24277 + Interview Questions in Biology in Class 12 Page 134 InterviewSolution

6651.	Question : The development of bioreactors is required to produced large quantities of products. (a) Give optimum growth conditions used in bioreactors.
Answer» Solution :(i) TEMPERATURE, PH,substrates,salts,vitamins and OXYGEN.

Discussion

6652.	Question : The detritus food chain begins with:
Answer» PRIMARY producers primary consumers secondary consumers dead ORGANIC matter Answer :D

Discussion

6653.	Question : The development in application of mapping, sequencing and computational procedures for the analysis of entire genome of organisms comes under
Answer» MOLECULAR biology Eugenics Genomics Euphenics ANSWER :C

Discussion

6654.	Question : The developing spermatoza are nourished by............
Answer» (a) LEYDIG CELLS (B) Sertoli cells. (C) FOLLICULAR cells (d) Epididymis Solution :Sertoli cells.

Discussion

6655.	Question : The detritus food chain and grazing food chain differ. How?
Answer» Solution :DETRITUS FOOD chain begins from the DEAD and DECAYING matter while grazing food chain starts from the GREEN plants (Producers).

Discussion

6656.	Question : The details of tricarboxylic acid path was worked out by:
Answer» Meischer Hans Krebs Pasteur None of these Answer :B

Discussion

6657.	Question : The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following (a) Bacteria……… (b) Banyan ...... (c) Deer ………. (d) Fish ……...
Answer» Solution :• (a) Number / Vol or Number/WEIGHT, (b) Coverage / AREA, (C) Number / area, (d) Weight / area

Discussion

6658.	Question : The dental formula for milk teeth in human is (2102)/(2102) The above formula represents :-
Answer» Each half of the UPPER jaw and the lower jaw has 2 INCISORS, 1 CANINE, and 2 premolars. Molars are ABSENT in milk teeth Each half of the upper jaw and the lower jaw has 2 CANINES, 1 premolar, and 2 molars. incisors are absent in milk teeth Each half of the upper jaw and the lower jaw has 2 incisors, 1 canine, and 2 molars. Premolars are absent in milk teeth Each half of the upper jaw and the lower jaw has 2 incisors, 1 premolar, and 2 molars. Canines are absent in milk teeth Answer :C

Discussion

6659.	Question : The density of a population in a given habitat increases or decreases due to different reasons. Name two factors responsible for increase in population in a given area.
Answer» Solution :(I) Natality : INCREASE in population size as offsprings are ADDED to the population by NATURAL birth. (ii) Immigration: Population size INCREASES as individuals of the same species comes into a habitat from elsewhere during a given period.

Discussion

6660.	Question : The density of a population in a given habitat increasesor decrease due to different reasons.Name two factors responsible for increase in population ina given area.
Answer» SOLUTION :NATALITY and IMMIGRATION.

Discussion

6661.	Question : The density of a population in a given habitat during a period, fluctuates due to changes in certain basic processes. On this basis, identify A and B boxes in the given flow chart
Answer» A - NATALITY, B - Mortality A - IMMIGRATION, B - Emigration A - Natality, B- Immigration Both (a) and (b) ANSWER :D

Discussion

6662.	Question : The densityof a populationin a givenhabitatduringa givenperiodto increasein populationand two of themcontributeto a decrease inpopulation 1. Namethe fourbasicprocess. 2. Whichof thesecausea declineand whichcause anincrease in population?
Answer» SOLUTION :1. NatalityMortality IMMIGRATION andEmigration. b. Natalityand immigration cause an INCREASEIN populationMortalityand emigratin causedecreasein POPULATION

Discussion

6663.	Question : The density of a population in a given habit during a given period, fluctuates due to changes in certain basic processes. On this basis, fill up boxes A and B in the given flow chart with correct option.
Answer» `A-` NATALITY, `B-` Mortality `A-` Immigration, `B-`Emigration `A-`Natality, `B-`Immigration Both (a) and (b) Solution :Natality and Immigration add to the POPULATION DENSITY Mortality and emigration DECREASE the population density.

