24277 + Interview Questions in Biology in Class 12 Page 35 InterviewSolution

1701.	Question : What is the common name of Apis mellifera?
Answer» Solution :The COMMON name of Apis mellifera is EUROPEAN honeybee.

Discussion

1702.	Question : What isthecommonpoint of similarity between DNA and RNA
Answer» Both are DOUBLE stranded Both have IDENTICAL SUGAR molecules Both have identical PYRIMIDINE bases Both are POLYMERS of nucleotides Answer :D

Discussion

1703.	Question : What is the common mode of asexual reproduction in chrysophytes?
Answer» FRAGMENTATION REGENERATION BINARY FISSION Sporulation Answer :C

Discussion

1704.	Question : What is the common method of propagation in Bryophyllum?
Answer» SOLUTION :The common METHOD of vegetative propagation in Bryophyllum is by means of LEAF BUDS which DEVELOP in marginal notches of the leaf.

Discussion

1705.	Question : What is the circulating fluid in cockroach?
Answer» ANSWER :HAEMOLYMPH

Discussion

1706.	Question : What is the chemical process by which ammonia is seperated from amino acids?
Answer» ANSWER :DEAMINATION

Discussion

1707.	Question : What is the chemical nature of biogas. Name an organism which is involved in biogas production?
Answer» SOLUTION :(a) Biogas is a mixture of METHANE (50-70%), `CO_2 `(25-35%), and HYDROGEN (1-5%). (b) Bacteria producing biogas are called methanogens. METHANOBACTERIUM is one of the methanogen.

Discussion

1708.	Question : What is the chemical nature of biogas ? Name an organism which is involved in biogas production.
Answer» Solution :The CHEMICAL nature of Biogas is METHANE, `CO_2`and `H_2` . METHANOBACTERIUM, a type of methanogen is used for biogas production.

Discussion

1709.	Question : What is the chemical name of common sugar.
Answer» ANSWER :SUCROSE

Discussion

1710.	Question : What is the chemical name of vitaminC?
Answer» ANSWER :ASCORBIC ACID

Discussion

1711.	Question : What is the characteristic feature that is observed in seral communities during different stages succession?
Answer» Solution :In the successive seral stages there is a change in the diversity of SPECIES of organisms, INCREASE in the number of species and organisms as well as an increase in the TOTAL BIOMASS.

Discussion

1712.	Question : What is the characteristic feature of humaninsulin ?
Answer» Solution :INSULIN is a hormone made byan organ LOCATED behind the stomach CALLED pancreas. Thefirstgenerationof man made insulin is called " human insulin " Syntheitc insulin is madebothin BACTERIA and YEAST.

Discussion

1713.	Question : What is the cause of Thalassemia?
Answer» Solution :Thalassemia is caused due to decreased SYNTHESIS of either `ALPHA` or `BETA` chain of HbA. It is a quantitative abnormality of polypeptide globin chain synthesis.

Discussion

1714.	Question : What is the cause of Thalassemia ?
Answer» SOLUTION :Thalassemia is caused due to decreased synthesis of either `ALPHA` or `BETA` GLOBIN chain of HbA. It is QUANTITATIVE abnormality of polypeptide globin chain synthesis.

Discussion

1715.	Question : What is the cause of sickle-celled anemia?
Answer» SOLUTION :SINGLE GENE DISORDER

Discussion

1716.	Question : What is the cause of sickle-cell anaemia?
Answer» Solution :Gene MUTATION which CHANGES HAEMOGLOBIN COMPOSITION and forms of R.B.C.

Discussion

1717.	Question : What is the cause of low farm productivity per unit in India?
Answer» CONVENTIONAL practices of animal breeding and care No or less use of new technologies of animal FARMING less than 30% of world's LIVESTOCK population is in INDIA both (1)and (2)are correct Answer :D

Discussion

1718.	Question : What is the cause of Phenylketonuria. Explain the disorder.
Answer» Solution :Phenylketonuria is an inborn genetic disorder in which, the homozygous recessive individual lacks the phenylalanine hydroxylase needed to change the amino acid, phenylalanine to tyrosine. As a result of this phenylalanine is ACCUMULATED and converted into phenylpyruvic acid and other derivatives. Accumulation of these in brain results in mental RETARDATION. These are also excrete through urine because of its poor absorption by kidney. Lack of the ENZYMES is due to the abnormal AUTOSOMAL recessive gene on chromosome 12.

Discussion

1719.	Question : What is the cause of discontinuous synthesis of DNA on one of the parental strands of DNA ? What happens to these short stretches of synthesised DNA ?
Answer» Solution :The DNA-dependent DNA polymerases catalyse POLYMERISATION only in ONE direction, that is `5.rarr3.`. This creates some additional complications at the REPLICATING fork. Consequently, on leading strand (the template with polarity `3.rarr5.`, the replication is CONTINUOUS, while on the lagging strain (the template with polarity `5.rarr3.`, it is discontinuous. The discontinuously synthesised fragments as OKAZAKI fragments are later joined by the enzyme DNA ligase.

