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.
| 2651. |
Question : Molecular scissors refers to DNA ligases. |
| Answer» Solution :Correct statement: MOLECULAR scissors REFERS to RESTRICTION ENZYMES. | |
| 2652. |
Question : Mohan, Rohan and Sohan are three classmates. They have three different habits. Mohan is fond of taking bread and apple jam. Whenever all the jam of the container is eaten up by him, Mohan cleans the container thoroughly and puts iodised salt in it which his mother keeps on the kitchen rack. Rohan has a habit of putting old notebooks, newspapers and magazines at one place and sell it to Kabadiwala after a month to make some extra pocket money. Sohan has also a unique habit of going from room to room in his big house and switch off the lights and fans when no one is in the rooms. Actually, Mohan, Rohan and Sohan are collectively trying to practise three R's taught by their teacher in their own ways. (a) What is meant by three R's ? In which context are they used ? (b) Which of the three R's is exemplified by Mohan's action ? (c ) Which of the three R's is exemplified by Rohan's action ? (d) Which of the three R's is exemplified by Sohan's action ? (e) Why is the R exemplified by Mohan's action better than the R exemplified by Rohan's action ? (f) What values a displayed by Mohan, Rohan and Sohan in this episode ? |
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Answer» Solution :(a) The tree R's stand for Reduce, Recycle and Reuse. These are used in the context of natural resources. (b) Mohan reuses the emptyjam container for storing iodised salt, so the R exemplified by Mohan's action is 'Reuse'. (c ) Sohan SWITCHES old paper products such as old notebooks, newspapers and magazines to kabadiwala for being sent to paper mills for recycling (making new paper), so the R exemplified by Rohan's action is 'Recycle'. (d) Sohan switches off lights and FANS when not needed to avoid wastage of electricity and reduces the consumption of coal (which is usually used to PRODUCE electricity), so the R exemplified by Sohan's action is 'Reduce'. (E) We have just seen that Mohan practises 'reuse' and Rohan practises 'recycle'. The process of 'reuse' is better than that of recycling because though some energy is used to recycle old objects but no energy is required during reuse. (f) The values displayed by Mohan, Rohan and Sohan are: (i) Awareness (or knowledge) of 3 R's to save the environment, and (II) Ability to use their knowledge in everyday situations. |
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| 2653. |
Question : Mohan and Radha are husband and wife who live in a village. They are going to have their first baby. Mohan has blonde hair (paly yellow hair) with genotype hh whereas Radha has black hair with genotype HH. A discussion started between Mohan and Radha whether their baby would have blonde hair (pale yellow hair) like father or black hair like mother. Bikram is Mohan's nephew. He had come to meet his uncle (mama ji) Mohan in the village. Bikram, who is a science student of class 10 in a city school, was listening to their discussion. When Mohan and Radha could not come to a conclusion about the hair colour of their would-be baby, Bikram said that the baby would have black hair colour. He explained the reason for this to Mohan and Radha. (a) What are the factors which transmit characteristics (or traits) from the parents to their baby ? (b) Name the process through which these factors are transmitted from parents to their baby.(c ) Explain how Bikram could tell in advance that the baby to be born would have black hair colour like mother (and not blonde hair like father). (d) What values are exhibited by Bikram in this episode ? |
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Answer» Solution :(a) The characteristics (or traits) are transmitted from the parents to their baby through genes present on their sexchromosomes. (b) Sexual reproduction. (c ) (i) Mother's (Radha's) CELLS contain TWO dominant genes HH for BLACK hair, so she has black hair. (ii) Father's (Mohan's) cells contain two recessive genes hh for BLONDE hair, so he has blonde hair. (iii) Baby will get one dominant gene H for black hair (from mother) and one recessive gene h for blonde hair (from father), so its genotype will be Hh and phenotype will be black hair. (d) The values exhibited by Bikram in this episode are (i) Awareness (or knowledge) of the transmission of characteristics (or traits) from parents to progeny, and (ii) Application of knowledge in SOLVING real-life problems. |
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| 2654. |
Question : Modern Agricultural practices are activities came out to improve the plants. |
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| 2655. |
Question : Mode of nutrition in Paramecium is |
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Answer» holophytic |
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| 2656. |
Question : Mode of nutrition in CUSCUTA is : |
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Answer» AUTOTROPHIC |
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| 2657. |
Question : Mitochondria were first observed by |
| Answer» Solution :N/A | |
| 2658. |
Question : Mineralsin theplantsare notlostwhen theleaffalls . |
