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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 17251. |
Question : Give reasons :Surgical sterilization is a permanent method of birth control . |
| Answer» Solution :Surgical sterilization is a PERMANENT method of BIRTH control as the surgical INTERVENTION BLOCKS the gamete transport and prevents pregnancy . | |
| 17252. |
Question : Give reasons Special kind of evolution has brought the similarity as seen in fins of fishes and flippers of dolphins. Name the kind of evolution also. |
| Answer» Solution :Convergent evolution has resulted in the SIMILARITY in fins of fishes and FLIPPERS of dolphins because these ORGANS are analogous structures. Though DIFFERENT in STRUCTURE and embryonic origin, they perform the same function in aquatic habitats. | |
| 17253. |
Question : Give reasons Placental wolf and Tasmanian wolf exist-sharing the same habitat. |
| Answer» SOLUTION :Placental wolf and tasmanian wolf exist sharing the same habitat in different continents, former in ASIA and the latter in Australia because these two show parallel evolution. They show INDEPENDENT development of similar characters in two ANIMAL GROUPS living in similar habitats of different continents. | |
| 17254. |
Question : Give reasons Hybrid seeds should be raised every year. |
| Answer» Solution :HYBRID CROP when grown for several generations looses gene combination for which they were selected Therefore, these need to be DEVELOPED EVERY YEAR. | |
| 17255. |
Question : Genetic code is 'universal. Give reason. |
| Answer» Solution :The genetic CODE is universal. It means that all known living systems use nucleic ACIDS and the same three base codons (triplet codon) direct the synthesis of protein from amino acids. For example, the mRNA (UUU) codon codes for phenylalanine in all cells of all organisms. Some exceptions are reported in prokaryotic, mitochondrial and chloroplast genomes. HOWEVER SIMILARITIES are more common than differences. | |
| 17256. |
Question : Suppose during your field visit for collection from a rocky sea shore you have got some live specimens such as sea urchin, sea cucumber, sea anemone. Is it possible to keep them on an aquarium in your school. Give reasons for your answer. |
| Answer» Solution :Cleistogamous flowers REMAIN CLOSED and ANTHERS, STIGMA are not exposed, therefore cross pollination cannot occur in them. | |
| 17257. |
Question : Give reasons for the following statements.Today there is no abiotic origin of a new life. |
| Answer» Solution :The presence of FREE `O_2` on earth PREVENTS any ABIOTIC orgins. | |
| 17258. |
Question : Give reasons for the following statements. Homo erectus erectus is called 'Java man' |
| Answer» SOLUTION :The fossil of Homo erectus was FIRST DISCOVERED from the banks of solo RIVER of JAVA. | |
| 17259. |
Question : Give Reasons for the following statements Marriage between blood relatives or cousins should not be performed. |
| Answer» Solution :Because, CHANCE of TRANSMISSION of defective GENE INCREASES. | |
| 17260. |
Question : Give Reasons for the following statements Drosophila is the ideal material for genetic study. |
| Answer» SOLUTION :Because it COMPLETES its LIFECYCLE about 2 WEEKS. | |
| 17261. |
Question : Give reasons for the following: Compared to internal fertilization, external fertilization is disadvantageous to the animal. |
| Answer» Solution :In EXTERNAL fertilization, the offsprings are extremely VULNERABLE to predators THREATENING their SURVIVAL UPTO adulthood. | |
| 17262. |
Question : Give reasons for the following: Chances of survival of young ones are more in viviparous animals than in oviparous animals. |
| Answer» SOLUTION :In oviparous animals because of proper embryonic care and PROTECTION, the chances of SURVIVAL of young ONES is GREATER. | |
| 17263. |
Question : Give reasons for the following: (a) Some organisms like honey bees are called parthenogenic animals (b) A male honey bee has 16 chromosomes whereas its female has 32 chromosomes |
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Answer» Solution :(a) Among honey bees, the queen bee and worker bees develop from fertilized eggs whereas the drones develop from unfertilized eggs. Hence the honey bees are PARTHENOGENETIC animals showing incomplete parthenogenesis. (b) Female honey bees (Queen or worker bees ) are diploid having 32 chromosomes since they develop from the fertilized egg. On the other hand, the MALE honey bees (drones) develop from unfertilized egg possessing only 16 chromosomes (I.e., HAPLOID) |
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| 17264. |
Question : Give reasons for the following. a. Frog tadpole excretes ammonia, adult frog excreles urea. b. The chemical composition of DNA in almost all animals is similar. c. For energy production all animals depend upon glycolysis and Kreb’s cycle d. Connecting links play an important role in understanding the concept of organic evolution. e. Change in germ cells is heritable. f. Genetic drift is also known as bottle neck phenomenon. |
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Answer» Solution :a. Excretion of ammonia needs more water. Urea needs only a little water for excretion. B. Supposed to have common ancestor. c. Common ancestry. d. These ANIMALS have the characters of both aves and reptiles. e. The information in the germ cells are only transferred to the NEXT generation whereas in the somatic cells it is not. f. Reduction in GENE frequencies. |
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| 17265. |
Question : Give reasons for success of Mendel. |
