHAN in Bangalorewho is a plastic sac manufacturer EFFECTIVELY use polyblend -a fine poweder produced from recycled plastic &mixed with bitumen &WHICHIN turn helpto roadlife bythree times .It alsoreducedpollutioncaused by plastics .Itis an examplefor theeffec tiveway for recyclingnon BIODEGRADABLE -plastic

Discussion

22435.	Question : Agroup of lymphocytes that killes certain type of cels called _____.
Answer» ANSWER :T-cells

Discussion

22436.	Question : Agrobacterium tumifaciens used in Genetic engineering
Answer» DNA mapping DNA-modification GENE transfer DNA FINGERPRINTING Solution :Gene transfer

Discussion

22437.	Question : Agroforestry benefits. Assertion (A) : Nutrient cycling between species improves and organic matter is maintained. Reason (B) : Trees provide micro climate for crops and maintain O_(2) - CO_(2) balance.
Answer» Assertion and Reason is TRUE and Reason is CORRECT EXPLANATION of Assertion. Assertion and Reason is true but Reason is not correct explanation of Assertion. Assertion is true Reason is false. Both Assertion and Reason are false. Answer :A::C::D

Discussion

22438.	Question : Agrobacterium tumifaciens act as a natural genetic engineer , who trans-forms normal plant cells into tumors. Justify the statement .
Answer» SOLUTION :AGROBACTERIUM tumifaciens is a pathogen of several dicot PLANTS. They are able to deliver a piece of DNA known as T-DNA to transform normal plant cells into a tumor , T-DNA is seen in `T_(1)`- PLASMID of Agrobacterium tumifaciens . As they transforma normal cell into a tumor with the help of an inserted DNA, they can be called as natural genetic engineers.

Discussion

22439.	Question : Agrochemical based agriculture includes
Answer» fertilisers and PESTICIDES genetically modified crops RNA interference all of these Solution :Agrochemical based agriculture is used to increase the FOOD production. It includes USE of AGROCHEMICALS such as fertilisers and pesticides.

Discussion

22440.	Question : Agrobacterium - a natural genetic engineer of plants justify the statements.
Answer» Solution :Among the various used for plant transformation , the PLASMID from Agrobacteriumhumefaciens has been used extensively. This bacterium has a large size plasmid , known as The plasmid ( Tumor inducing ) and a portion of it referred as T - DNA ( transfer DNA ) is transferred to plant genome in the infected cells and CAUSE plant tumors ( crown gall). Since this bacterium has the NATURAL ABILITY to transfer T - DNA region of its plasmid into plant genome. Upon INFECTION of cells at the wound site , it is also known as the natural genetic engineer of plants .

Discussion

22441.	Question : Agriculture production increased several times after introduction of DDT.
Answer» Solution :DDT was first insecticide used on a WIDE scale. It KILLS the caterpillars feeding on the CROP. It ensures bountiful harvests.

Discussion

22442.	Question : Agricultural water pollution and Shipping water pollution.
Answer» SOLUTION :

Discussion

22443.	Question : Agriculture is included in ............
Answer» ANIMAL HUSBANDRY Agriculture Plant BREEDING DAIRY farming Solution :Animal husbandry

Discussion

22444.	Question : Agricultural lands frequently require nutrient augmentation because :
Answer» CULTIVATION of agricultural land inhibits the DECOMPOSITION of ORGANIC matter Land that is available for agriculture tends to be nutrient poor The nutrient that become the biomass of plants are not cycled back to the soil on lands where they are harvested Nitrogen fixing bacteria are not as plentiful in agricultural soils because of the use of pesticides Answer :C

Discussion

22445.	Question : Agranal chloroplast occur is
Answer» SUCCULENTS `C_4` PLANTS HYDROPHYTES `C_3` plants ANSWER :B

Discussion

22446.	Question : AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA ?
Answer» UCCAUAGCGUA AGGUAUCGCAU ACCUAUGCGAU UGGTUTCGCAT SOLUTION :AGGUAUCGCAU