| Answer» Solution :MINERALS like Phosphorus, Sulphur, Nitrogen and Potassium are remobilised in the soil from OLDER DYING leaves to younger leaves. This phenomenon is seen in deciduous PLANTS. So minerals in the plants are not lost, when the leaf FALLS. | |
| 2659. |
Question : Mineralscannotbe passivelyabsorbedbythe roots . |
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Answer» Solution :The minerals cannot be PASSIVELY absorbed by the ROOTS because (a) The minerals are present in the soil as charged particles (ion) and cannot MOVE across the cell membrane. > (B) The concentration of minerals in the soil in LOWER than the concentration of minerals in the root. |
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| 2660. |
Question : Mineral ion associated with haemoglobin is |
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Answer» Cu |
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| 2661. |
Question : Minarnata disease is a pollution-related disease, which results from |
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Answer» release of human organic waste into drink- ing water |
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| 2662. |
Question : Minarnata and itai-itai are respectively caused by pollution of |
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Answer» MERCURY and LEAD |
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| 2663. |
Question : Minamata disease is a pollution-related disease, which results from |
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Answer» release of human ORGANIC waste into DRINK- ing water |
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| 2664. |
Question : Milky water of green coconut is |
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Answer» LIQUID of FEMALE gametophyte |
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| 2665. |
Question : Microtubule : Tubulin :: Microfilament: |
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Answer» Keratin |
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| 2666. |
Question : Method of asexual reproduction in spirogyra …………....a.division of a cell into two cellsb.breaking up of filaments into smaller bitsc.division of a cell into many cellsd.formation of a large number of buds |
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Answer» division of a cell into TWO cells |
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| 2667. |
Question : Metastasis is associated with |
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Answer» MALIGNANT tumour |
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| 2668. |
Question : Mention why is it not possible to make use of solar cells to meet all our energy needs ? State three reasons to support your answer. also mention three use of solar cell. |
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Answer» Solution :It is not possible to make use of solar cells to melt all our energy needs because, Limited availability of special grade semiconducting materials such as silicon and germanium Solar cell have lower efficiency as they depend entirely on intensity of solar radiation The process of manufacturing of solar cells is very expensive SILVER used for inter connection of cell in the panel further add to the cost. USES of solar cell :*They provide electric power to satellites and space PROBES. * They provide electric power to offshore drilling PLANTS from light houses. * The T.V relay stations located in remote area use solar panels to get electric power for wireless transmission. |
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| 2669. |
Question : Mention two modes of reproduction. |
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Answer» SOLUTION :(i) SEXUAL REPRODUCTION. (II) ASEXUAL reproduction |
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| 2670. |
Question : Mention the two functions of human testes. |
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Answer» Solution :a] They produce MALE germ CELLS i.e. sperms. b] They ACT as endocrine glands and secrete the hormone testosterone which controls secondary sexual CHARACTERS in males. |
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| 2671. |
Question : Mention three important features of fossils which help in the study of evolution. |
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Answer» SOLUTION :(a) Fossils REPRESENT modes of preservation of ancient SPECIES. (b) Fossils help in establishing evolutionary traits among organisms and their ANCESTORS. (c) Fossils help in establishing the time period in which organisms lived. |
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| 2672. |
Question : Mention three characteristics features of hormonal secretions in human beings. |
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Answer» Solution :Hormones are also known as CHEMICAL MESSENGERS as they act at a place different from the SITE of their manufacture. (ii) Their hyoper and hyposecretion may cause disroder. (iii) Their hylps in CONTROL an co-ordination of the activities of living organism. |
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| 2673. |
Question : Mention the stages of mitosis with the help of diagrams . Explain the changes that takes place in Prophase. |