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Answer» Solution :(i) He used large samples for his experiments. (ii) He selected only PURE breeding VARIETIES. (iii) He choose the CHARACTER which had distinctive contrasts. (iv) He selected PEA plant which can be cross-bred as WELL as self bred. (v) Use of statistical methods and law of probability. |
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| 17266. |
Question : Give reasons: Ground nut seeds and castor seeds are dicot seeds. But ground nut seeds are ex-albuminous and castor seeds are albuminous. |
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Answer» Solution :( C ) In ground NUT, the developing embryo utilizes the endosperm completely. There is no residual endosperm in the seed. So the seed is ex-albuminous. In castor, the endosperm is not completely used by the developing embryo, there is some AMOUNT of endosperm left in the SEEDS and the seeds are albuminous. |
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| 17267. |
Question : Give reasons: The process of fertilization in angiosperm is double fertilization. |
| Answer» Solution :(b ) During fertilization two TYPES of fusion takes place in the embryo sac of ovule i.e., syngamy and triple fusion. One male gamete FUSES with egg and FORMS zygote, i.e., called syngamy. Second male gamete fuses with two POLAR nuclei in the CENTRAL cell and forms primary endosperm nucleus and endosperm, i.e., called triple fusion. | |
| 17268. |
Question : Give reasons as to why cell division cannot be a type of reproduction in multicellular organisms. |
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Answer» SOLUTION :In unicellular animals, cell division is the MEANS of reproduction to increase their number while, in case of multicellular organisms, they have well developed reproductive organs which help in reproduction. Their whole body does not PARTICIPATE in reproduction LIKE unicellular organisms. |
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| 17269. |
Question : Give reasons: Pollen tablets are in use by people these days. |
| Answer» Solution :(a ) POLLEN grains are rich in NUTRIENTS and HENCE are used in the form of TABLETS as FOOD supplement. | |
| 17270. |
Question : Give reasons: a) Plasmids are suitable for use as a vehicle DNA. B) Restriction endonucleases are used in genetic engineering. C) Recombinant DNA is formed of DNA from two sources. |
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Answer» Solution :a) Plasmids are separate from the main genome and can be easily isolated and introduced. b) RESTRICTION endonucleases cut the DNAs from different sources in such a way as to produce single stranded free ends (STICKY ends) that can UNDERGO complementary pairing to form a recombinant DNA. C) Recombinant DNA technology involves transfer of a DNA fragment from donor ORGANISM to the DNA molecule of recipient. |
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| 17271. |
Question : Give reason : Progesterone is called pregnancy hormone. |
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Answer» Solution :(1) Progesterone which is secreted from the corpus LUTEUM after ovulation, has the capacity to maintain PREGNANCY. It acts on uterine endometrium and causes it to proliferate and develop in thickness. (2) Corpus luteum KEEPS on secreting progesterone till the placenta takes up the function of secreting the same. (3) Due to progesterone, pregnancy is retained and hence it is called pregnancy hormone. In the absence of progesterone abortion takes PLACE. Therefore, progesterone is called pregnancy hormone. |
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| 17272. |
Question : Give reason - Haemophilia is called 'Bleeder's disease. |
| Answer» SOLUTION :Because in the people suffering from haemophilia there is CONTINUOUS loss of blood due to ABSENCE of DOTTING factors. | |
| 17273. |
Question : Give reason - Genetic code is universal. |
| Answer» Solution :GENETIC code is universal. E.g. From BACTERIA to human UUU CODES for Phenylalanine. Someexceptions are FOUND in mitochondrial CODONS, and in some protozoans. | |
| 17274. |
Question : Give reason - Genetic code is degenerate. |
| Answer» SOLUTION :More than ONE triplet CODON recognizers the same amino acid. | |
| 17275. |
Question : Give reason for the following: The second half of the menstrual cycle is called lyteal phase as well as secretory phase. |
| Answer» Solution :During this phase, Corpus luteum is fully FORMED and SECRETES large quantity of PROGESTRONE. | |
| 17276. |
Question : Give reason for the following: The first half of the menstrual cycle is called follicular phase as well as proliferative phase. |
| Answer» SOLUTION :During this phase, PRIMARY follicles transform into Graafian FOLLICLE under FSH stimulation. Graafian follicles SECRETE Estrogens with stimulate ENLARGEMENT of Endometrum of uterus. | |
| 17277. |
Question : Give reason: Hybrid seeds have to be produced year after year. |
| Answer» SOLUTION :(d ) The plants grown from the hybrid seeds show SEGREGATION of traits and do not MAINTAIN the hybrid characters, so hybrid seeds have to be PRODUCED every year. | |
| 17278. |
Question : Give reason . (a) Flavour in Yogurt (b) Large holes in Swiss Cheese |
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Answer» Solution :(a) The flavour in yogurt is due to acetaldehyde formation. (B) Large HOLES in SWISS Cheese is due to more `CO_(2)` production by PROPIONIBACTERIUM shermanii. |
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| 17279. |
Question : Give products of pollen grain and their uses |
Answer» Solution :Pollen grains are rich in nutrients. It has BECOME a fashion in recent years to use pollen tablets as food SUPPLEMENTS. In western countries a large NUMBER of pollen products in the form of tablets and syrups are available in the market. Pollen consumption has been claimed to INCREAE the performance of athletes and race HORSES. 