Discussion

1720.	Question : What is the cause of large holes in swiss cheese?
Answer» SOLUTION :PRODUCTION of LARGE AMOUNT of `CO_2`by bacterial ACTIONS

Discussion

1721.	Question : What is the cause of diabetes insipidus? What is the symptom of it?
Answer» SOLUTION :Low secretion of ADH CAUSES DIABETES INSIPIDUS.

Discussion

1722.	Question : What is the cause of altitude sickness at high altitudes?
Answer» Solution :It is due to the low atmospheric PRESSURE of HIGH ALTITUDES that the body is unable to get ENOUGH OXYGEN.

Discussion

1723.	Question : What is the cause of ADA deficiency?
Answer» Solution :ADA DEFICIENCY is caused due to deletion of the gene for ADENOSINE DEAMINASE SYNTHESIS,

Discussion

1724.	Question : What is the cause of adenosine deaminase deficiency in humans?
Answer» Solution :Due to loss of GENE for ENZYME ADENOSINE DEAMINASE

Discussion

1725.	Question : What is the capillary network enclosed by Bowman's capsules called?
Answer» ANSWER :GLOMERULUS

Discussion

1726.	Question : What is the capacity of urinary bladder?
Answer» Solution :URINARY BLADDER can STORE urine upto 500 ML to 1 mitre.

Discussion

1727.	Question : What is the called the organ transplantation of the organs of two different species ?
Answer» AUTOGRAFT Homograft Heterograft Allоgrаft SOLUTION :Heterograft

Discussion

1728.	Question : What is the cancer that occurs in skin or lining of internal organs called ?
Answer» ANSWER :CARCINOMA

Discussion

1729.	Question : What is the bundle of nerve fibre termed as ?
Answer» ANSWER :FASCICULUS

Discussion

1730.	Question : What is the blueprint of humanity ?
Answer» Solution :The complete sequence of human genome is CALLED a ''blueprint'' of humanity as it CONTAINS the scientific keys to UNDERSTANDING our biology and BEHAVIOURS.

Discussion

1731.	Question : What is the biodiversity in reference to latitudinal gradient from higher latitude to lower latitude ?
Answer» INCREASES DECREASES RISE or DECREASE Uncertain Solution :Increases

Discussion

1732.	Question :What is the biochemical reaction of yeast fermentation of molasses for alcoholic fermentation.
Answer» SOLUTION :`C_6H_12O_6 + ` YEAST ` to UNDERSET("ETHYL ALCOHOL")(2C_2H_5OH) + 2CO_2`

Discussion

1733.	Question : What is the best solution for the treatment of electronic wastes ?
Answer» SOLUTION :RECYCLING

Discussion

1734.	Question : What is the best pH the soil cultivation of plants:-
Answer» 3.4 – 5.4 6.5 – 7.5 4.5 – 8.5 5.5 – 6.5 Answer :D

Discussion

1735.	Question : What is the beginning of the menstrual cycle called?
Answer» SOLUTION :The BEGINNING of the menstrual CYCLE is called MENARCHE.

Discussion

1736.	Question : What is the basis of variations in the physical and chemical conditions of different habitats ?
Answer» Solution :•The variations in the different TYPES of habitats is due to the following factors, • (a) Abiotic FACTOR : TEMPERATURE, WATER, Light and Soil. • (b) Biotic factor : Pathogens, parasites, PREDATORS and competitors of the organism with which they interact constantly.

Discussion

1737.	Question : What is the basic principle of vaccination ? How do vaccines prevent microbial infections ? Name the organism from which hepatitis B Vaccine is produced.
Answer» Solution :The PRINCIPLE of vaccination is based on the property of .MEMORY. of the immune system . In vaccination, a preparation of antigenic proteins of pathogens or inactivated/live but weakened pathogens is introduced into the BODY. The antigens generate the primary immune RESPONSE by producing antibodies. The vaccines also generate the memory B-cells and T-cells. When the vaccinated person is attacked by the same pathogens, the existing memory B-cells or T-cells recognise the ANTIGEN quickly and overwhelm the invaders with massive production of lymphocytes and antibodies. Hepatitis B vaccine is produced from yeast.

Discussion

1738.	Question : What is the basic principle of tissue culture?
Answer» SOLUTION :TOTIPOTENCY

Discussion

1739.	Question : What is the backbone of any breeding programme?
Answer» EVALUATION and selection of parents Cross hybridisation AMONG the SELECTED parents Selection and testing of SUPERIOR recombinants Genetic variability Answer :D

Discussion

1740.	Question : What is the average life span of RBCs?
Answer» SOLUTION :RBCs have a LIFE SPAN of about 120 days.

Discussion

1741.	Question : What is the average life span of RBC ?
Answer» About 20 DAYS About 60 days About 80 days About 120 days Answer :D

Discussion

1742.	Question : What is the annual net primary productivity of whole biosphere?
Answer» SOLUTION :The annual NET primary productivity of the whole BIOSPHERE is APPROXIMATELY 170 billion tons (dry WEIGHT) of organic matter.