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Answer» Solution :MITOSIS is a method of CELL division , in which the nucleus divides into two daughter nuclei each containing the same number of chromosomes as the parent nucleus . Mitosis takes place in all body cells which retains same number of chromosomes. Different stages of mitosis : (1) Prophase (2) Metaphase (3) Anaphase(4) Telophase  (1) Prophase : (i) In this phase chromosomes condense and get coiled . (ii)They become visible even in LIGHT microscope. (III) Nuvleoli becomes smaller. (iv)Choromosome split lengthwise to from chromatids , connected by centromeres. (v) Nuclear membrane breaks down. (vi) Centrosome containing rod like centrioles, DIVIDE and from ends of spindle . |
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| 2674. |
Question : Mention the significance of forests. |
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Answer» Solution :Significance of forests :( 1 ) Forests are most valuable resources. FOOD, fodder, FIBRES, TIMBER, fuel wood, medicines, gum, resins, lac, rubber, catechu, bamboo, etc. are obtained from forests. ( 2 ) Bamboos obtained from forests are mostly used to make slats for huts and baskets for STORING THINGS. (3) Forests provide habitat to numerous plants and animals. ( 4 ) Forests play a very important role in maintenance of environment. They playan important role in the maintenance of seasonal cycles, biochemical cycles, regularity of rainfall and conservation of soil. (5) Forests reduce impact of heavy rains and strong winds. They control erosion of soil and leaching. |
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| 2675. |
Question : Mention the part of the brain whichcontrols the involuntary actions like blood pressure, salvation etc. |
| Answer» SOLUTION :MEDULLA in the HIND BRAIN | |
| 2676. |
Question : Mention the part of the body where gustatory and olfactory receptors and located. |
| Answer» SOLUTION :TONGUE and NOSE. | |
| 2677. |
Question : Mention the name of two dams whose construction faced opposition |
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Answer» Solution :TWO dams whose construction faced OPPOSITION are : (1) Tehri Dam on the RIVER Ganga. (2) SARDAR SAROVAR Dam on the river Narmada. |
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| 2678. |
Question : Mention the major hazard of nuclear energy or nuclear power generation. |
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Answer» Solution : The major hazard of nuclear POWER generation is the storage and disposal of spent or used fuels - the uranium which KEEP on decaying into harmful subatomic particles (radiations). `rarr` IMPROPER nuclear waste storage and disposal results in environmental contamination. `rarr` There is a risk of accidental leakage of nuclear RADIATION. `rarr` Nuclear energy also used for DESTRUCTIVE purposes. i.e., nuclear weapons. |
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| 2679. |
Question : Mention the major events during photosynthesis. |
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Answer» Solution :The major events during photosynthesis are: (a) absorption of LIGHT energy by chlorophyll (b) CONVERSION of light energy to chemical energy (c) splitting of `H_(2)O`into `H_(2) , O_(2)` and energy (d) reduction of `CO_(2)`to CARBOHYDRATES |
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| 2680. |
Question : Mention the information source of making proteins in the cell. What is the basic event in reproduction ? |
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Answer» SOLUTION :DNA is the basic source of making proteins in the cells. The basic event in reproduction is the CREATION of a DNA copy. Cells use CHEMICAL reactions to build COPIES of their DNA. This creates two copies of the DNA in a reproducing cell, and they will need to be separated from each other. DNA copying occurs accompanied by the creationof an additional cellular apparatus. The DNA copies then separate, each having its own cellular apparatus for MAINTAINING life processes. |
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| 2681. |
Question : Mention the information source for making proteins in the cell. What is the basic event in reproduction? |
| Answer» Solution :The DNA in the nucleus of a cell is the information source for making proteins. If the information is changed, different proteins will be made. The basic event in REPRODUCTION is the creation of a DNA copy. Cells use CHEMICAL reactions to build COPIES of their DNA. This creates two copies of the DNA in a reproducing cell and they need to get separated from each other. DNA COPYING is accompanied by the creation of an ADDITIONAL cellular apparatus, and then the DNA copies separate, each with its own cellular apparatus. | |
| 2682. |
Question : Mention the information source of making protein in the cell. What is the basic event in reproduction. |
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Answer» Solution :(i) DNA (DEOXYRIBOSE Nucleic Acid) DIRECTS the synthesis of PROTEINS through mRNA (MESSENGER RNA). (ii) DNA copying is essential part of the PROCESS of reproduction. (1) DNA copying provides cellular apparatus in the daughter cells. (2) DNA in daughter cells will be able to control the functioning of daughter cells. (3) DNA copies will retain the traits. |
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| 2683. |
Question : Mention the important post-fertilisation changes in the flower. |
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Answer» Solution :The important post-fertilisation changes in FLOWER are : (i) Sepals, petals, stigma, style and stamen degenerate. (II) The fertilised egg develops into embryo. (III) The ovary ripens into fruit. (iv) The ovules ripens into seeds. (v) The integument of ovule changes into SEED coat. (vi) FUNICLE changes into stalk of the seed. |