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| 17280. |
Question : Give one word for the following.a. Genes that are constantly requires for cellular activities.b. Sequences of nitrogen bases in mRNA containing the information forprotein synthesis. c. Transcription of DNA from RNAd. A segment of DNAe. Synthesis of DNA from pre-existing DNA.f. Small genetic unit that can mutate |
| Answer» SOLUTION :a. House KEEPING GENE b. Genetic code C. Reverse transcription d. Gene e. Replicationf. MUTON | |
| 17281. |
Question : Give one word for the following.a. Carbon copies of a single parentb. Vehicle used to carry gene from one cell to another.c. Plants or animals produced by incorporating desired genes into theirgenotype. d. Technology involves the production of hybrid DNA. e. Treatment of disease using genesf. Storehouse of DNA fragments, genes, spores, frozen sperms etc. |
| Answer» Solution :a. CLONE B. Vectorc. Transgenicsd. RECOMBINANT DNA technology E. Gcnc therapyf. Gene bank | |
| 17282. |
Question : Give one similarity and one difference between protocooperation and mutualism |
| Answer» Solution : In both the PHENOMENA, the TWO PARTICIPATING species are BENEFITTED but obligatory in mutualism and can survive SEPARATELY in protocooperation. | |
| 17283. |
Question : Give one significant difference between Electroporation and Gene Gun |
| Answer» SOLUTION :EUROPEAN FEDERATION of BIOTECHNOLOGY | |
| 17284. |
Question : Give one significant contribution of Sanger |
| Answer» SOLUTION :Sangar DISCOVERED the STRUCTURE of INSULIN MOLECULE. | |
| 17285. |
Question : Give one significant contribution of Wallace. |
| Answer» SOLUTION :WALLACE along with CHARLES Darwin gave Theory of NATURAL Selection. | |
| 17286. |
Question :Give one significant contribution of G. Gamow. |
| Answer» SOLUTION :G. GAMOW DEVELOPED Triplet GENETIC Code . | |
| 17287. |
Question : Give one significant contribution of each of the following scientists: Wallace R. Mishra G. Gamow Sanger |
| Answer» Solution :(i) Wallace ALONG with Charles Darwin gave Theory of Natural Selection. (II) R. Mishra contributed in the field of Ecology and is called Father of INDIAN Ecology. (iii) G. Gamow developed triplet Genetic code.(iv) Sangar DISCOVERED the structure of insulin molecule. | |
| 17288. |
Question : Give one significant contribution Mishra |
| Answer» Solution :R. Mishra CONTRIBUTED in the FIELD of Ecology and is called FATHER of INDIAN Ecology. | |
| 17289. |
Question : Give one point of distinction between population and community. |
| Answer» SOLUTION :Population is the group of individuals belonging to the same species within an ECOSYSTEM while community is the group of individuals belonging to different species from the same ecosystem living and INTERACTING TOGETHER. | |
| 17290. |
Question : Give one peculiar feature of leukaemia. |
| Answer» SOLUTION :ABNORMAL INCREASE in blood CORPUSCLES especially lymphocytes. | |
| 17292. |
Question : Give one example of the following Sex-linked recessive disease |
| Answer» SOLUTION :HAEMOPHILIA | |
| 17293. |
Question : Give one example of the following Inborn error in metabolism |
| Answer» SOLUTION :PHENYLKETONURIA | |
| 17294. |
Question : Give one example of the following Autosome-linked recessive desease |
| Answer» SOLUTION :Sickle-cell ANAEMIA | |
| 17295. |
Question : Give one example of quaternary protein. |
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Answer» |
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| 17296. |
Question : Give one example of organism exhibitingfemale heterogamety. |
| Answer» SOLUTION :BIRDS SHOW FEMALE heterogamety. | |
| 17297. |
Question : Give one example of pesticide of microbial origin |
| Answer» SOLUTION :THURIOSIDE | |
| 17299. |
Question : Give one example of green manure |
| Answer» SOLUTION :CROTALARIA JUNCEA | |
| 17300. |
Question : Give one example of bioinsecticide |
| Answer» SOLUTION :PHEROMONES | |