24277 + Interview Questions in Biology in Class 12 Page 216 InterviewSolution

10751.	Question : Papillarymusclesare found in:
Answer» VENTRICLES of heart Ventricles of brain Eye Ear Answer :A

Discussion

10752.	Question : PAR is between the range of
Answer» 400 - 600 nm 300 - 600 nm 400 - 700 nm 200 – 700 nm Answer :C

Discussion

10753.	Question : Papilionaceous corolla occurs in
Answer» Brassicaeae Asteraceae Fabaceae Poaceae Answer :C

Discussion

10754.	Question : Pappus is present in compositae for :
Answer» AIR dispersion Insect pollination Water pollination None of the above Answer :D

Discussion

10755.	Question : Papaya plants exhibit xenogamy only. Why?
Answer» SOLUTION :Because the male and female FLOWER of papaya are PRESENT in DIFFERENT plants.

Discussion

10756.	Question : Pannus formation takes place in :-
Answer» IDDM SCID Rheumatoid arthritis Hashimoto's disease Answer :C

Discussion

10757.	Question : Paneth cells are found in:
Answer» CRYPTS of Lierberkuhn Organ of Cortin Peyer's patches Islets of Langerhans Answer :A

Discussion

10758.	Question : Pancreatic lipase acts in:
Answer» Monoglyceride Dipeptide Triglyceride Polysaccharide Answer :C

Discussion

10759.	Question : Pancreatic acini are:
Answer» ENDOCRINE glands Exocrine glands Heterocine glands Unicellular glands Answer :B

Discussion

10760.	Question : PAN stands for................
Answer» Peroxy ACETIC NITROGEN PERCHLORO acetate Peroxyacetyl nitrate Peractyl nitroxide Solution :Peractyl nitroxide

Discussion

10761.	Question : Palmella stage is present in
Answer» Aspergillus Cystopus Chlamydomonas None of these Solution :Palmella stage is present in Chlamydomonas. In adverse conditions, the daughter protoplasts FORMED by division, do not DEVELOP neuromotor apparatus and become motile. However, the parent cell wall gelatinises and foms a matrix around the daughter protoplasts. All CELLS of palmella stage develop flagelle and become motile. They escape from the GELATINOUS matrix on the arrival of favourable conditions.

Discussion

10762.	Question : Palmately compound leaves are found in :-
Answer» Neem Silk cotton Mango Peepal Answer :B

Discussion

10763.	Question : Palindromic nucleotide sequences have significance in recombinant DNAtechonology. Explain. Give example for a palindromic DNA sequence .
Answer» Solution :Palindrome in a DNA is a, sequence of base pairs that reads same on the two strands when orientation of reading is kept the same . Each restric-tion endonuclease RECOGNISES a specific palindromic nucleotide sequence and CUTS the strand of DNA a little away from the CENTRE of the palin-drome site, but between the two bases on the opposite strands. Example of palindrome DNA is 5. - GAATTCC - 3. 3. - CTTAAG - 5.

Discussion

10764.	Question : Palaeontologists unearthed a human skull during excavation. A small fragment of the scalp tissue was still attached to it. Only Iittle DNA could be extracted from it. If the genes of the ancient man need to be analysed, the best way of getting sufficient amount of DNA from this extract is
Answer» Hybridising the DNA with a DNA probe Subjecting the DNA to POLYMERASE chain reaction Subjecting the DNA to GEL electrophoresis Treating the DNA with restriction endonuclease Answer :B

Discussion

10765.	Question : Palaeontology
Answer» SOLUTION :It is the study of PAST life BASED on the fossil records. It furnishes the most direct and most reliable EVIDENCE for evolution.

Discussion

10766.	Question : Palaentological evidences for evolution refer to the
Answer» development of embryo homologous ORGANS FOSSILS analogous organs. Solution :Palaeontological EVIDENCES for evolution refer to the fossils. Fossils provide direct and solid evidence in favour of organic evolution through ages. Fossils are studied for knowing about extinct organisms. Birbal Sahni Institute of Palaeobotany is situated at Lucknow. Birbal Sahni is called .Father of Indian Palaeobotany.. Age of fossils is determined by Uranium-Lead method `(U^(238))` or Potassium-Argon method or Radioactive CARBON dating `(C^(14))`. ESR (electron-spin-resonance method) is the most accurate method of dating offossils. Development of Embryo is evident in Embryology. Homologus and ANALOGUS organs are used in Morphological Evidence.

