Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 8 Human Health and Disease. 11. Ans. What would happen to immune system, if thymus gland is removed from the body of a person? Personal and public hygiene plays important role in prevention and control of many infectious disease. So, mother’s milk is considered the most appropriate food for a new born infant. Antigens trapped in the lymph nodes are responsible for activation of lymphocytes present in lymph nodes. NCERT Solutions for Class 12 Maths; NCERT Solutions for Class 12 Business Studies; NCERT Solutions for Class 12 Accountancy ; NCERT Solutions for Class 12 Micro Economics; NCERT … Give the full form of CT and MRI. 18. 8. Compare the life style of people living in the urban areas with those of rural areas and briefly describe how the life style affects their health. In the figure, structure of an antibody molecule is shown. Hence, RNA offers more chances of mutation than DNA. When the related pathogen attacks in future, the immune system uses its ‘memory’ to fight the infection. NCERT Exemplar Solutions For Class 12 Biology Chapter 8 Human Health and Disease, Chapter 2 – Sexual Reproduction in Flowering Plants, Chapter 5 – Principles of Inheritance and Variation, Chapter 6 – Molecular Basis of Inheritance, Chapter 9 – Strategies for Enhancement in Food Production, Chapter 11 – Biotechnology: Principles and Processes, Chapter 12 – Biotechnology and its Applications, Chapter 15 – Biodiversity and Conservation, Important Questions for Class 12 Physical Education, Important Questions for Class 12 Chemistry, Important Questions for Class 12 Political Science, Important Questions for Class 12 Economics, Class 12 Physical Education Revision Notes, Previous Year Question Paper for Class 12, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Contamination and chances of some other diseases because of horse’s serum was quite high. What is cancer? Ans. Large scale production of vaccines was earlier done by using cell culture. (ii) It is slow and takes time to show response. Discuss their advantages. Sandwich ELISA – Antibody is coated on the microtiter well. 12. Rhino virus infects the nasal passage and respiratory tract only but does not infect the lungs. These solutions for Biomolecules are extremely popular among Class 11 Science students for Biology Biomolecules Solutions come handy for quickly completing your homework and preparing for exams. These infections can be easily prevented by avoiding contaminated food and water. One of the following is not the causal organism for ringworm. This produces spontaneous mutation in the viral genome. Class 12 Physics NCERT Solutions Chapter 12 Atoms. Ans. Hepatitis B vaccine is produced from yeast. Various public health measure to safeguard infections are: • … In the list given below, identify the infectious diseases. (i) they spread to other parts of the body as well. Questions based on diagrams (given in Class 12 Biology NCERT textbooks) have been frequently asked in board exams, every year. NCERT Solutions for class 12 Business studies Financial Management Class 12 Business studies Class book solutions are available in PDF format for free download. Lymph nodes trap microorganisms and antigens which get into lymph and tissue fluid. 9. • Passive immunity is the immunity which is achieved when the antibody is provided from outside. What are interferons? (a) Difficulty in respiration, fever, chills, cough, headache. If there are two pathogenic viruses, one with DNA and other with RNA, which would mutate faster? Removal of thymus has no significant effect on immunity because enough T-cells are generated during foetal stage, i.e. Solution: Study of … Biology. Another person has to share a bathroom with fifty other people. (vi) Fluid in lungs, fever, difficulty in breathing. Ans. Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 8 Human Health and Disease. The causative organism is Human Deficiency Virus (HIV). 3. The mucus secreted by inner lining of alimentary canal kills most of the microbial pathogens. 