InterviewSolution
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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.
| 401. |
Question : What is the difference between Botanical Garden and Herbarium ? |
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Answer» Solution :BOTANICAL Garden : COLLECTION of living plants. Herbarium : Collection of dried, pressed and prerserved plant SPECIMENS onsheets. |
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| 402. |
Question : What is the difference between a genemutation and a chromosomal mutation? |
| Answer» SOLUTION :`{:("S.No","Gene","Chromosomal mutation"),(1.,"A CHANGE in the nucleotide SEQUENCE, in a particular gene","A change in several genes in the chromosome"),(2.,"Gene mutation is only a structural alteration","Chromosomal mutation are either NUMERICAL or structural changes in the entire DNA strand"):}` | |
| 403. |
Question : What is the default colour of the stage? |
| Answer» SOLUTION :white | |
| 404. |
Question : What is the contribution of Mendel to genetics? |
| Answer» Solution :Mendel OBSERVED the OCCURRENCE of contrasting characters of GARDEN PEA in various generations. On this basis, he interpreted that these contrasting characters are controlled by factors. He considered each and EVERY character as a unit, which is controlled by a .factor.. Factors are carriers of hereditary information. Now, factors are known as genes. | |
| 405. |
Question : What is the composition of plasma membrane of human erythrocyte. |
| Answer» SOLUTION :`52%` PROTEINS, `40%` LIPIDS. | |
| 406. |
Question : What is the composition of Bio-gas? How is it formed? |
| Answer» SOLUTION :Bio-GAS is the MIXTURE of methane (75%), HYDROGEN sulphide, carbon dioxide and hydrogen. It is produced by the decomposition of animal wastes (cow dung) and plant wastes in the absence of oxygen. It is also commonly called as “Gobar gas”, as the starting MATERIAL used is cow dung, which means gobar in hindi. | |
| 407. |
Question : What is the common step in aerobic and anaerobic pathway ? |
| Answer» SOLUTION :GLYCOLYSIS is the common step in AEROBIC and ANAEROBIC pathway. | |
| 408. |
Question : What is the command used to create a new project? |
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Answer» FILE`to` NEW |
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| 409. |
Question : What is the cause of sickle-cell anaemia ? |
| Answer» Solution :Gene MUTATION which changes the composition of HAEMOGLOBIN and shapes of RBCS. | |
| 410. |
Question : What is the benefit of Rabbit? |
| Answer» SOLUTION :RABBIT meat is white meat of high quality, EASILY DIGESTIBLE with LOW fat, low cholesterol and high protein compared to most other meats. It is an excellent source of vitamins `B_(3)` and `B_(12)`, minerals, and trace elements (Phosphorus, Potassium and Selenium) Rabbit meat is an excellent balance of fatty acids, Omega 3 than chicken or pork. | |
| 411. |
Question : What is the basis of modern taxonomical studies ? |
| Answer» SOLUTION :External and INTERNAL STRUCTURE, structure of cell, development PROCESS and ECOLOGICAL information. | |
| 412. |
Question : What is the autotrophic nutrition ? |
| Answer» Solution :It is the process in which ORGANISMS prepare the food NEEDED for their survival . This is FOUND in GREEN plants and some bacteria. | |
| 414. |
Question : What is the aim of crop improvement? |
| Answer» SOLUTION :The aim of CROP improvement is to develop IMPROVED crop varieties possessing higher yield. better quality, resistance to diseases and shorter duration | |
| 415. |
Question : What is the age of the sun ? What will be its expected lifespan ? |
| Answer» SOLUTION :The sun is 5 billion YEARS OLD and another 5 billion years will its expected lifespan. | |
| 416. |
Question : What is the advantage of one over the other and why? |
| Answer» Solution :Ground water is more ADVANTAGEOUS than pond water because it does not evaporate does not EASILY contaminate by pollutants and SPREADS to LARGE AREAS for recharging wells. | |
| 417. |
Question : What is Terminus? |
| Answer» SOLUTION :The replication fork of DNA, of the two SIDES meet at a SITE called terminus. | |
| 418. |
Question : What is ten per cent law ? Explain with an example how energy flows through different trophic levels. |
Answer» SOLUTION :Energy available at each SUCCESSIVE trophic level of food chain is ten per cent of that at the previous level. This is CALLED ten per cent law. Thus, 90 per cent energy is lost to the surroundings at each trophic level. However, plants absorb only one per cent of radiant energy of the Sun during PHOTOSYNTHESIS. This is EXPLAINED as under : 
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| 419. |