Discussion

10767.	Question : Pairingof homologous chromosomes
Answer» ANSWER :SYNAPSIS

Discussion

10768.	Question : Pair of coding which are according for their function or specific code for amino acid.
Answer» GUU, GCU - alanin UAG, UGA - TERMINATION code AUG, ACG - STARTING code or metheonin UUA, UCA - lucin Solution :UAG, UGA - termination code

Discussion

10769.	Question : Painless open sore called chancre is the characteristic feature of
Answer» GENITAL herpes Chancroid Genital wart Syphilis Answer :D

Discussion

10770.	Question : Pad-like fingertips are present in:
Answer» LEMUR Lorises Tarsiers Squirrel Answer :C

Discussion

10771.	Question : Paddy, Wheat and Sorghum, etc., comes under the category of cereals. All the members of cereals belong to which of the following family?
Answer» a) Fabaceae B) Poaceae c) Leguminoneae d) Caesalpinaeceae Answer :B

Discussion

10772.	Question : P_(680) is calld PS II ! C-4 plants hav photorespiration.
Answer» If both As and R are CORRECT and R is correct EXPLANATION of As If both As and R are correct but R is not correct explanation of As If As is correct, R is wrong If both As and R are wrong. Answer :C

Discussion

10773.	Question : (p + q)^2 =p^2 + 2pq + q^2 = 1represents an equation used in
Answer» population GENETICS mendelian genetics biometrics molecular genetics Solution :`(p + Q)^2 =p^2 + 2pq + q^2 = 1` represents an EQUATION USED in populatioll genetics. Above equation is known as Hardy-Weinberg principle in which `p^2`-Dominant homozygous `2pq`- Heterozygous `q^2`-Recessive homozygous

Discussion

10774.	Question : p^2+2pq+q^2=1.The eqaution is the mathematical expression of which law?
Answer» SOLUTION :Hardy-Weinberg PRINCIPLE

Discussion

10775.	Question : (p+q)^(2) = p^(2) + 2pq + q^(2) = 1 represents an equation used in
Answer» POPULATION genetics mendelian genetics biometrics molecular genetics Answer :A

Discussion

10776.	Question : Ozonesaves the biosphere by absorbingthe high energyradiation called .
Answer» Infra - red (IR) ULTRAVIOLET RAY (UV) X-ray Gamma rays Answer :B

Discussion

10777.	Question : Ozone layer of upper atmosphere is being destroyed by
Answer» chlorofluorocarbons `SO_(2)` `O_(2) " and " CO_(2)` smog. Solution :CFCs are WIDELY used as refrigerants. CFCs discharged in the lower PART of atmosphere MOVE upward and reach stratosphere. In stratosphere, UV rays act on them releasing CL atoms. Cl degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts, Cl atoms are not consumed in the reaction. CFCs added to the stratosphere have permanent and CONTINUING affects on ozone levels.

Discussion

10778.	Question : Ozone layer is present ina)Lithosphereb)Stratospherec)Troposphered)Mesosphere
Answer» LITHOSPHERE STRATOSPHERE Troposhere Mesosphere Answer :B

Discussion

10779.	Question : Ozone layer is beneficial to biodiversity'. Give reason.
Answer» Solution :Because OZONE layer absorbs dangerous ULTRA violet RAY from SUN and protect the LIFE on earth.

Discussion

10780.	Question : Ozone layer in the stratosphere beocmes thinnerdue to the release of CFC. Give a scientific reason for this.
Answer» Solution :UV rays ACT on CFCs and release CI atoms which act as catalyst degrade OZONE and release molecular oxygen.