Discussion

1743.	Question : Whatis the animalsymbolof W.W.F(Worldwildifefund )
Answer» DOLPHIN KANGAROO Giant PANDA Greatindian Bustand Answer :d

Discussion

1744.	Question : What is the androecium called when stamens are arranged in one whorl and of different length ?
Answer» ANSWER :Heterodynamous

Discussion

1745.	Question : What is the Age of man :
Answer» Proterozoic Recent Mesozoic 100 years Answer :B

Discussion

1746.	Question : What is the aim of callus culture ?
Answer» COLLECTION of cytoplasm/protoplast Reduction in cell-biomass To CREATE GENETICALLY modified plant. To obtain plantlets of DORMANT seeds Solution :To create genetically modified plant.

Discussion

1747.	Question : What is the adventage of multiple cloning sites in vectors ?
Answer» Solution :Most of the commonly used cloning VECTORS have more than one restriction site . These are Multiple Cloning Site (MCS) or polylinker .PRESENCE of MCS facilitates USE of restriction enzyme of CHOICE .

Discussion

1748.	Question : What is the advantage of cleisotgamy?
Answer» more GENETIC variation more no. of offsprings No NEED for pollinators Placenta germination Answer :C

Discussion

1749.	Question : What is the actual number of genes found by HGP in the human genome?
Answer» Solution :SCIENTISTS have found out that the actual NUMBER of HUMAN genes may be 20,000 to 25,000.

Discussion

1750.	Question : What is the action of SAHELI ?
Answer» Antiestrogenic Antiprogesteronic Releasing PROGESTERONE PREVENTS implantation Relesing COPPER INHIBITS MOTILITY of sperms Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : What is the common name of Apis mellifera?

Question : What isthecommonpoint of similarity between DNA and RNA

Question : What is the common mode of asexual reproduction in chrysophytes?

Question : What is the common method of propagation in Bryophyllum?

Question : What is the circulating fluid in cockroach?

Question : What is the chemical process by which ammonia is seperated from amino acids?

Question : What is the chemical nature of biogas. Name an organism which is involved in biogas production?

Question : What is the chemical nature of biogas ? Name an organism which is involved in biogas production.

Question : What is the chemical name of common sugar.

Question : What is the chemical name of vitaminC?

Question : What is the characteristic feature that is observed in seral communities during different stages succession?

Question : What is the characteristic feature of humaninsulin ?

Question : What is the cause of Thalassemia?

Question : What is the cause of Thalassemia ?

Question : What is the cause of sickle-celled anemia?

Question : What is the cause of sickle-cell anaemia?

Question : What is the cause of low farm productivity per unit in India?

Question : What is the cause of Phenylketonuria. Explain the disorder.

Question : What is the cause of discontinuous synthesis of DNA on one of the parental strands of DNA ? What happens to these short stretches of synthesised DNA ?

Question : What is the cause of large holes in swiss cheese?

Question : What is the cause of diabetes insipidus? What is the symptom of it?

Question : What is the cause of altitude sickness at high altitudes?

Question : What is the cause of ADA deficiency?

Question : What is the cause of adenosine deaminase deficiency in humans?

Question : What is the capillary network enclosed by Bowman's capsules called?

Question : What is the capacity of urinary bladder?

Question : What is the called the organ transplantation of the organs of two different species ?

Question : What is the cancer that occurs in skin or lining of internal organs called ?

Question : What is the bundle of nerve fibre termed as ?

Question : What is the blueprint of humanity ?

Question : What is the biodiversity in reference to latitudinal gradient from higher latitude to lower latitude ?

Question :What is the biochemical reaction of yeast fermentation of molasses for alcoholic fermentation.

Question : What is the best solution for the treatment of electronic wastes ?

Question : What is the best pH the soil cultivation of plants:-

Question : What is the beginning of the menstrual cycle called?

Question : What is the basis of variations in the physical and chemical conditions of different habitats ?

Question : What is the basic principle of vaccination ? How do vaccines prevent microbial infections ? Name the organism from which hepatitis B Vaccine is produced.

Question : What is the basic principle of tissue culture?

Question : What is the backbone of any breeding programme?

Question : What is the average life span of RBCs?

Question : What is the average life span of RBC ?

Question : What is the annual net primary productivity of whole biosphere?

Question : Whatis the animalsymbolof W.W.F(Worldwildifefund )

Question : What is the androecium called when stamens are arranged in one whorl and of different length ?

Question : What is the Age of man :

Question : What is the aim of callus culture ?

Question : What is the adventage of multiple cloning sites in vectors ?

Question : What is the advantage of cleisotgamy?

Question : What is the actual number of genes found by HGP in the human genome?

Question : What is the action of SAHELI ?