Question : What is systematics ? |
| Answer» Solution :SYSTEMATIC ARRANGEMENT which also takes into account EVOLUTIONARY RELATIONSHIPS between organisms. | |
| 420. |
Question : What is systemic circulation ? |
| Answer» SOLUTION :The kind of BLOOD CIRCULATION that is concerned with the supply of oxygenated blood from the LEFT ventrice to all body parts and return of oxygenated blood to the RIGHT atrium of heart. | |
| 421. |
Question : What is syngamy? |
| Answer» SOLUTION :ONE male nucleus fuses with one female gamete or egg. This PROCESS of fusion of male and female nuclei is CALLED SYNGAMY. | |
| 422. |
Question :Explain the Synaptic transmission. |
| Answer» Solution :The flow of NERVE impulses from axonal end of ONE neuron to dendrite of ANOTHER neuron through a synapse is called synaptic transmission. | |
| 423. |
Question :Whatis synapse ? Name its two types. |
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Answer» Solution :JUNCTION between two nerves CHEMICAL synapse and ELECTRICAL synapse |
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| 425. |
Question : What is sustainable development ? How is it useful in natural resource management? |
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Answer» Solution :Sustainable development : When we use the environment in WAYS that ensure we have resources for the future, it is CALLED sustainable development. Useful in NATURAL resource management : 1) Sustainable development ensures the judicial management of natural resources. 2) It helps in optimumutilization of alternative resources and renewable resources. 3) Thus it helps in decreasing the ever INCREASING demand for fossil fuels and non-renewable resources. 4) Sustainable development practices will give more scope for planning new methods of natural resource management. |
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| 426. |
Question : What is succus entericus ? |
| Answer» SOLUTION :JUICE secreted by GLANDS present in intestinal wall is known as succus ENTERICUS. It CONTAINS digestive enzymes. | |
| 427. |
Question : What is stroke volume ? What is its relation with cardiac output ? |
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Answer» SOLUTION :During one cardiac CYCLE or one HEART beat the volume of blood pumped by the heart is called stroke volume. This is normally 70 mL. In one minute the heart beats about 72 times and the amount of blood pumped per minute is called cardiac output. This is usually 4900 mL. or 5 LITRES. |
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| 428. |
Question : What is Sprite? |
| Answer» Solution :The CHARACTERS on the background of a Scratch WINDOW are known as Sprite. Usually ACAT appears as a sprite when the Scratch window is opened. The software provides facilities to MAKE alternations in sprite. | |
| 429. |
Question : What is Stage ? |
| Answer» Solution :STAGE is the background APPEARING when we open the scratch window. The background will most often be white. You can change the background COLOUR as you LIKE. | |
| 430. |
Question : What is Spinal Reflexes? |
| Answer» Solution :Most of the REFLEX actions are monitored and CONTROLLED by the spinal CORD. So it is called Spinal REFLEXES. | |
| 431. |
Question : Theinstruments used to measure bloodpressure is |
| Answer» Solution :Sphygmomanometer is a CLINICAL INSTRUMENT used to measure blood pressure, when a person is in a relaxed and resting condition. The pressure of the brachial artery is MEASURED. It HELPS to estimate the state of blood circulation and the working of the heart. It helps to DIAGNOSE conditions such as increased or decreased blood pressure. Monometric and modern digital types are used to measure blood pressure. | |
| 432. |
Question : What is speciation? List four factors that could lead to speciation. Which of these cannot be a major factor in the speciation of a self-pollinating plant species? Explain. Give reason to justify your answer. |
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Answer» Solution :SPECIATION is the formation of NEW species from the pre-existing population. Factors responsible for speciation: (i) Genetic dritt (ii) Natural selection (iii) GEOGRAPHICAL isolation (IV) Mutation Geographical isolation cannot be a major factor in the speciation of a SELF pollinating plant species because physical barrier cannot be created in self-pollinating plants. |
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| 433. |
Question : What is speciation List four factors responsible for speciation. |
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Answer» SOLUTION :Speciation is the formation of new SPECIES from the pre-existing population . Factors responsible for speciation: (i) Genetic drift (ii) Natural selection (III) Geographical ISOLATION(iv) Mutation |
