24277 + Interview Questions in Biology in Class 12 Page 206 InterviewSolution

10251.	Question : Ploidy level of polar nucleus and definitive nucleus is respectively
Answer» N & 3N N & N N & 2N 2N & 2N Answer :C

Discussion

10252.	Question : Ploidy level of endosperm varies markedly in embro sac of:
Answer» Monosporic TYPE Bisporic type Tetrasporic type Allium type Solution :In tetrasporic type DEVELOPMENT of embryo sac, DIFFERENT TYPESOF endosperms are produced with varying ploidy levels (from 3n to 15N)

Discussion

10253.	Question : Plenty of aerenchyma are found in :
Answer» Hybrophytes Mesophytes Xerophytes Halophytes Answer :A

Discussion

10254.	Question : Pleiotropic gene
Answer» controls only one phenotype controls SEVERAL phenotypes mark the EXPRESSION of ANOTHER non-allelic gene INHIBITS cross over Solution :controls several phenotypes

Discussion

10255.	Question : Pleiotrophy occurs when a gene has
Answer» A COMPLEMENTARY gene elsewhere A small effect on one trait Reversible EFFECTS on the phenotype, DEPENDING on AGE MANY effects on the phenotype Answer :D

Discussion

10256.	Question : Platyhelminthes , annelids , arthropods and molluscans are
Answer» PROTOSTOMES PROTOZOANS CHORDATES VERTEBRATES ANSWER :A

Discussion

10257.	Question : Plates of lorice in dinoflagellates in composed of
Answer» CELLULOSE and liginin Hemi-cellulose and pectin Cellulose and pectin Chitin and pectin Answer :C

Discussion

10258.	Question : Platelets contain enzyme prothrombin.
Answer» ANSWER :Thrombo KINASE

Discussion

10259.	Question : Platelet plug is associated with
Answer» CLOT retraction Hemostasis Fibrin formation Homoeostasis. Answer :B

Discussion

10260.	Question : Plastocyanin' (PC) contains :
Answer» Mo Mn Fe Cu Answer :D

Discussion

10261.	Question : Plastic filmwaste that is usedto mademodifiedrecycleplastic byajmal khanin collaborationwith RV collegeEngineeringa) Name the productformedafter the recyclingof film waste b)Name the waterrepellentsubstancesis mixedwith modifieda plastic ' to lay downRoad inBangalorecity corporation
Answer» SOLUTION :a) POLYBLEND B) BITUMEN

Discussion

10262.	Question : Plasmolysed cell become completely deplasmolysed when kept in
Answer» DILUTE SALT solvent Concentrated salt water Pure water None of the above Answer :C

Discussion

10263.	Question :Plasmodium vivax is a digenetic parasite. Justify your answer.
Answer» SOLUTION :Plasmodium REQUIRES two hosts (MAN and MOSQUITO) for the completion of its life cycle.

Discussion

10264.	Question : Plasmogamy occurs by means of ___(a) and ___(b) in Ascobolus and Peziza, respectively.
Answer» (a) SPERMATIZATION - (B) AUTOGAMY (a) Spermatization - (b) Somatogamy (a) Gametangial contact - (b) CONJUGATION (a) Somatogamy - (b) Spermatization Answer :B

Discussion

10265.	Question : Plasmodium passes from how many stages in human beings?
Answer» ONE Two THREE Four Solution :Three

Discussion

10266.	Question : Plasmodesmata were discovered and named by
Answer» Hanstein Kolliker Strasburger Garnier Answer :C

Discussion

10267.	Question : Which plasmodium causes sleeping sickness.
Answer» ANSWER :MALARIA

Discussion

10268.	Question : Plasmodesmata is:
Answer» Locomotory structure Membrane connecting the NUCLEUS with plasmalemma Connections between ADJACENT cells Lignified CEMENTED layers between cells Answer :C

Discussion

10269.	Question : Plasmids that genes to provide resistance to antibiotics are called
Answer» R PLASMIDS C plasmids A plasmids TI plasmids ANSWER :a

Discussion

10270.	Question : Plasmids that can intergate into the bacterial DNA are called :
Answer» Plasmogenes Neurogences Episomes Hydrogenes Answer :D

Discussion

10271.	Question : plasmids are used in genetics engineering because they are
Answer» EASILY available ABLE to REPLICATE Able to integrate with host CHROMOSOME Inert Solution :Able to replicate

Discussion

10272.	Question : Plasmids are used as vectors in genetic engineering because of their
Answer» RESISTANCE to antibiotics Resistance to RESTRICTION enzymes Ability to CARRY foreign genes Ability to CAUSE infection in host Answer :C

Discussion

10273.	Question : Plasmids are suitable vectors for gene cloning because
Answer» These are small CIRCULAR DNA molecules, which can integrate with host chromosomal DNA These are small circular DNA molecules with their own replication origin site. These can shuttle between PROKARYOTIC and EUKARYOTIC cells These OFTEN carry antibiotic resistance genes. Answer :B