Discussion

6664.	Question : The degenerative and irreversible process in plants.
Answer» ANSWER :SENESCENCE

Discussion

6665.	Question : The deficiency symptom(s) of nitrogen in plants is/are I. dormancy fo lateral buds II. Delaying of flowring III. Inhibits protein synthesis IV. Inhibition of chloroplast formation
Answer» I and III II and III I,II and III Only IV Answer :C

Discussion

6666.	Question : The deflection of pitch angle between two successive steps (rungs) of DNA is
Answer» `72^(@)` `54^(@)` `36^(@)` `18^(@)` ANSWER :C

Discussion

6667.	Question : The deficiency of vitamin E causes which disease in poultry?
Answer» The deficiency of vitamin E causes which DISEASE in POULTRY ? ANSWER :B

Discussion

6668.	Question : The deficiency of_____causes the death of the stem and root apices.
Answer» ANSWER :CALCIUM

Discussion

6669.	Question : The deficiency of the vitamin known to cause abrotion in early pregnacty of Rat
Answer» Retinol CALCIFEROL TOCOPHEROL NAPHTHAQUINONE ANSWER :C

Discussion

6670.	Question : The deficiency of potassium produces_____growth in plants.
Answer» ANSWER :ROSETTE

Discussion

6671.	Question : The deficiencies of micronutrients, not only affects growth of plants but also vital function such as photosynthesis and mitrochondria electron flow. Among the list given below, which group of three elements shall affect most, both photosynthesis and mitrochondrial electron transport ?
Answer» CO, NI, Mo Ca, K, Na Mn, Co, Ca Cu, Mn, Fe Answer :D

Discussion

6672.	Question : The deficiencies of micronutrients not only affect growth of plants but also vital functions, Which group of three elemeµts shall affect most, both photosynthetic and mitochondrial electron transport ?
Answer» Co, Ni, Mo Ca, K, Na MN, Co, Ca Cu, Mn, Fe Answer :D

Discussion

6673.	Question : The deficiency of magnesium results in_____ of the plants.
Answer» ANSWER :Intervenal

Discussion

6674.	Question : The deficiency of copper in Citrus results in disease known as ________.
Answer» ANSWER :EXANTHEMA

Discussion

6675.	Question : The decrease in the number of leucocytes is termed as_____.
Answer» . ANSWER :LEUCOPENIA

Discussion

6676.	Question : The decomposition of organic matter is brought about by
Answer» PROTOZOANS PLANTS Micro-organisms NONE of these SOLUTION :Micro-organisms

Discussion

6677.	Question : The ________ deals with the control of several inherited human diseases especially inborn errors metabolism.
Answer» Euthenics Eugenics Euthenics All of these Answer :A

Discussion

6678.	Question : The dead component of pholem
Answer» SIEVE TUBE elements Companion CELLS PHOLEM PARENCHYMA pholen fibres Answer :D

Discussion

6679.	Question : The data collected from a water body locatednearan industryis displayed in the figure . Analyse the data. a. Explain theobserveddifferences in thelevelsof mercurybetweenprimary and secondaryconsumers. b.Mention the health problem associated with theconsumptionof fishcapturedfromd this water body.
Answer» Solution :a. Primary consumers OBTAIN theirfoodi directlyfrom the producers and they gt 46 ppm mercury level in their BODY . Thesecondary consume the primary consumers as THEIRFOOD,they get high level of merury ,i.e.,169 ppmlevel intheir body. A re-markabledifference of mercurylevel , i.e.,123 ppm is observedin thesecondary consumer.s body . B. Supposethat man is thetertiaryconsumer here . Whenhe eatsthe secondaryor primaryconsumers ,he will be AFFECTED by minamata disease ( Mercury poisoning).

Discussion

6680.	Question : The dairy industry covers.........
Answer» PRODUCTION for milk & milk PRODUCTS Processing of milk and milk products Distribution of milk and milk products All the above Solution :All the above

Discussion

6681.	Question : The cytoplasm of adjacent plant cells is connected to each otherby:
Answer» Plasmalemma Desmosome Plasmodesmata Plasmotubule Answer :C

Discussion

6682.	Question : The cyclical changes that occur in the uterus during menustral cycle is confined to this layer
Answer» perimetrium endometrium epimetrium myometrium Answer :B

Discussion

6683.	Question : The cyclical changes in the ovaries of female placental mammals during the reproductive phase differs in primates and nonprimates. a. What is this cycle called in primates and nonprimates respectively? b. Distinguish between seasonal breeders and continuous breeders.
Answer» Solution :a. In PRIMATES the CYCLE is called as menstrual cycle and in NONPRIMATES it is called as oestrus cycle. b. Many MAMMALS living in natural conditions exhibit such REPRODUCTIVE cycles only during favourable seasons, therefore called as seasonal breeders. Others are reproductively active throughout their reproduc tive phase and hence called as continuous breeders.

