24277 + Interview Questions in Biology in Class 12 Page 374 InterviewSolution

18651.	Question : Definition ofF_2 generation :
Answer» SOLUTION : The OFFSPRINGS of the second generation produced DUE to self CROSS of `F_1` individuals are said to be `F_2` individuals and they REPRESENT second filial generation.

Discussion

18652.	Question : Defination ofEpistatic Gene or Inhibitory Gene:
Answer» SOLUTION :It is the interaction between two non-allelic genes, in which ONE GENE masks or suppresses the expression of other. The gene which got SUPPRESSED is CALLED Epistatic factor, such an interaction is called epistasis.

Discussion

18653.	Question : Defination ofDominant gene:
Answer» Solution :The alleles which is EXPRESSED is called DOMINANT GENE.

Discussion

18654.	Question : Defination ofDihybrid cross :
Answer» Solution :It is a CROSS where two forms of two traits are BROUGHT TOGETHER or HYBRIDIZED,

Discussion

18655.	Question : Defination ofDihybrid experiment:
Answer» Solution :The crossing of TWO PLANT DIFFERING in two character is CALLED dihybrid experiment.

Discussion

18656.	Question : Defination ofCo-dominance :
Answer» SOLUTION :The alleles which are ABLE to express themselves INDEPENDENTLY when PRESENT together are called co-dominant alleles and this phenomenon is TERMED as co-dominance.

Discussion

18657.	Question : Defination ofComplementary Gene:
Answer» SOLUTION :It is a phenomenon when two pairs of non-allelic dominant GENES, which interact to produce only ONE PHENOTYPIC trait. But neither of them (if present alone) produces the trait in the absence of other.

Discussion

18658.	Question : Defination ofAlleles :
Answer» Solution :Genes which CODE for a PAIR of CONTRASTING TRAIT are known as alleles i.e., they are slightly DIFFERENT from the same gene.

Discussion

18659.	Question : Deficiency symptoms of nitrogen and potassium are visible first in
Answer» Buds Senescent leaves Young leaves Roots ANSWER :2

Discussion

18660.	Question : Deficiency of which vitamin cause Macrocytic anaemia
Answer» Biotin Cymacobalamin Folic ACID PYRIDOXINE ANSWER :C

Discussion

18661.	Question : Deficiency symptom of N,K and Mg appears first in
Answer» YOUNGER leaves Senescent leaves Roots Both(2) & (3) ANSWER :B

Discussion

18662.	Question : Deficiency of whichset ofmineralsfirstappear in olderleaves ?
Answer» N, K, MG N,Mg, CA S, B, Mg Mg, Ca, Fe ANSWER :A

Discussion

18663.	Question : Deficiency of which of the following can cause yellowing of intravenous region of leaves?
Answer» Calcium Potassium Copper Phosphorus Answer :B

Discussion

18664.	Question : Deficiency of _____ vitamin impairs insulin synthesis.
Answer» ANSWER :VITAMIN C

Discussion

18665.	Question : Deficiency of iron causes
Answer» redused lraves and STUNTED growth bending of LEAF tip interveinal chlorosis decrease in PROTIEN synthesis Answer :C

Discussion

18666.	Question : Deficiency of vitamin B1 cause the disease_____
Answer» ANSWER :BERIBERI

Discussion

18667.	Question : Deficiency of iron causes :
Answer» Decreases in protein SYNTHESIS Reduced LEAVES and stunted growth Interveinal CHLOROSIS FIRST on young leaves Bending of LEAF tip Answer :C

Discussion

18668.	Question : Hyposecretion of _____ is responsible for diabetes insipidus.
Answer» ANSWER :Vasopressin/Antidiuretic hormone/Pitressin

Discussion

18669.	Question : Deficiency in the secretion of insulin causes which disease ?
Answer» ANSWER :DIABETES MELLITUS

Discussion

18670.	Question : Decribethe structure of cerebrum .Add a note on the fucntion.
Answer» Solution :Cerebrum is the largest part of the brain 80-85 % of the brain A median fussure diveides cerentrum into two hyemispheres which are connected by a thick band of fivres called corpus CALLOSUM. Outer part is cortex. While the inner part is medulla . Roof is called pallium, which is highly folded to from GYRI and sulci. Sulci are depressions and gyri are rides. Vertrolateral walls of cerebrum into thick and called corpora striata. Ventrolateral walls of cerebrumare thick and called corpora striata. Sulic divides hemisphere into four loots loves - frontal. parieta, OCCIPITAL and temporal lobes. Functions of cerebrum : 1. Cerebrum controls the voluntary activities. 2. It responds to vision, taste, smell, sound. touch speech etc. 3. Centre for micturation , defeaction, weeping laughing . It is also the centre of memorly , intelligence, will power, reasoning , learning . EMOTION , fear, pressure , temperature , feelintgs are controlled by cerebrum .