Discussion

10274.	Question : Plasmids are suitable vectors for gene cloning because :
Answer» These are small circular DNA molecules which can integrate with host chromosomal DNA These are small circular DNA molecules with their own REPLICATION ORIGIN site These can SHUTTLE between prokaryotlc and eukaryotic cells These often carry antibiotic resistance gene Solution :These can shuttle between prokaryotic and eukaryotic cells

Discussion

10275.	Question : Plasmids are found in
Answer» BACTERIA YEAST VIRUSES (1) and (2) Answer :D

Discussion

10276.	Question : Plasmids are extrachromosomal circular DNA molecules:
Answer» which have their own point of replication and can REPLICATE independently which have their own point of replication but cannot replicate dependently which do not have their own point of replication and cannot replicate INDEPENDENT of bacterial chromosomal DNA None of the above Answer :A

Discussion

10277.	Question : Plasmid.OR"transferable genetic element
Answer» <P> Solution :(1)Plasmids are small,extrachromosomal,double stranded circular forms of DNA that replicate autonomously.(2)Plasmids are seen in bacterial cell,yest and animal cell the ter, plasmid was introduced by Joshua Lederberg in 1952.(3)Plasmids are considered as replicons as they are capable of autonomous replication in suitable HOST.(4)They from TRANSFERABLE genetic material.Size of the plasmid is VARIABLE form 1 to over 1,000 kilo base pairs(kbp).(5)Plasmids are not required for the survival of the organism in which they are located.(6)Nut during unfavourable conditions the plasmids help the bacteria to survive.These bacterial plasmids carry gene which are related to metabolic activity which help them to reproduce and survive.When plasmids cannot accommodate long DNA molecule,They form cosmids.(7)Plasmids are designated by a lower case of P (p) which is later followed by the first letter of the researcher orr researcher's name and the numerical number given by the researcher.E.g. pBR 322 means plasmid discovered by Bolivar and Rodriguez whi give it a number 322.Some plasmids also carry the name of the place where they are discovered.

Discussion

10278.	Question : Plasmid is used as carrier because:
Answer» It has both ends with REPLICATING points It has no FREE ends It is CIRCULAR DNA with a capacity of binding with eukaryotic DNA All of the above Answer :C

Discussion

10279.	Question : plasmid DNA act as
Answer» vectors Gene Gun cloning sites clones Answer :A

Discussion

10280.	Question : Plasma thromboplastin component is known as
Answer» STUART FACTOR Hageman factor Christmas factor Labile factor Answer :C

Discussion

10281.	Question : Plasma proteins which protect our body from pathogens are
Answer» Albumins Globulins Fibrinogen Heparin Answer :C

Discussion

10282.	Question : Plasma membrane controls
Answer» PASSAGE of `H_(2)O` only Passage of WATER and some selected solutes preferably in IONIC FORM into and out of the cell Passage of water and all solutes into the cell Passage of all cell contents out of the cell Answer :B

Discussion

10283.	Question : Plasma differs from arum in
Answer» PRESENCE of CLOTTING factors Absence of clotting factors Presence of minerals Presence of glucose Answer :A

Discussion

10284.	Question : Plasma cells secrete_____.
Answer» ANSWER :Y-globulin

Discussion

10285.	Question : Planula is a larva of phylum :
Answer» Arthropoda Cnidaria Porifera Echinodermata Answer :B

Discussion

10286.	Question : Plants with ovaries having only one or a few ovules , are generally pollinated by
Answer» BEES BUTTERFLIES BIRDS Wind Answer :D

Discussion

10287.	Question : Plants which produce fruits only once in their life period are called as ?
Answer» ANSWER :MONOCARPIC

Discussion

10288.	Question : Plants with Kranz anatomy are related to all of the following, except
Answer» They SHOW` CO_2` fertilization effect They have high TEMPARETURE optimum for photosynthesis They are BETTER ADAPTED to semi-arid habitats They lack photorespiration process Answer :C

Discussion

10289.	Question : Plants which produce seeds only once in their lifespan.
Answer» ANSWER :MONOCARPIC

Discussion

10290.	Question : Plants which grow in strong light intensity are called as :
Answer» ANSWER :HELIOPHYTES

Discussion

10291.	Question : Plants which can grow in saline environment are called :
Answer» PSAMMOPHYTES Hydrophytes Xerophytes Answer :A

Discussion

10292.	Question : Plants which grow in lower light intensity.
Answer» ANSWER :SCIOPHYTES

Discussion

10293.	Question : Plants that retain their evergreen foliage throughout evergreen foliage throughout the year are called :
Answer» Draught escaping plants Evergreen plants Xerophytic plants All of above Solution :Plants BEARING evergreen foliage THROUGHT the year are called evergreen plants. POPULARLY ,needle -leaved tree (pine ,jupiter ETC.) are called evergreen plants.

Discussion

10294.	Question : plantsthatinhabit a rain- forest arenotfound in awetland ,Explain .
Answer» Solution :PLANTSIN rainforestareadaptedtohigh densityofrainfall and sunlight as againstthose FOND in wetlanndswhichare whichare SUITED towaterlogged andsalineconditions .

