24277 + Interview Questions in Biology in Class 12 Page 129 InterviewSolution

6401.	Question : The experimental proof for semiconservative replication of DNA was first shown in a
Answer» VIRUS Fungus Plant BACTERIUM SOLUTION :Bacterium

Discussion

6402.	Question : The experimental material used by Darwin
Answer» Digitaria Phleum Phalaris Phragmites Answer :C

Discussion

6403.	Question :The experimental plant material used by Mendel was :
Answer» Cow PEA GARDEN pea Wild pea Sweet pea Answer :B

Discussion

6404.	Question : The experiment to show the production of mice in 21 days from carried out by
Answer» JEAN BAPTISTE VON Helmont Louis Pasteur Aristotle Francisco Reddi Answer :A

Discussion

6405.	Question : The experiment on DNA using.^15N isotope prove that its replication is_____.
Answer» ANSWER :semi-conservative

Discussion

6406.	Question : The expensive metals used in catalytic converters in automobiles area)Cadmium and Rhodiumb)Platinum, Palladium, Rhodiumc)Lead and cadmiumd)Copper and cadmium
Answer» CADMIUM and RHODIUM PLATINUM, PALLADIUM, Rhodium Lead and cadmium Copper and cadmium Answer :B

Discussion

6407.	Question : The expanded form of DDT is :(A) dichloro diphenyl trichloroethane(B) dichloro diethyl trichloroethane(C) dichloro dipyrydyl trichloroethane(D) dichloro diphenyl tetrachloroacetate
Answer» dichloro diphenyl TRICHLOROETHANE dichloro diethyl trichloroethane dichloro dipyrydyl trichloroethane dichloro diphenyl tetrachloroacetate Solution :(A) dichloro diphenyl trichloroethane The expanded FORM of DDT is dichloro diphenyl trichloroethane. It was first sysnthesized in 1874. It is a colourless, TASTELESS and almost odourless cyrstaline insecticide. It opens SODIUM ion CHANNELS in the neurons causing them to fire spontaneously and leads spasms and death.

Discussion

6408.	Question : The exoskeleton in cockroach is
Answer» In the form of HARDENED chitinous plates A SINGLE LAYER which covers the WHOLE boby Absent Soft Answer :A

Discussion

6409.	Question : The existence within a population of non- beneficialalleles in heterozygous genotype is :
Answer» gentic load genetic drift genetic flow selection Answer :A

Discussion

6410.	Question : Exine is formed of substance called ……..
Answer» ANSWER :sporopollenim

Discussion

6411.	Question :The exhaust from a thermal power plant if passed through an electrostatic precipitator removes
Answer» Sulphur dioxide CARBON dioxide PARTICULATE matter UPTO 10 MICROMETERS Particulate matter which is swept away by water flowing in opposite direction Solution :The exhaust from a thermal POWER plant if passed through an electrostatic precipitator removes particulate matter up to 10 micrometers.

Discussion

6412.	Question : The excretory organs of the cockroach are tracheae.
Answer» ANSWER :Malphigian TUBULES

Discussion

6413.	Question : The excretory organ in cockroach is_____.
Answer» ANSWER :MALPIGHIAN TUBULE

Discussion

6414.	Question : The excreta of cattle are rich in bacteria_____.
Answer» ANSWER :METHANOBACTERIUM

Discussion

6415.	Question : The exchange of gasses in the alveoli of the lungs takes place during respiration. Identify the labeling a-e
Answer» a- Air flows into and out of ALVEOLI b-Deoxygenated blood c-OXYGENATED blood d-oxygen DIFFUSES into RED blood cells e-Carbon dioxide diffuses out of the plasma a- Air flows out of alveoli b- oxygenated blood c-Deoxygenated blood d-oxygen diffuses into red blood cells e-Carbon dioxide diffuses out of the plasma a- Air flows into and out of alveoli b-Deoxygenated blood c-oxygenated blood d-Carbon dioxide diffuses out of the plasma e-oxygen diffuses into red blood cells a- Air flows out of alveoli b- oxygenated blood c-Deoxygenated blood d- Carbon dioxide diffuses out of the plasma e- oxygen diffuses into red blood cells Answer :A