Discussion

10781.	Question : Ozone layer is present in :
Answer» ANSWER :A

Discussion

10782.	Question : Ozone is produce naturally by high energy solar radiations and the activity of methane (CH_(4) in the presence of:
Answer» NITROGEN oxide Sulphur DIOXIDE CARBON monoxide Carbon dioxide Answer :A

Discussion

10783.	Question : Ozone depletion is occurring widely in the strato-sphere, it leads to ozone hole caused mainly due to ……………………
Answer» ethylene methane CFCs `CO_(2)` ANSWER :C

Discussion

10784.	Question : Ozone hole means:
Answer» HOLE in the STRATOSPHERE Same CONCENTRATION of ozone decrease in concentration of ozone increase in the concentration of ozone Answer :C

Discussion

10785.	Question : Why does ozone hole form over Antarctica ? How will enhanced ultraviolet radiation affect us ?
Answer» Solution :Extreme low TEMPERATURE `(-85^(@)C)` forms ice clouds which provides catalytic surface for the reaction of CHLORINE atoms and the ozone polar VORTEX is formed which isolates air from REST of the world.

Discussion

10786.	Question : Ozone depletion in stratosphere shall result in
Answer» FOREST fires Increased INCIDENCE of SKIN cancer Global warming None of these Answer :B

Discussion

10787.	Question : Ozone acts as a shield for absorbing ultraviolet radiations from the sun. Write the unit used to measure ozone layer.
Answer» SOLUTION :DOBSON UNIT /DU

Discussion

10788.	Question : Ozone acts as a shield for absorbing ultraviolet radiations from the sun. Name the region of atmosphere where ozone is seen.
Answer» SOLUTION :Strosphere

Discussion

10789.	Question : Ozone acts as a natural sun screen-Justify.
Answer» Solution :OZONE depletion in the stratosphere results in more UV RADIATIONS especially UV B radiations (shortwaves). UV B radiation destroys biomolecules (skin ageing) and damages living tissues. UV - C is the most damaging type of UV radiation, but it is completely filtered by the atmosphere (ozone layer). UV - a contribute 95% of UV radiation which causes TANNING burning of skin and enhancing skin cancer. Hence the uniform ozone layer is critical for the wellbeing of life on earth

Discussion

10790.	Question : Oxytocin responsible for vigorous contraction of uterus at the time of child birth is synthesize by:-
Answer» POSTERIOR PITUITARY gland Hypothalamus Both 1 and 2 Anterior pituitary gland Answer :B

Discussion

10791.	Question : Oxytocin is the first hormone prepared by genetic engineering.
Answer»

Discussion

10792.	Question : Oxyhaemoglobin dissociated at:
Answer» <P>LOW `P_(O_2)` in tissue High `P_(O_2)` in tissue Equal `P_(O_2)` All TIME IRRESPECTIVE of `P_(O_2)` ANSWER :A

Discussion

10793.	Question : Oxygenic photosynthesis is absent in :-
Answer» Spirulina Rhodospirillum Oscillatoria Macrocystis Answer :B

Discussion

10794.	Question : Oxygenic photosynthesis occurs in
Answer» CHROMATIUM CHLORELLA RHODOSPIRILLUM Chlorobium Answer :B

Discussion

10795.	Question : Oxygen is utilised by the organism to (a)_____ breakdown nutrietns molecules the (b)_____ and to derive (c)______ for performing various activities
Answer» ANSWER :(a) INDIRECTLY (b) GLUCOSE (C) Energy

Discussion

10796.	Question : Oxygen is absorbed-in the molecular form the______by the plant.
Answer» ANSWER :WATER

Discussion

10797.	Question :Oxygen evolved during photosynthesis in Chlorella comes from
Answer» `CO_2` `CH_2O` `H_2O` Both (1) & (2) ANSWER :C

Discussion

10798.	Question : Oxygen evolving and nitrogen fixing organisms is
Answer» Azotobacter Nostoc Frankia Clostridium Answer :B

Discussion

10799.	Question : Oxygenevolution lakesplace duringphotosynthesisin green plantsbut not in bacterial photosynthesis because
Answer» BACTERIA are PROKARYOTIC and green plantsare eukaryotic only photosystem I is present in bacterial photosynthesis bactreial cell WALL compositionis DIFFERENT from greenplant cell wall rate of `O_(2)`consumption in bacteria is higherthan the green plants Answer :B

Discussion

10800.	Question : Oxygen dissociation curve of haemoglobinis is
Answer» sigmoid hyperbolic linear hypobolic Solution :Oxygen haemoglobin dissociation curve gives the relationship between the saturaition of haemoglobin and oxygen tension. The curve obtained by plotting the PER CENT saturation of Hb against time is sigmoid, at 38°C and pH 7.4. Dissociation of oxyhaemoglobin can be promoted by rise in the BODY temperature and low pH (HIGH `CO_(2)`).

