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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.
| 2801. |
Question : What are the reasons for Mendel's successes in his breeding experiments? |
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Answer» Solution :`**` He applied mathematics and STATISTICAL methods to biology and laws of probability to his breeding experiments. `**` He followed scientific method and kept accurate and detailed records that include quantitative data of the OUTCOME of his crosses. `**` His experiments were CAREFULLY planned and be LARGE samples. `**` The pairs of contrasting characters which were controlled by factor ( genes) were present on separate chromosomes. `**` The parents selected by Medel were pure breed LINES and the purity was tested by self crossing the progeny for many generations. |
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| 2802. |
Question : What are the properties that a molecule must possess to act as genetic material? |
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Answer» SOLUTION :a) Self replication b) INFORMATION STORAGE c) STABILITY d) Variation through mutation |
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| 2803. |
Question : What are the proteins released by the cells to protect unattacked cells from viral infection called ? |
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| 2804. |
Question : What are the properties of Genetic material (DNA/RNA) ? |
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Answer» Solution :FOLLOWING are the CRITERIA that a molecule must fulfil to act as a genetic material : (1) It should be able to replicate itself. (ii) It should be stable both chemically and structurally. (iii) It should provide the scope for slow changes (mutation) which are required for evolution. (iv) It should be able to express itself in the form of .Mendelian Characters. According to these criteria, both DNA and RNA have the ability to direct their duplication (because of the rule of base pairing) and complementarity using SPECIFIC PROCESSES whereas the other molecules in the living SYSTEM fail to fulfil first criteria itself. eg. Protein. |
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| 2805. |
Question : What are the programmes listed under the maternity and child health and family planing. |
| Answer» SOLUTION :REFER to ARTICLE 4.2.1, PAGE I/169. | |
| 2806. |
Question : What are the projection of cortex of kidney between the renal pyramids called? |
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| 2807. |
Question : What are chasmogamous flower? Can cross pollination occur in cleistogamous flowers? Give reasons for your answer |
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Answer» Solution :In cleistogamous flowers, there are two types of pollination (Chasmogamy is seen) i.e. self pollination and cross pollination. (A) Self fertilisation- Autogamy: In this TYPE, pollination is achieved within the same flower. Transfer of pollen grains from the ANTHER to the stigma of the flower. This is seen in both chasmogamous and cleistogamous flowers. (B) Allogamy (Cross -Pollination) : Transfer of pollen grains from anther to the stigma of a different plant is called cross pollination. It is of two types. (i) Geltonogamy: Transfer of pollen grains from the stigma of another flower of the same plant. Although geitonogamy is functionally a cross pollination involving a POLLINATING agent genetically it is similar to autogamy since the pollen grains come from the same plant. (ii) XENOGAMY: Transfer of pollen grains from anther to the stigma of a different plant. This the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma 
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| 2808. |
Question : What are the products of cleavage in glycolysis ? |
| Answer» Solution :3-phosphoglyceraldehyde (3-PGAL) and DIHYDROXY ACETONE phosphate (DHAP) are the PRODUCTS of CLEAVAGE in GLYCOLYSIS. | |
| 2809. |
Question : What are the probable factors that contributed to population explosion in India ? |
| Answer» Solution : In INDIA the reasons / causes for population explosion are as follow : (i) Ignorance and lack of TOTAL AWARENESS, mainly it is responsible for population explosion in India. (ii) Prevent and ignorance. (iii) Social blot for female child and hope for male child. (IV) Decline in death rate. (v) Decline in death rate of mother and child. (vi) An increase in number of people in reproductive age. | |
| 2813. |
Question : What are the physical barriers of a cell in the protoplast fusion experiment? How are the barriers overcome ? |
| Answer» Solution :CELL WALL is the most IMPORTANT PHYSICAL barrier in such experiments. This can be OVERCOME by treatment with enzymes like cellulase and pectinase which have the ability to digest the cell wall and releases the naked protoplast surrounded only by the dell membrane.. | |
| 2814. |
Question : What are the pathogens that attack insects ? |
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| 2815. |
Question : What are the parts of the brain stem? |
| Answer» SOLUTION :Pons and MEDULLA are the PARTS of the brain stem. | |
| 2816. |
Question : What are the organs which were well developed and functional in the ancestor but are reduced and non-functional at present known as? |
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| 2817. |
Question : What are the organs of similar function but of different pattern of origin and development called? |
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| 2818. |
Question : What are the organisms that feed on plant sap and other plant parts called ? |
| Answer» SOLUTION :The ORGANISMS which feeds on plant sap are called as PHYTOPHAGOUS organisms. | |
| 2819. |
Question : What are the organs having similar origin and development but different in function called? |
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| 2821. |
Question : What are the optimal conditions that favours the induction of callus from nutrient medium? |
| Answer» Solution :After the inoculation of explant in the nutrient medium supplemented with AUXINS and INCUBATED at `25^(@)Cpm2^(@)C` in an alternate light and dark period of 12 HOURS with light intensity of 1000 lux, induces CELL division leading to the development of callus from the surface of explant. | |
| 2822. |
Question : What are the observations one can make from the study of population? |
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Answer» SOLUTION :(a) The OUTCOME of competition with ANOTHER species. (b) The IMPACT of a Predator or the effect of a pesticide APPLICATION. |
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| 2823. |
Question : what are the objectives of Biofortification? |