Discussion

10295.	Question : Plants such as Prosopis, Acacia and Capparis represent examples of tropical
Answer» Grassland Thorny deserts DECIDUOUS FOREST Evergreen forests SOLUTION :Flora of throm forests include Prosopis cineraria, ACACIA senagal, Capparis decidua,Salvadora oleoidses. Asparagus racempsus, Ephedra fallata.

Discussion

10296.	Question : Plants that grow in sandy soil are known as :
Answer» Heliophytes Psammophytes Sciophytes Mesophytes Answer :B

Discussion

10297.	Question : Plants seeds got from other countries are tested in plant quarantine. Reason out.
Answer» Solution :Plants MATERIALS brought into a country must be free from pathogens.It may LEAD to OUTBREAK of free from pathogens .It may lead to outbreak of new disease or introduction of a new PATHOGEN new disease or introduction of a new pathogen into the environment .Thus plant materials (seeds/slaping)are TESTED in plant quarantine.

Discussion

10298.	Question :Plants raised through tissue cultures are clones of the parent. plant. Discuss the utility of these plants.
Answer» Solution :PLANT raised through tissue cultures are CLONES of the PARENT plant which MEANS they are genetically identical to the original plant. They are utilised for maintaining a DESIRABLE trait of parent.

Discussion

10299.	Question : Plants raised through tissue culture technique are (i) Genetically uniform (ii) Used as inoculum (iii) Genetically similar (iv) Called clones:
Answer» (i),(ii) and (iii) are CORRECT (i) and (iv) are correct (ii) and (iii) are correct (iii) and (iv) are correct Answer :B

Discussion

10300.	Question : Plants propagated vegetaively from a single original stock are called _____.
Answer» Propagule Hybrid Heterosis Clone Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : Ploidy level of polar nucleus and definitive nucleus is respectively

Question : Ploidy level of endosperm varies markedly in embro sac of:

Question : Plenty of aerenchyma are found in :

Question : Pleiotropic gene

Question : Pleiotrophy occurs when a gene has

Question : Platyhelminthes , annelids , arthropods and molluscans are

Question : Plates of lorice in dinoflagellates in composed of

Question : Platelets contain enzyme prothrombin.

Question : Platelet plug is associated with

Question : Plastocyanin' (PC) contains :

Question : Plastic filmwaste that is usedto mademodifiedrecycleplastic byajmal khanin collaborationwith RV collegeEngineeringa) Name the productformedafter the recyclingof film waste b)Name the waterrepellentsubstancesis mixedwith modifieda plastic ' to lay downRoad inBangalorecity corporation

Question : Plasmolysed cell become completely deplasmolysed when kept in

Question :Plasmodium vivax is a digenetic parasite. Justify your answer.

Question : Plasmogamy occurs by means of ___(a) and ___(b) in Ascobolus and Peziza, respectively.

Question : Plasmodium passes from how many stages in human beings?

Question : Plasmodesmata were discovered and named by

Question : Which plasmodium causes sleeping sickness.

Question : Plasmodesmata is:

Question : Plasmids that genes to provide resistance to antibiotics are called

Question : Plasmids that can intergate into the bacterial DNA are called :

Question : plasmids are used in genetics engineering because they are

Question : Plasmids are used as vectors in genetic engineering because of their

Question : Plasmids are suitable vectors for gene cloning because

Question : Plasmids are suitable vectors for gene cloning because :

Question : Plasmids are found in

Question : Plasmids are extrachromosomal circular DNA molecules:

Question : Plasmid.OR"transferable genetic element

Question : Plasmid is used as carrier because:

Question : plasmid DNA act as

Question : Plasma thromboplastin component is known as

Question : Plasma proteins which protect our body from pathogens are

Question : Plasma membrane controls

Question : Plasma differs from arum in

Question : Plasma cells secrete_____.

Question : Planula is a larva of phylum :

Question : Plants with ovaries having only one or a few ovules , are generally pollinated by

Question : Plants which produce fruits only once in their life period are called as ?

Question : Plants with Kranz anatomy are related to all of the following, except

Question : Plants which produce seeds only once in their lifespan.

Question : Plants which grow in strong light intensity are called as :

Question : Plants which can grow in saline environment are called :

Question : Plants which grow in lower light intensity.

Question : Plants that retain their evergreen foliage throughout evergreen foliage throughout the year are called :

Question : plantsthatinhabit a rain- forest arenotfound in awetland ,Explain .

Question : Plants such as Prosopis, Acacia and Capparis represent examples of tropical

Question : Plants that grow in sandy soil are known as :

Question : Plants seeds got from other countries are tested in plant quarantine. Reason out.

Question :Plants raised through tissue cultures are clones of the parent. plant. Discuss the utility of these plants.

Question : Plants raised through tissue culture technique are (i) Genetically uniform (ii) Used as inoculum (iii) Genetically similar (iv) Called clones:

Question : Plants propagated vegetaively from a single original stock are called _____.

Question : Plasmogamy occurs by means of _(a) and _(b) in Ascobolus and Peziza, respectively.