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| 434. |
Question : What is speciation ? Explain how speciation occurs. |
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Answer» Solution :The bushes on which beetles feed are widely spread over a mountain range and over a period of time beetles population becomes very large. In the large beetle population, individual beetles normally do not travel FAR. Instead they continue to feed on few nearby bushes only throughout their life-time. In the large beetle population, there will be sub-populations in neighbourhoods. Most reproduction will be within these sub-populations. Occasionally adventurous beetle might go from one sub-population to another or a beetle is picked up by a crow from one SITE and dropped in the other site, without being eaten. In either case, the migrant beetle gets an opportunity to breed with the local member of sub-population. As a result, genes of migrant beetle enter into the local sub-population. Such kind of gene flow happens between sub-populations that are only partly separated. If a large river separates two sub-populations of a beetle then there will be further isolation, resulting in minimum level of gene flow between them. (2) Genetic drift and NATURAL selection : Genetic drift will accumulate different changes in each sub-population over generations. Natural selection may also operate differently in different geographic locations. For example, in the territory of one sub- population crows are eliminated by eagles. As a result, the green variation in beetles will not be selected, the RED beetles continued to reproduce. But in other sub-population, crow numbers are very high and not eliminated by eagles. So, here green variation will be strongly selected. Together, the process of genetic drift and natural selection will result in these two isolated sub-populations of beetles becoming more and more different from each other. (3) Reproductive isolation : Members of two groups will be incapable of reproducing with each other even if they happen to meet. This can be happen by a number of ways. `rarr` SEVERE changes in DNA or change in the number of chromosomes, eventually the germ cells of two groups cannot fuse with each other. `rarr` e.g., A new variation emerges in which green females will not mate with red males of beetles. If a green female beetle meets a red male from the other group, her behaviour will ensure that there is no breeding between them. This is how speciation occurs and effectively, new species of beetles are generated. |
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| 435. |
Question : What is speciation? Explain in brief the role of natural selection and genetic drift in this process. |
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Answer» Solution :Speciation : Origin of new species from pre- existing ones. Role of Genetic drift and natural selection : Genetic drift is FLOW of genes from ONE POPULATION to another by CHANCE factor or randomly. Over generation it will accumulate different changes in different population. In addition, natural selection operates differently in different population selecting the fittest/ favourable FEATURE in both the population. Over a long period of time the differences in the two population may become so drastic that they no longer reproduce with each other and thus give rise to new species. |
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| 436. |
Question : What is Smog? State its affects? |
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Answer» Solution :(i) SMOKE and fog TOGATHER are CALLED SMOG. (ii) It affects visibility and causes road ACCIDENTS. |
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| 437. |
Question : What issinglecirculation? |
| Answer» SOLUTION :In fishes, amphibians and certain REPTILES, the oxygenated and DEOXYGENATED blood are mixed and pass through the heart only once, is called Single Circulation. | |
| 438. |
Question : What is simple or basic reflexes? Give a few action, as examples. |
| Answer» Solution :These SIMPLE REFLEXES are INBUILT and unlearned RESPONSES. Many of the actions we perform in our day to day life are simple reflexes. Eg. Winking of EYES, Sneezing, Coughing and Yawing. We perform these actions without thinking. | |
| 439. |
Question : What is sexual reproduction List its four significances. |
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Answer» Solution :Two major processes namely FORMATION of gametes and fusion of gametes constitute sexual reproduction. Its significances are: (i) Incorporates the process of combining DNA from two different individuals during reproduction. (ii) Increases GENETIC variation. (iii) PROMOTES diversity in the offsprings. (iv) Plays a role in the origin of new species. |