Discussion

Explore topic-wise InterviewSolutions in .

Question : Papillarymusclesare found in:

Question : PAR is between the range of

Question : Papilionaceous corolla occurs in

Question : Pappus is present in compositae for :

Question : Papaya plants exhibit xenogamy only. Why?

Question : Pannus formation takes place in :-

Question : Paneth cells are found in:

Question : Pancreatic lipase acts in:

Question : Pancreatic acini are:

Question : PAN stands for................

Question : Palmella stage is present in

Question : Palmately compound leaves are found in :-

Question : Palindromic nucleotide sequences have significance in recombinant DNAtechonology. Explain. Give example for a palindromic DNA sequence .

Question : Palaeontology

Question : Palaentological evidences for evolution refer to the

Question : Pairingof homologous chromosomes

Question : Pair of coding which are according for their function or specific code for amino acid.

Question : Painless open sore called chancre is the characteristic feature of

Question : Pad-like fingertips are present in:

Question : Paddy, Wheat and Sorghum, etc., comes under the category of cereals. All the members of cereals belong to which of the following family?

Question : P_(680) is calld PS II ! C-4 plants hav photorespiration.

Question : (p + q)^2 =p^2 + 2pq + q^2 = 1represents an equation used in

Question : p^2+2pq+q^2=1.The eqaution is the mathematical expression of which law?

Question : (p+q)^(2) = p^(2) + 2pq + q^(2) = 1 represents an equation used in

Question : Ozonesaves the biosphere by absorbingthe high energyradiation called .

Question : Ozone layer of upper atmosphere is being destroyed by

Question : Ozone layer is present ina)Lithosphereb)Stratospherec)Troposphered)Mesosphere

Question : Ozone layer is beneficial to biodiversity'. Give reason.

Question : Ozone layer in the stratosphere beocmes thinnerdue to the release of CFC. Give a scientific reason for this.

Question : Ozone layer is present in :

Question : Ozone is produce naturally by high energy solar radiations and the activity of methane (CH_(4) in the presence of:

Question : Ozone depletion is occurring widely in the strato-sphere, it leads to ozone hole caused mainly due to ……………………

Question : Ozone hole means:

Question : Why does ozone hole form over Antarctica ? How will enhanced ultraviolet radiation affect us ?

Question : Ozone depletion in stratosphere shall result in

Question : Ozone acts as a shield for absorbing ultraviolet radiations from the sun. Write the unit used to measure ozone layer.

Question : Ozone acts as a shield for absorbing ultraviolet radiations from the sun. Name the region of atmosphere where ozone is seen.

Question : Ozone acts as a natural sun screen-Justify.

Question : Oxytocin responsible for vigorous contraction of uterus at the time of child birth is synthesize by:-

Question : Oxytocin is the first hormone prepared by genetic engineering.

Question : Oxyhaemoglobin dissociated at:

Question : Oxygenic photosynthesis is absent in :-

Question : Oxygenic photosynthesis occurs in

Question : Oxygen is utilised by the organism to (a)_____ breakdown nutrietns molecules the (b)_____ and to derive (c)______ for performing various activities

Question : Oxygen is absorbed-in the molecular form the______by the plant.

Question :Oxygen evolved during photosynthesis in Chlorella comes from

Question : Oxygen evolving and nitrogen fixing organisms is

Question : Oxygenevolution lakesplace duringphotosynthesisin green plantsbut not in bacterial photosynthesis because

Question : Oxygen dissociation curve of haemoglobinis is

Question : Oxygen is utilised by the organism to (a)___ breakdown nutrietns molecules the (b)_ and to derive (c)____ for performing various activities