Discussion

6684.	Question : The cutting of DNA at specific locations became possible with the discovery of
Answer» RESTRICTION ENZYMES probes SELECTABLE markers ligases SOLUTION :restriction enzymes

Discussion

6685.	Question : The cutting of DNA at specific locations became possible with the discovery of molecular scissors.
Answer» SOLUTION :RESTRICTION ENZYMES.

Discussion

6686.	Question : The cutting of DNA by restriction endonucleases results in the fragments of DNA. These fragments can be separated by a technique known as
Answer» PCR moleculardiagonsis ISOLATION of DNA GEL ELECTROPHORESIS Answer :D

Discussion

6687.	Question : The cut end of herbs stem just above: the ground cause loss of water. This is due to
Answer» PHYSICAL FORCE theories Root pressure Vapourisation of water Non-osmotic ABSORPTION of water Answer :B

Discussion

6688.	Question : The curverepresenting the light absorbed at different wavelengths.
Answer» ANSWER :ABSORPTION SPECTRUM

Discussion

6689.	Question : The culture medium (nutrient medium) can be referred to as a .highly enriched laboratory soil.. Justify the statement.
Answer» Solution :The culture MEDIUM (nutrient medium) can be referred to as a .HIGHLY enriched laboratory soil.. culture medium PROVIDES all the necessary nutrients, a carbon source such as SUCROSE and also inorganic salts, vitamins, amino acids and growth regulators like auxins, cytokinins ETC.

Discussion

6690.	Question : The curve obtained when percentage saturation of Hb with O_2 is plotted against pO_2 is
Answer» J shaped Rectangular hyperbola Linear curve Sigmoid curve Answer :D

Discussion

6691.	Question : The culture medium nutrient medium can be referred to as a highly enriched laboratory solid. Justify the statement
Answer» Solution :Culture medium provides all the nutrients required by cells to grow and divide. It contains (a) Macronutrients (nitrogen, calcium phosphorus, sulphur, potassium and magnesium) in the form of salts. (B) MICRONUTRIENTS (copper, zinc, iron, manganese and chlorides). (c) Vitamins (nicotinic acid, thyamine, glycine and PYRIDOXINE) (d) Hormones (IAA, NAA and 2,4-D), and (e) Sucrose.

Discussion

6692.	Question : The cry toxin affects ________ system of insect pests
Answer» RESPIRATORY DIGESTIVE CIRCULATORY IMMUNE SOLUTION :N/A

Discussion

6693.	Question : The crossing of an organism with a double (homozygous) recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is known as
Answer» BACK CROSS test cross RECIPROCAL cross dihybrid cross SOLUTION :reciprocal cross

Discussion

6694.	Question : The crossing over between homologous chromosomes never exceeds beyond
Answer» 0.5 0.75 1 0.85 Answer :A

Discussion

6695.	Question : the crossing over frenquency is proportinal to:
Answer» RECOMBINANT phenotypic frequency haploid NUMBER of CHROMOSOMES diploid number of chromosomes GENOTYPIC frequency Answer :A

Discussion

6696.	Question : The crops engineered for glyphosate are resistant/tolerant to
Answer» BECTERIA INSECTS Herbicides Fungi Answer :C

Discussion

6697.	Question : The crops engineered for glyphosate are resistant to(A) Herbicides(B) Fungi(C) Bacteria(D) Insects
Answer» HERBICIDES FUNGI BACTERIA Insects Solution :Herbicides

Discussion

6698.	Question : The critical research areas of biotechnology are I) providing best catalyst as improved organism, usually a microbe or pure enzyme. II) creating optimal conditions byengineering for a catalyst to act. III) down stream processing technologies, IV) Multiple Ovulation Transfer Technology (MOET). Which of the statements given above are correct?
Answer» I and II I, II and III II, III and IV I, II, III and IV Answer :B

Discussion

6699.	Question : The Critically Endangered and vulnerable plant species are respectively :
Answer» BERBERIS nilghiriensis and Cupressus cashmeriana Santalum album and RAUWOLFIA serpentina Cycas beddomei and PINUS nigra Nepenthes and FICUS religiosa Answer :A

Discussion

6700.	Question : The Cri-du-Chat Syndrome is Caused by Changed in Chromosome Structure involving
Answer» Deletion Duplication Inversion Translocation Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : The development of bioreactors is required to produced large quantities of products. (a) Give optimum growth conditions used in bioreactors.