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| 440. |
Question : What is shown in the following figure? |
| Answer» Solution :The FIGURE shows the evolution of WILD CABBAGE. | |
| 441. |
Question : What is sickle cell anaemia? |
| Answer» Solution :Sickle CELL anaemia is caused by the mutation of a single gene. This ALTERATION in gene brings a change in the structure of PROTEIN part of Haemoglobin molecule. The red blood cells, that carries the haemoglobin in sickle SHAPED and oxygen carrying capacity reduces, CAUSING sickle cell anaemia. | |
| 442. |
Question : What is short circuit ? State one condition that leads to it . Name the device in the household that acts as a safety measure for it. |
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Answer» SOLUTION :When live wire and neutral wire come in direct contact, a heavy CURRENT in the CIRCUIT is called short circuiting. Factor : Insulation of wire is damaged. Safety device :Electric FUSE. |
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| 443. |
Question : What is sex determination? State the different methods of sex determination in animals. |
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Answer» Solution :The unisexual organism is either a male or a female. The mechanism by which the sex of an individual is determined is called sex determination. The organism that develops from the fertilised EGG (zygote) may be a male or a female offspring. Methods of sex determination in animals : Different species of animals utilize different methods for their sex determination. e.g., ( 1) In a few reptiles, the sex determination is DEPENDENT on the environmental factor, i.e., temperature. The egg (zygote) may develop into a male turtle or a female turtle, is determined by temperature. When a temperature is over `30^(@)C`, the eggs of turtle, develop into female. The eggs of crocodiles EXPOSED to the high temperature INDUCE the development of male whereas the lower temperature induces the development of female crocodiles. ( 2 ) In human beings the sex of the individual is determined by sex chromosomes and is thus genetically determined. The genes inherited from parents decide the sex of the offspring. Exception : The animal such as certain snail can change its sex. The sex therein, is not genetically determined. |
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| 444. |
Question :What is self sterility mechanism in flowers which allows only cross-pollination? |
| Answer» Solution :In SELF STERILITY, pollen grains of the same flower are not capable to FERTILISE that flower, e.g., potato, TOBACCO, tea, etc. Hence, cross-pollination is the rule applied. | |
| 445. |
Question : What is Scratch? |
| Answer» Solution :Scratch. is a software USED to create animations, cartoons and GAMES easily. Scratch, on the other hand, is a visual programming language. It was developed in the Massachusetts Institute of TECHNOLOGY (MIT) Media Lab to make programming EASIER and more fun to learn. | |
| 446. |
Question : What is Root Pressure? |
| Answer» Solution :As ION from the Soil are ACTIVELY transported into the Vascular TISSUE of the root, WATER moves along and increases the PRESSURE inside the Xylem. This pressure is called root pressure. | |
| 447. |
Question : What is the role of seminal vesicles and the prostate gland? |
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Answer» SOLUTION :Seminal vesicles are a pair of lobulated glands that produce 60-70% of semen plasma which CONSIST of fructose, proteins and other chemicals for nourishing and stimulating SPERMS. Secretion of prostate gland is THICK, milky and ALKALINE. It contains chemicals essential for motility of sperms. |
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| 448. |
Question : What is Richmond Lang effect? |
| Answer» Solution :Application of CYTOKININ DELAYS the PROCESS of ageing in plants. This is CALLED Richmond Lang effect | |
| 449. |
Question : What is responsible for inbuilt tendency to variation ? |
| Answer» SOLUTION :(i) Errors in DNA COPYING and (i) Sexual reproduction, are responsible for INBUILT tendency to variation. | |
| 450. |
Question : What is respiratory quotient? |
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Answer» Solution :The RATIO of volume of carbon DIOXIDE LIBERATED and the volume of RESPIRATION is called Respiratory Quotient (R.Q) `R.Q = ("volume of "CO_2 " liberated")/("volume of " O_2 "CONSUMED")` |
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