Discussion

22447.	Question : Agitation of liquid tissue culture serves the purpose of
Answer» AERATION CONSTANT MIXING BREAKING CELL aggregates All the above. Answer :D

Discussion

22448.	Question : Aggregated lymphatic follicle: in ileum are
Answer» Peyer's patches Crypts of Lieberkun Argentaffin CELLS Paneth cells ANSWER :A

Discussion

22449.	Question : Agglutination of erythrocytes of donor will occur if
Answer» O is GIVEN to AB O is given to A O is given to B B is given O Answer :D

Discussion

22450.	Question : Agents which cause allergy are :-
Answer» Immunogens Allergens Antigens Both (1) & (3) ANSWER :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Albinism is due to nonsynthesis of melain on account of absence of

Question : Albinism in corn is due to

Question : Albinism is

Question : Albinism is due to

Question : Albido is a measurment of the percentage of light that is :-

Question : A:Lampbrush chromosomes show transcriptionally active loops R: Lampbrush chromosomes can be used in future for embryo development

Question : Al the components of community are :

Question : Air pollution is maximum due to

Question : Air pollutionis maximally caused by

Question : Air quality Index number 200 denotes

Question : Air pollutioncausesserioushealth problems in men ,in industries ECPis fittedin placeof exhaust coming from smokestack to control pollution a)which is the device used to controlsulphur Dioxide pollution b) Name the agency of Governmentof indiamonitorair pollution .

Question : A pollution can result in Emphysema, which is

Question : Air pollution as defined by WHO.

Question : Air pollutant photochemical oxidants include

Question : Air layering is also called_____.

Question : Aims of plant breeding are to produce

Question : AIDS was first reported in :

Question :AIDS was first reported in -

Question : AIDS virus is called retrovirus. Why?

Question : AIDS virus has .................

Question : Full forms of ARC

Question : AIDS Virus contains

Question : AIDS is due to

Question : AIDS is characterized by sharp reduction in number of……..

Question : AIDS is caused by HIV. Among the following, which one is not a mode of transmission of HIV?

Question : AIDS is caused by HIV.Which type of virus is HIV?

Question : AIDS is caused by HIV. Among the following, which one in not a mode of transmission of HIV ?

Question : AIDS is caused by HIV that principally infects :

Question : AIDS is caused by

Question : AIDS is caharacterised by sharp reduction in number of :

Question : AIDS is a disorder in which the immune mechanism of the body of a patient gets suppressed. a. What pathogen is responsible for it? b. Who discovered the pathogen for the first time? c. Mention the major symptoms of that disorder.

Question : AIDS

Question : “AIDS and cancer are caused by ignorance". Anil said to his classmates. Do you agree with the statement?

Question : Ahmed khan in Bangaloreprovedhimselfa goodcitizenin usinghis talentsin solvinga social issue .comment on his contribution.

Question : Agroup of lymphocytes that killes certain type of cels called _____.

Question : Agrobacterium tumifaciens used in Genetic engineering

Question : Agroforestry benefits. Assertion (A) : Nutrient cycling between species improves and organic matter is maintained. Reason (B) : Trees provide micro climate for crops and maintain O_(2) - CO_(2) balance.

Question : Agrobacterium tumifaciens act as a natural genetic engineer , who trans-forms normal plant cells into tumors. Justify the statement .

Question : Agrochemical based agriculture includes

Question : Agrobacterium - a natural genetic engineer of plants justify the statements.

Question : Agriculture production increased several times after introduction of DDT.

Question : Agricultural water pollution and Shipping water pollution.

Question : Agriculture is included in ............

Question : Agricultural lands frequently require nutrient augmentation because :

Question : Agranal chloroplast occur is

Question : AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA ?

Question : Agitation of liquid tissue culture serves the purpose of

Question : Aggregated lymphatic follicle: in ileum are

Question : Agglutination of erythrocytes of donor will occur if

Question : Agents which cause allergy are :-