Discussion

18671.	Question : Decrease in the lumen of arteries is called
Answer» ARTERIOSCLEROSIS ischaemia atherosclerosis arrythmia Answer :C

Discussion

18672.	Question : Decreasing effect of O_2 concentration on the rateof•photosynthesis is called_____ effect.
Answer» ANSWER :warberg

Discussion

18673.	Question : Decrease in quantum yield of photosynthesis inred spectrum from thatofnormalspectrum.
Answer» ANSWER :red-drop

Discussion

18674.	Question : Decomposition is the process in which complex dead matters are broken down into simpler inorganic substances. Name the step of decomposition in which biological activity not found?
Answer» SOLUTION :HUMIFICATION

Discussion

18675.	Question :Decrease in photosynthetic rate With increased availability of oxygen is called:
Answer» RICHMOND lang effect Warburg effect Emerson ENHANCEMENT effect Blackman's LAW of limiting factor Answer :B

Discussion

18676.	Question : Decomposition is the breakdown of complex organic matter into inorganic substances like CO_2, Water etc. Find out any two conditions which inhibit decomposition.
Answer» SOLUTION :LOW TEMPERATURE ANAEROBIOSIS

Discussion

18677.	Question : Decomposition is favoured by
Answer» WARM and MOIST environment Rich amount of nitrogen and water soluble substance like SUGAR in detritus Aerobic environment All the above Solution :All the above

Discussion

18678.	Question : "Decomposition is an oxygen requiring process" comment.
Answer» Solution :(a) Detritus is rich in nitrogen and sugars. (b) For OXIDATION of nitrogen and sugars OXYGEN is required by a CLASS of AEROBIC microbes.

Discussion

18679.	Question : Decomposers shows
Answer» Intracellular DIGESTION EXTRACELLULAR digestion Both (A) & (B) No digestion at all Solution :Extracellular digestion

Discussion

18680.	Question : Decomposers like fungi and bacteria are : (i) autotrophs (ii) heterotrophs (iii) saprotrophs (iv) chemo-autotrophs Choose the correct answer :
Answer» i and iii i and iv ii and iii i and ii Solution :AUTOTROPHS are chemical synthesis autotrophs and photosynthetic autotrophs which can make their own FOOD, e.g., plants. When living organisms get their food from autotrophs or plants, they are known as heterotrophs. Heterotrophs can be PLANT eaters, carnivores and omnivores. Saprotrophs they get their nutrition from dead organic matter or both live in plants and animals. They are called as DECOMPOSERS because they decompose dead organic matter and play an important role in cycling of mineralization.

Discussion

18681.	Question : Decomposers like fungi and bacteria are: (i) Autotrophs (ii) Heterotrophs (iii) Saprotrophs (iv) Chemo-autotrophs. Choose the correct answer:
Answer» (i) and (III) (i) and (IV) (II) and (iii) (i) and (ii) ANSWER :C

Discussion

18682.	Question : Decomposers are rich in
Answer» ACIDIC SOIL ALKALINE soil NEUTRAL soil more acidic soil Answer :C

Discussion

18683.	Question : Decomposers are
Answer» AUTOTROPHS AUTO HETEROTROPHS ORGANOTROPHS Heterotrophs SOLUTION :Heterotrophs

Discussion

18684.	Question : Decline in hearing power begins after the age of
Answer» 50 years 35 years 45 years 10 years Answer :D

Discussion

18685.	Question : Deciduous forests have,
Answer» VARIETY of grasses Broad -LEAVED trees NARROWED -leaved trees Variety of CROCODILES Solution :Broad -leaved trees

Discussion

18686.	Question : Decaying Biomass is formed through the processof decomposition, from which different types of mineral ions are released based on the mineralisers act on it. Name the microorganisms that helps to release phosphate and nitrate into the soil.
Answer» SOLUTION :PHOSPHATE SOLUBILIZING BACTERIA and NITRIFYING bacteria

Discussion

18687.	Question : Decaying Biomass is formed through the processof decomposition, from which different types of mineral ions are released based on the mineralisers act on it. Give an example for nutrient cycling that helps in the photosynthesis of land plants.
Answer» SOLUTION :CARBON CYCLE

Discussion

18688.	Question : "Death due to cancer is high now-a-days State the role of alpha-interferon in cancer treatment
Answer» Solution :`alpha`-interferons act as biological RESPONSE MODIFIERS which ACTIVATE their IMMUNE system and help in destroying TUMOUR.

Discussion

18689.	Question : Deamination occurs in liver to -
Answer» Make the use of excess amino acid. Synthesise amino acids. Get rid of UREA from blood Convert PROTEINS into URIC acid. Answer :A

Discussion

18690.	Question : "Death due to cancer is high now-a-days Name the gene causing cancer
Answer» SOLUTION :ONCOGENE

Discussion

18691.	Question : Deadtorn cells of root cap are replaced by the activity of
Answer» Dermatogen Periblem Plerome Calyptrogen Answer :A

Discussion

18692.	Question : Dead and dried cell mass of microbes having nutritive value is also known as ………………..
Answer» BGA ( BLUE Green Algae ) SCP ( Single Cell Protein ) STP ( SEWAGE Treatment PLANT ) VAM ( Vesicular Arbuscular Mycorrhizae ) Answer :B