Discussion

6416.	Question : The plant part used for tissue culture is
Answer» ANSWER :EXPLANT

Discussion

6417.	Question : The exchange of gases in the alveoli of the lungs takes place by
Answer» PASSIVE transport active transport osmosis simple diffusion Answer :D

Discussion

6418.	Question : The excess of births over deaths in a year per 1,000 individuals is called growth rate.
Answer» ANSWER :TRUE

Discussion

6419.	Question : The excertory wastes of tadpole larva of frog and adult frog are …………. Respectively.
Answer» UREA and URIC acid ammonia and urea urea and ammonia urea and urea Answer :B

Discussion

6420.	Question : The examples of stop codons are _____.
Answer» UAA,UAG,UGA UAA,AUG,AUA UAA,UCA,UGA AUG,GUG,UAA Answer :A

Discussion

6421.	Question : The examples of DNA polymorphisms are
Answer» SNPs STRs VNTRs All the three Answer :D

Discussion

6422.	Question : The example of sexual reproduction is (A) Fragmentation (B) Production of androgenic haploid (C) Heterospory (D) None of the above
Answer» FRAGMENTATION production of ANDROGENIC haploid heterospory NONE of above ANSWER :B

Discussion

6423.	Question : The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Answer» Solution :In1850s, Le., before industrialisation it was observed that there were more white-winged peppered moths (Bistonbetularia) on TREES than dark-winged or melanised moths (Bistonca- rbonaria). However, when the COLLECTION carried out from the same AREA, but after industrialisation, Le., in 1920, there were more dark-winged moths in the same area, i.e., the proportion was reversed. Before industrialisation set in, thick growth of almost white-coloured lichen covered the trees-in that background the white winged moth survived but the dark-coloured moth were picked out by predators. LICHENS can be used as industrial pollution indicators. They will not grow in areas that are polluted. During post-industrialisation period, the tree trunks became dark due to industrial smoke and soots. Under this condition the white-winged moth did not survive due to predators, dark-winged or melanised moth survived. Hence, moths that were able to camouflage themselves, Le., hide in the background, survived. This understanding is supported by the fact that in areas where industrialisation did not occur, e.g., in rural areas, the count of melanic moths was low. This showed that in a MIXED population, those that can better-adapt, survive and increase in population size.

Discussion

6424.	Question : The evolution was termed as 'RNA World' on the basis of specific property of RNA molecule. This property was:
Answer» ENZYMATIC property DUPLICATION property Semi CONSERVATIVE duplication property Acting as a TEMPLATE for PROTEIN synthesis Answer :A

Discussion

6425.	Question : The evolution of the flowers of a plant and its pollinator species tightly linked with one another is termed
Answer» MACROEVOLUTION coevolution retrogressive evolution DIVERGENT evolution Answer :B

Discussion

6426.	Question : The evolution of man was possible because our ape like ancestors had
Answer» MIGRATORY habits BINOCULAR VISION omnivorous DIET quadripedal locomotion Answer :A

Discussion

6427.	Question : The events of telophase are reverse to that of_____
Answer» ANSWER :PROPHASE

Discussion

6428.	Question : The evidence that crossing over occurs at four strandedstage of the chromosomes, comes from
Answer» Studies of meiosis in MAIZE Studies on linkage MAPS of CHROMOSOMES in Drosophilla 4:4 arrangement of ASCOSPORES in Neurospora 2:2:2:2 ARRANGEMENTOF ascosporesin Neurospora Solution :It was made possibleby tetrad analysis.