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Answer» Solution :To IMPROVE: 1. PROTEIN content and QUALITY 2. oil content and quality 3. Vitamin content 4. MICRO NUTRIENT and mineral content |
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| 2824. |
Question : What are the notable marks of oral cancer? |
| Answer» Solution :WHITE patches OCCUR inside the mouth. White SPOTS are seen on the TONGUE. There is ulceration in the mouth which MAY not heal. | |
| 2825. |
Question : What are the nerves arising from the brain of vertebrates called ? |
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| 2827. |
Question : What are the muscles that close apertures called ? |
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| 2828. |
Question : What are the morphological and chemical defence of plants against phytophagous insect? |
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Answer» Solution :1. Thorns in acacia and cactus. 2. STORE chemicals that make them sick when they are EATEN, inhibit feeding or digestion, disrupts its reproduction or even kill. Weed calotropis: They produce highly poisounous cardiac glycosides. Nicotine, CAFFEINE, quinine, strychnine, opium are the other chemicals, which produce plant defence agianst GRAZERS and browsers. |
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| 2830. |
Question : What are the major ecosystem services provided by the forest? |
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Answer» Solution :(i) Healthy forest ecosystems purify air and water (ii) MITIGATES DROUGHT and floods (iii) Cycle nutrients (iv) Generates fertile SOIL (v) provides wild life habitat (vi) Maintains biodiversity (vii) Pollinates crops (viii) Provides STRORAGE site of carbon It provides aesthetic, CULTURAL and spiritual values |
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| 2831. |
Question : What are the milk products obtained through the dairy practices? |
| Answer» Solution :MILK PRODUCTS obtained through the dairy practices are curd, cream, butter, GHEE, condensed milk, khoa, CHEESE, ETC. | |
| 2832. |
Question : What are the meanings of arthralgia and hepatomegaly? |
| Answer» SOLUTION :Arthralgia means JOINT PLAINS while HEPATOMEGALY is ENLARGED liver. | |
| 2833. |
Question : What are the materials used to grow microorganism like Spirulina? |
| Answer» Solution :SPIRULINA can be grown EASILY on materials like waste WATER from POTATO processing plants (containing starch) , straw , molasses , animal , manure and even sewage , to produce large quantities. | |
| 2834. |
Question : Major source of air pollution is |
| Answer» Solution :Particulate MATTERS and TOXIC gases are the major sources of AIR POLLUTION. | |
| 2835. |
Question : Listthe postfertilizationchangesin a flower . |
| Answer» SOLUTION :ENDOSPERM development , embryo development , SEED FORMATION and fruit formation. | |
| 2836. |
Question : What are the major functions of male accessory ducts and glands? |
| Answer» SOLUTION :Accessory ducts such as vasa EFFERENTIA, epididymis and vas deferens provide a PASSAGE for the sperm. The secretion of PROSTATE gland activates the swimming movement of the sperm. The secretion of seminal vesicle provides ENERGY for the movement of the sperm. Moreover the secretions of accessory glands provide a fluid medium for transportation, nutrients and also provide an alkaline medium to counteract the acidity of the uterus. | |
| 2837. |
Question : What are the major components of seminal plasma? |
| Answer» Solution :SECRETION of prostate GLAND, seminal vesicles and Cowper.s gland and SPERMS together constitute SEMEN. | |
| 2838. |
Question : What are the major causes of species losses in a geographical region ? |
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Answer» Solution :The major causes of species losses in a geographical region are (i) Habitat LOSS and fragmentation. (II) Over-exploitation of natural resources. (iii) Alien species inwasions can cause DECLINE or extinction of indigenous species. (iv) Co-extinction : When a species becomes EXTINCT, the plant and animal species associated with it in an obligatory way also become extinct. |
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| 2839. |
Question : What are the major causes of species losses in a geographical region? |
| Answer» SOLUTION :CAUSES of BIODIVERSITY LOSS. | |
| 2840. |
Question : What are the major activities carried out by forestry extension centres? |
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Answer» SOLUTION :• Training on TREE growing methods • Publicity and propaganda regarding tree growing • Formation of demonstration plots • Raising and supply of seedlings on subsidy • Awareness creation AMONG school children and youth about the IMPORTANCE of forests through training and camps. |
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| 2841. |
Question : Name the main sources of air pollution. |
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Answer» Solution :The main sources of air POLLUTION are: • Transport sources - cars, BUSES, airplanes, trucks and TRAINS. • Stationary sources - power plants, INCINERATORS, oil refineries, industrial facilities, and factories. • Area sources - agricultural - wood / STUBBLE burning and fireplaces. • Natural sources - wind-blown dust, wildfires and volcanoes. |
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| 2842. |
Question : What are the main gases responsible for the greenhouse effect? |
| Answer» SOLUTION :`CO_2`, METHANE, `N_2O` CHLORO Fluro CARBONS (CFCS). | |
| 2843. |
Question : What are the main factors that decide the density of a population? |
| Answer» Solution :The natality and MORTALITY of a population are the MAIN FACTORS that decide the density of a population. | |
| 2844. |
Question : What are the main featuresthat are required to facilitate cloning into a vector ? |
| Answer» SOLUTION :Origin or replication , SELECTABLE market, CLONING sites and vectors for cloning genes in PLANTS and ANIMALS . | |
| 2845. |
Question : What are the main features of climax community? |
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Answer» SOLUTION :Climax community is the stable community It contains all types of individuals It has complex food chain and food web HIGH nutrient CONSERVATION It has high efficiency of ENERGY use |
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| 2846. |
Question : What are the main causative factors which regulate the reproductive processes and related behavioural expressions in organisms ? |
| Answer» SOLUTION :INTERACTION between HORMONES and certain ENVIRONMENTAL factors. | |
| 2848. |
Question : What are the main cause of soil erosion in India ? |
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| 2849. |
Question : What are the main attributes of a population? |
| Answer» SOLUTION :BIRTH RATE, DEATH rate, Sex ratio and age distribution. | |