Discussion

18693.	Question :De-Vries gave his mutation theory on organic evolution while working on
Answer» PISUM sativum drosophila melanogaster OENOTHERA lamarckiana althea rosea SOLUTION :Oenothera lamarckiana

Discussion

18694.	Question : de Vries gave his mutation theory on organic cvolution while working on
Answer» OENOTHERA lamarckiana Drosophila melanogaster Pisum sativum Althaea rosea Answer :A

Discussion

18695.	Question : DDT is a _________ pollutant.
Answer» ANSWER :A::B::D

Discussion

18696.	Question : Now-a-days use of DDT as insecticide is banned because
Answer» bioaccumulation biomagnification uselessness toxicity Answer :B

Discussion

18697.	Question : DDT concentrartion recorded in human body has been
Answer» 0.3-0.7 PPM 1.3-3.1 ppm 13-31 ppm 30-70 ppm . ANSWER :C

Discussion

18698.	Question : DDT concetration recorded in human body has been :
Answer» 0.3 - 0.7 ppm 1.3 -3.1 ppm 13 -31 ppm 30 -70 ppm Answer :C

Discussion

18699.	Question : DCMU
Answer» INHIBITS PS-I Inhibits PS-II Destroy CHLOROPLAST Inhibits oxidadtivephosphorylation Answer :B

Discussion

18700.	Question : Dengue fever is caused by ------
Answer» SOLUTION :Flari VIRUS

Discussion

Explore topic-wise InterviewSolutions in .

Question : Definition ofF_2 generation :

Question : Defination ofEpistatic Gene or Inhibitory Gene:

Question : Defination ofDominant gene:

Question : Defination ofDihybrid cross :

Question : Defination ofDihybrid experiment:

Question : Defination ofCo-dominance :

Question : Defination ofComplementary Gene:

Question : Defination ofAlleles :

Question : Deficiency symptoms of nitrogen and potassium are visible first in

Question : Deficiency of which vitamin cause Macrocytic anaemia

Question : Deficiency symptom of N,K and Mg appears first in

Question : Deficiency of whichset ofmineralsfirstappear in olderleaves ?

Question : Deficiency of which of the following can cause yellowing of intravenous region of leaves?

Question : Deficiency of _____ vitamin impairs insulin synthesis.

Question : Deficiency of iron causes

Question : Deficiency of vitamin B1 cause the disease_____

Question : Deficiency of iron causes :

Question : Hyposecretion of _____ is responsible for diabetes insipidus.

Question : Deficiency in the secretion of insulin causes which disease ?

Question : Decribethe structure of cerebrum .Add a note on the fucntion.

Question : Decrease in the lumen of arteries is called

Question : Decreasing effect of O_2 concentration on the rateof•photosynthesis is called_____ effect.

Question : Decrease in quantum yield of photosynthesis inred spectrum from thatofnormalspectrum.

Question : Decomposition is the process in which complex dead matters are broken down into simpler inorganic substances. Name the step of decomposition in which biological activity not found?

Question :Decrease in photosynthetic rate With increased availability of oxygen is called:

Question : Decomposition is the breakdown of complex organic matter into inorganic substances like CO_2, Water etc. Find out any two conditions which inhibit decomposition.

Question : Decomposition is favoured by

Question : "Decomposition is an oxygen requiring process" comment.

Question : Decomposers shows

Question : Decomposers like fungi and bacteria are : (i) autotrophs (ii) heterotrophs (iii) saprotrophs (iv) chemo-autotrophs Choose the correct answer :

Question : Decomposers like fungi and bacteria are: (i) Autotrophs (ii) Heterotrophs (iii) Saprotrophs (iv) Chemo-autotrophs. Choose the correct answer:

Question : Decomposers are rich in

Question : Decomposers are

Question : Decline in hearing power begins after the age of

Question : Deciduous forests have,

Question : Decaying Biomass is formed through the processof decomposition, from which different types of mineral ions are released based on the mineralisers act on it. Name the microorganisms that helps to release phosphate and nitrate into the soil.

Question : Decaying Biomass is formed through the processof decomposition, from which different types of mineral ions are released based on the mineralisers act on it. Give an example for nutrient cycling that helps in the photosynthesis of land plants.

Question : "Death due to cancer is high now-a-days State the role of alpha-interferon in cancer treatment

Question : Deamination occurs in liver to -

Question : "Death due to cancer is high now-a-days Name the gene causing cancer

Question : Deadtorn cells of root cap are replaced by the activity of

Question : Dead and dried cell mass of microbes having nutritive value is also known as ………………..

Question :De-Vries gave his mutation theory on organic evolution while working on

Question : de Vries gave his mutation theory on organic cvolution while working on

Question : DDT is a _________ pollutant.

Question : Now-a-days use of DDT as insecticide is banned because

Question : DDT concentrartion recorded in human body has been

Question : DDT concetration recorded in human body has been :

Question : DCMU

Question : Dengue fever is caused by ------