Discussion

6429.	Question : The event that triggers the formation of ootid is
Answer» BINDING of sperm HEAD to RECEPTORS ( ZP3) on ZONA pollucida Entry of sperm into secondary oocyte Cortical reaction Entry of sperm into fallopian tube Answer :B

Discussion

6430.	Question :The event that occurs at the site where the reabsorption of urea from renal fluid takes place is
Answer» Mandatory reabsorption of NACL Secretion of `K^+` and `H^+` ions Conditional reabsorption of `K^+`and glucose OBLIGATORY reabsorption of WATER and glucose Answer :B

Discussion

6431.	Question : Theessentialelementthatactivatesenzymes rubisco and pepco, also
Answer» Needed INTHE ACTIVITY of pyruvicanddecarboxyiase Helpsin CARBOHYDRATE transiocation Essentialfor watersplittingreactions Formsconstituentsof PHYTOL tailfochlorophyll ANSWER :A

Discussion

6432.	Question : The essential element must be directly involved in the metabolism of the plant.
Answer» ANSWER :1

Discussion

6433.	Question : The equivalent of a structural gene is
Answer» MUTON CISTRON OPERON RECON SOLUTION :cistron

Discussion

6434.	Question : The equation log S = log C + Z log A represent
Answer» species richness and area genetic diversity and area allelic FREQUENCY and speciation NONE of the above Answer :A

Discussion

6435.	Question : The equation (Dleta N_B)/(Delta N_A) = B represents which of the following?
Answer» Natality Growth RATE Mortality All of these ANSWER :B

Discussion

6436.	Question : The equation dN/dt=rN(K-N/K) is represented as
Answer» LOGISTIC population growth exponential population growth K Verhulst PEARL logistic growth both a and C ANSWER :D

Discussion

6437.	Question : The equation (DeltaN_n)/(DeltaN) represents which of the following ?
Answer» natality growth rate mortality All of these Answer :B

Discussion

6438.	Question : The eqn, (Delta Nn)/(Delta Nt) = B represents which of the following?
Answer» Natality Mortality Growth rate All of these Answer :C

Discussion

6439.	Question : The epithelial tissue present on the inner surface of bronchioles and trachea -
Answer» Squamous Cuboidal Glandular Ciliated Answer :D

Discussion

6440.	Question : The epithelium which is found in the wall of blood vessels and air sacs of lung
Answer» CUBOIDAL epithelium Squamous epithelium Columnar epithelium Ciliated epithelium Answer :B

Discussion

6441.	Question : The epoch of human civilization is
Answer» Pliocene Holocene Pleistocene Palaeocene ANSWER :B

Discussion

6442.	Question : The epistatic effect, in which the dihybrid cross 9:3:3:1 between AaBb AaBb is modified as
Answer» Dominance of ONE ALLELE onanother allel of both loci Interaction between two ALLELES of DIFFERENT loci Dominance of one allele toanother allel of same loci Interaction between two alleles of someloci Answer :B

Discussion

6443.	Question : The epididymis in a leech leads to a small duct called __________ .
Answer» SOLUTION :EJACULATORY

Discussion

6444.	Question : The enzymes which are commonly used in genetic engineering are
Answer» RESTRICTION ENDONUCLEASES and polymerase Endonuclease and LIGASE Restriction endonucleases and ligase Ligase and polymerase Answer :C

Discussion

6445.	Question : The epidermal outgrowths are known as
Answer» Stomata Leaves Trichomes Flower buds Answer :TRICHOME

Discussion

6446.	Question : The enzymes that convert pyruvic acid into ethanol are
Answer» CARBOXYLASE DEHYDROGENASE DECARBOXYLASE and dehydrogenase Oxidases and decarboxylase ANSWER :C

Discussion

6447.	Question : The enzymes responsible for the transcription of SnRNAs in eukaryotes is/are :
Answer» RNA POLYMERASE I RNA polymerase I and II RNA polymerase II RNA polymerase III Answer :C

Discussion

6448.	Question : The enzymes for thet condensation of trioses during Calvin cycle is
Answer» Hexokinases Carboxydismutase ALDOLASE OXYSOME ANSWER :C