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| 2684. |
Question : Mention the importance of transpiration in plants. |
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Answer» Solution :Transpiration is the process by which the excess of water is released by the plants to the ATMOSPHERE. It happens with the help of GUARD cells. When the guard cells SHRINK the stomatal pores open and the excess water is released to the environment. * It helps the plants to keep cool during hot conditions. *It helps plants to lose excess water. * As the excess water evaporates it indirectly helps US to get rain fall. * Through transpiration all the parts of the plants get water. * It helps the plants cells to be turgid. |
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| 2685. |
Question : Mention the function of forebrain, cerebellum and medulla. |
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Answer» Solution :Forebrain : It is the major THINKING part of the brain. Hypothalamus part of diencephalon in the fore brain controls hunger, thirst, FATIGUE, sleep, body temperature, sweating and emotions. Cerebellum: Precision of valuntary action such as WALKING in a straight line, riding a bicycle, PICKING up a pencil are possible because of cerebellum. Medulla : Involuntary action such as maintaining blood PRESSURE, salivation, vomiting are controlled by the medulla of the hind brain. |
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| 2686. |
Question : Give the function of epiglottis. |
| Answer» SOLUTION :PREVENT the ENTRY of FOOD into the GLOTTIS. | |
| 2687. |
Question : Mentionthefunctionof endosperm. |
| Answer» Solution :ENDOSPERM PROVIDES FOOD to the developing EMBRYO. | |
| 2688. |
Question : Mention the factor which is mainly responsible for inherited traits. State the two outcomesof Mendel's experiments. |
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Answer» SOLUTION :DNA that contains all the INFORMATION is the main factor responsible for INHERITED traits. Outcomes of Mendel.s experiments. (a) Both parents contribute equally towards the progeny. (b) Traits may be either dominant or recessive. (c) A dominant trait will be expressed in both heterozygous as well as homozygous condition while recessive trait will be expressed only in homozygous condition. (d) The traits are inherited INDEPENDENT of each other. |
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| 2689. |
Question : Mention the diseases caused by tobacco smoke. |
| Answer» Solution :Lung CANCER, bronchitis, pulmonary tuberculosis, EMPHYSEMA and hypoxia are some of the diseases caused by TOBACCO SMOKE. | |
| 2690. |
Question : Mention the components and functions of different Tissue Systems |
Answer» SOLUTION :
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| 2691. |
Question : Mentionthearery whichsuppliesbloodtothe heartmuscle . |
| Answer» SOLUTION :CORONARY ARTERIES. | |
| 2692. |
Question : Mention secondary sexual characters in human male and female. |
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Answer» Solution :Secondary sexual characters Male: 1. Hair growth on face, chest, ARMPIT (axillae) and over pubis. 2. Voice BECOMES deep and HOARSE DUE to growth of larynx called Adam.s apple. 3. Body becomes muscular. Female: 1. Growth of breasts and hair in axillae and over pubis. 2. Pelvis region becomes broad and BUTTOCKS become heavy due to deposition of fat. 3. Development of accessory sex organs. |
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| 2693. |
Question : Mention one role or each of the following : Fore - brain |
| Answer» SOLUTION :FORE - BRAIN : THINKING | |
| 2694. |
Question : Mention one role or each of the following : Medulla. |
| Answer» SOLUTION :MEDULLA : Controls involuntary ACTIONS like BLOOD pressure, salivation and VOMITING. | |
| 2695. |
Question : Mention one role or each of the following : Carabellum |
| Answer» Solution :CEREBELLUM : It is responsible for precision of voluntary actions and MAINTAINING the posture and balance of the body. | |
| 2696. |
Question : Mention one negative effect of our affluent life style on the environment. |
| Answer» SOLUTION : Our activities in our AFFLUENT life STYLE POLLUTE the environment. | |
| 2697. |
Question : Mention any four phenomena that can be observed due to atmospheric refraction of light on the earth. |
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Answer» SOLUTION :The sun is VISIBLE to us two minulcs before the ctual sunn rise. Thc sun is visible to us Iwo iutes after the actual sunsct also. The apparent position of the star is slightly different from its actual position. TWINKLING of star FORMALION of rainbow The apparent random WAVERING or flickering of objects seen through a turbulent stream of hot air rising above a fire or a radiator. |
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| 2698. |
Question : State True or False. Menstruation usually lasts for about two to eight days. |
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| 2699. |
Question : Menstruation is triggered by an abrupt decline in the amount of |
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Answer» luteinising hormone |
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