Question : The detritus food chain begins with:

Question : The development in application of mapping, sequencing and computational procedures for the analysis of entire genome of organisms comes under

Question : The developing spermatoza are nourished by............

Question : The detritus food chain and grazing food chain differ. How?

Question : The details of tricarboxylic acid path was worked out by:

Question : The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following (a) Bacteria……… (b) Banyan ...... (c) Deer ………. (d) Fish ……...

Question : The dental formula for milk teeth in human is (2102)/(2102) The above formula represents :-

Question : The density of a population in a given habitat increases or decreases due to different reasons. Name two factors responsible for increase in population in a given area.

Question : The density of a population in a given habitat increasesor decrease due to different reasons.Name two factors responsible for increase in population ina given area.

Question : The density of a population in a given habitat during a period, fluctuates due to changes in certain basic processes. On this basis, identify A and B boxes in the given flow chart

Question : The densityof a populationin a givenhabitatduringa givenperiodto increasein populationand two of themcontributeto a decrease inpopulation 1. Namethe fourbasicprocess. 2. Whichof thesecausea declineand whichcause anincrease in population?

Question : The density of a population in a given habit during a given period, fluctuates due to changes in certain basic processes. On this basis, fill up boxes A and B in the given flow chart with correct option.

Question : The degenerative and irreversible process in plants.

Question : The deficiency symptom(s) of nitrogen in plants is/are I. dormancy fo lateral buds II. Delaying of flowring III. Inhibits protein synthesis IV. Inhibition of chloroplast formation

Question : The deflection of pitch angle between two successive steps (rungs) of DNA is

Question : The deficiency of vitamin E causes which disease in poultry?

Question : The deficiency of_____causes the death of the stem and root apices.

Question : The deficiency of the vitamin known to cause abrotion in early pregnacty of Rat

Question : The deficiency of potassium produces_____growth in plants.

Question : The deficiencies of micronutrients, not only affects growth of plants but also vital function such as photosynthesis and mitrochondria electron flow. Among the list given below, which group of three elements shall affect most, both photosynthesis and mitrochondrial electron transport ?

Question : The deficiencies of micronutrients not only affect growth of plants but also vital functions, Which group of three elemeµts shall affect most, both photosynthetic and mitochondrial electron transport ?

Question : The deficiency of magnesium results in_____ of the plants.

Question : The deficiency of copper in Citrus results in disease known as ________.

Question : The decrease in the number of leucocytes is termed as_____.

Question : The decomposition of organic matter is brought about by

Question : The ________ deals with the control of several inherited human diseases especially inborn errors metabolism.

Question : The dead component of pholem

Question : The dairy industry covers.........

Question : The cytoplasm of adjacent plant cells is connected to each otherby:

Question : The cyclical changes that occur in the uterus during menustral cycle is confined to this layer

Question : The cyclical changes in the ovaries of female placental mammals during the reproductive phase differs in primates and nonprimates. a. What is this cycle called in primates and nonprimates respectively? b. Distinguish between seasonal breeders and continuous breeders.

Question : The cutting of DNA at specific locations became possible with the discovery of

Question : The cutting of DNA at specific locations became possible with the discovery of molecular scissors.

Question : The cutting of DNA by restriction endonucleases results in the fragments of DNA. These fragments can be separated by a technique known as

Question : The cut end of herbs stem just above: the ground cause loss of water. This is due to

Question : The curverepresenting the light absorbed at different wavelengths.

Question : The culture medium (nutrient medium) can be referred to as a .highly enriched laboratory soil.. Justify the statement.

Question : The curve obtained when percentage saturation of Hb with O_2 is plotted against pO_2 is

Question : The culture medium nutrient medium can be referred to as a highly enriched laboratory solid. Justify the statement

Question : The cry toxin affects ________ system of insect pests

Question : The crossing of an organism with a double (homozygous) recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is known as

Question : The crossing over between homologous chromosomes never exceeds beyond

Question : the crossing over frenquency is proportinal to:

Question : The crops engineered for glyphosate are resistant/tolerant to

Question : The crops engineered for glyphosate are resistant to(A) Herbicides(B) Fungi(C) Bacteria(D) Insects

Question : The Critically Endangered and vulnerable plant species are respectively :

Question : The Cri-du-Chat Syndrome is Caused by Changed in Chromosome Structure involving