Discussion

6449.	Question : The enzymes required for synthesis of ATP are located on ........
Answer» oxysomes cristae matrix ribosomes Answer :A

Discussion

6450.	Question : The enzymes acting as both carboxylase at one time & oxygenase at another time
Answer» PEP CARBOXYLASE RUBISCO Carbonic ANHYDRASE ATP ASE Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : The experimental proof for semiconservative replication of DNA was first shown in a

Question : The experimental material used by Darwin

Question :The experimental plant material used by Mendel was :

Question : The experiment to show the production of mice in 21 days from carried out by

Question : The experiment on DNA using.^15N isotope prove that its replication is_____.

Question : The expensive metals used in catalytic converters in automobiles area)Cadmium and Rhodiumb)Platinum, Palladium, Rhodiumc)Lead and cadmiumd)Copper and cadmium

Question : The expanded form of DDT is :(A) dichloro diphenyl trichloroethane(B) dichloro diethyl trichloroethane(C) dichloro dipyrydyl trichloroethane(D) dichloro diphenyl tetrachloroacetate

Question : The exoskeleton in cockroach is

Question : The existence within a population of non- beneficialalleles in heterozygous genotype is :

Question : Exine is formed of substance called ……..

Question :The exhaust from a thermal power plant if passed through an electrostatic precipitator removes

Question : The excretory organs of the cockroach are tracheae.

Question : The excretory organ in cockroach is_____.

Question : The excreta of cattle are rich in bacteria_____.

Question : The exchange of gasses in the alveoli of the lungs takes place during respiration. Identify the labeling a-e

Question : The plant part used for tissue culture is

Question : The exchange of gases in the alveoli of the lungs takes place by

Question : The excess of births over deaths in a year per 1,000 individuals is called growth rate.

Question : The excertory wastes of tadpole larva of frog and adult frog are …………. Respectively.

Question : The examples of stop codons are _____.

Question : The examples of DNA polymorphisms are

Question : The example of sexual reproduction is (A) Fragmentation (B) Production of androgenic haploid (C) Heterospory (D) None of the above

Question : The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.

Question : The evolution was termed as 'RNA World' on the basis of specific property of RNA molecule. This property was:

Question : The evolution of the flowers of a plant and its pollinator species tightly linked with one another is termed

Question : The evolution of man was possible because our ape like ancestors had

Question : The events of telophase are reverse to that of_____

Question : The evidence that crossing over occurs at four strandedstage of the chromosomes, comes from

Question : The event that triggers the formation of ootid is

Question :The event that occurs at the site where the reabsorption of urea from renal fluid takes place is

Question : Theessentialelementthatactivatesenzymes rubisco and pepco, also

Question : The essential element must be directly involved in the metabolism of the plant.

Question : The equivalent of a structural gene is

Question : The equation log S = log C + Z log A represent

Question : The equation (Dleta N_B)/(Delta N_A) = B represents which of the following?

Question : The equation dN/dt=rN(K-N/K) is represented as

Question : The equation (DeltaN_n)/(DeltaN) represents which of the following ?

Question : The eqn, (Delta Nn)/(Delta Nt) = B represents which of the following?

Question : The epithelial tissue present on the inner surface of bronchioles and trachea -

Question : The epithelium which is found in the wall of blood vessels and air sacs of lung

Question : The epoch of human civilization is

Question : The epistatic effect, in which the dihybrid cross 9:3:3:1 between AaBb AaBb is modified as

Question : The epididymis in a leech leads to a small duct called __________ .

Question : The enzymes which are commonly used in genetic engineering are

Question : The epidermal outgrowths are known as

Question : The enzymes that convert pyruvic acid into ethanol are

Question : The enzymes responsible for the transcription of SnRNAs in eukaryotes is/are :

Question : The enzymes for thet condensation of trioses during Calvin cycle is

Question : The enzymes required for synthesis of ATP are located on ........

Question : The enzymes acting as both carboxylase at one time & oxygenase at another time