5. B-cells are formed in bone marrow, while T-cells are formed in thymus. Students who are in class 12th or preparing for any exam which is based on Class 12 Biology can refer NCERT Biology Book for their preparation. Why is it that India is yet to eradicate Polio? Identify the condition. Hence, a virus with RNA would mutate faster than a virus with DNA. They are not exposed to the external environment. It is their misuse that creates problems. When the pathogen strikes once again in future, the secondary response is more intensified. (a) 1: viral DNA is produced; 2: Viral RNA is produced by host cell. CBSE NCERT Solutions for Class 12 Science Chapter 8 . (iii) They cannot start a new tumor at a new place. List any four such withdrawal symptoms. NCERT Solutions of other subjects are also available to free download. NCERT Solutions for class 12 Business studies Organising Class 12 Business studies Class book solutions are available in PDF format for free download. (i) The ability to differentiate pathogens or foreign molecules from self-cells increase, (iii) More antibodies are produced in the body, (iv) The ability to differentiate pathogens or foreign molecules from self-cells is lost. Certain pathogens are tissue/organ specific. What are recombinant DNA vaccines? How many variable segments are present in the basic structure of antibody molecules. They act like cytokinine barriers. Download Free solutions of NCERT biology Class 12th from SaralStudy. He is less prone to suffer from malaria. Explanation: (a) latex of Papaver somniferum. Class 12 Computer Science Notes Chapter 5 Data Structures. Antibodies are the globular protein belonging to immunoglobulin (Ig) family. What are the various public health measures, which you would suggest as safeguard against infectious diseases? Class 12 Class 10 Home >> NCERT Solution >> Class >> Chemistry >> Aldehydes, Ketones and Carboxylic Acids >> write the structures of products of the following... Q1 Write the structures … This technology also helps in bringing down the cost of the vaccine. This programme has been undertaken with active cooperation from government agencies, NGOs, UNICEF and CDC. Ans. How are they caused? Which group of symptoms are indicative of pneumonia? 1. Describe the  common approaches for treatment of cancer. All Chapter 8 – Human Health and Disease exercise questions with solutions to help you to revise complete syllabus and score more marks in your examinations. Nasal congestion and discharge, sore throat, cough, headache. ESR test is done to find the sedimentation rate of RBCs and is used as a diagnostic tool for inflammation. (ii) Uses magnetic field and non-ionising radiations. At Saralstudy, we are providing you with the solution of Class 12 Chemistry Alcohols Phenols and Ethers according to the latest NCERT (CBSE) Book guidelines prepared by expert teachers. Let us compare two situations to understand this. Even a simple disease like common cold has more chances of spreading to many people in overcrowded places because the germs would be able to infect more number of people in shorter time span. It is a very old saying and is indeed true. 16. (c)  Maintaining hygiene: Maintaining personal hygiene can help us in avoiding various types of skin infections. In Chapter 12, Students will acquire the basic knowledge about Atoms in detail. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Practice Biomolecules questions and become a master of concepts. The basic principle of vaccination is ‘memory’ of the immune system. If you have any query regarding NCERT Exemplar Solutions for Class 12 Biology chapter 3 Human Reproduction, drop a comment below and we will get back to you at the earliest. 18.1, page 279 (NECRT Class XI - Biology) Visit www.ncerthelp.com For All NCERT solutions, CBSE sample papers, Question papers, Notes for Class 6 to 12 Please Visit www.ncerthelp.com For Video lectures of all subjects Class 9 to 12 But many people gulp down the whole bottle of cough syrup to get intoxicated. Ans. Ans. 4. A person has a bathroom for his exclusive use. What would happen if corpus luteum is not degenerated (a) Progesterone will not be secreted (b) Endometrium will disintegrate (c) Proliferation of endometrium will take place (d) Ovulation will take place 2. (d) health is the symbol of economic prosperity. “Prevention is better than cure”. A normal cell loses its ability to divide after certain rounds of cell division. This programme was launched in 1995-96. 14. This is not involved during shaking hands. In malignant tumors, the cells proliferate, grow rapidly and move to other parts of the body to form new tumors. In the metropolitan cities of India, many children are suffering from allergy/asthma. Two are the light chains that are identical and short and the other two are identical and longer and are called the heavy chains. Fungi responsible for ringworm infect the skin only. If a patient is advised Anti-Retroviral Therapy, he is likely to suffer from AIDS. It is produced by passage of virus through non-human cells at a sub-physiological temperature. The harmful allele of sickle cell anemia has not been eliminated from human population. Hence, cannabinoids are in the list of banned drugs by International Olympic Association. Students who are preparing for their Class 12 exams must go through NCERT Solutions for Class 12 Sociology Indian Society Chapter 2 The Demographic Structure of the Indian Society. Explanation: Even if a person is physically fit, lack of mental or social wellbeing will not enable him to lead quality life. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. 2. Widal test is used for diagnosis of typhoid. 1. Free PDF download of Important Questions with Answers for CBSE Class 12 Biology Chapter 8 – Human Health and Disease prepared by expert Biology teachers from latest edition of CBSE(NCERT) books only by CoolGyan to score more marks in CBSE board examination. Here we are trying to give you a detailed answer to the questions of the entire topic of this chapter so that you can get more marks in your examinations by preparing the answers based on this lesson. Maintaining a good hygiene level in such a bathroom would be almost impossible. Drugs and alcohol give short-term ‘high’ and long-term ‘damages’, Discuss. Download the PDF Sample Papers Free for off line practice and view the Solutions online. Enumerate the major adverse effects of such drugs in humans. CBSE NCERT Solutions for Class 12 Chemistry Chapter 14 Back of Chapter Questions 14.1. Moreover, peer pressure often forces them to try out something new. (b) What are the modes of consumption of these drugs? An alcoholic person may show following behavioural changes: Following steps can be taken to solve the problem: 5. Maharashtra State Board HSC Science (General) 12th Board Exam. Drugs like LSD, barbiturates, amphetamines, etc., are used as medicines to help patients with mental illness. Using this technology, yeast is normally used to produce antigens. Cannabinoids reduce the sensation of pain and thus helps in increasing the endurance of the athlete. In this method, strains of pathogen were injected to a suitable animal; like horses and antigens were allowed to proliferate inside the horse’s cells. Hence, option ‘a’ correct. Why is an antibody molecule represented as H2L2? Name the organism from which hepatitis B Vaccine is produced. They also need to get a high by adventure and experimentation. Ans. Q4: ... (antibody) – It helps in blood transfusion. Competitive ELISA – Microtiter well which is antigen-coated is filled with the antigen-antibody mixture. Why? NCERT Solutions for Class 11 Biology Chapter 9 are given below to download in PDF format. Ans. NCERT solutions for class 8 9 10 11 12. 10. A person suffering from sickle cell anemia has one benefit. The person should be encouraged and help to gradually reduce alcohol intake and if possible totally withdraw consumption of alcohol. Free PDF download of NCERT Exemplar for Class 12 Biology Chapter 8 - Human Health and Disease solved by expert Biology teachers on CoolGyan.Org as per NCERT (CBSE) Book guidelines. 1. Why is mother’s milk considered the most appropriate food for a new born infant? Morphine is a good example of plant metabolite which is a very strong painkiller. Ans. 20. Here Students can find Subject and year wise Solved Board Paper for Class 12. Large scale production at lower cost has become possible with this technology. 12. 15. Explanation: HIV is transmitted through exchange of body fluids. Why cannabinoids are banned in sports and games? The high polarity of the carbonyl group is explained on the basis of resonance involving a neutral and a dipolar structures as shown.Reference: Aldehydes Ketones and Carboxylic Acid Class 12 NCERT [Chemistry Part 2].#AldehydesKetonesandCarboxylicAcidclass12 #ncertchemistry #baseplus 20. As mentioned above, an antibody is a protein molecule in the shape of Y. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Antibodies present in colostrum which protect the new born from certain diseases is of. Ans. Students can solve NCERT Class 12 Chemistry Aldehydes, Ketones and Carboxylic Acids MCQs Pdf with Answers to know their preparation level. NCERT Class 12 Computer Science Chapter Data Structures Notes are one of the best pieces of study material that students can get as it will aid them to study better and reduce some stress that they might face while the hectic year ahead. Each antibody molecule has four peptide chains. (a) Which group of drugs does this represent? 6. Ans. physical, emotional and monetary costs. One should use properly filtered and treated water for drinking and cooking. (c) Shaking hands with infected persons. Why? Why is an antibody molecule represented as H 2 L 2 View solution. Similarly, codeine comes from opium plants. Suggest measures to overcome the problem. NCERT Book for Class 12 Biology Chapter 6 Molecular Basis of Inheritance is available for reading or download on this page. 126 Qs. Secondary metabolism (also called specialized metabolism) is a term for pathways and small molecule products of metabolism that are not absolutely required for the survival of the organism. PDF download free. Thus, they trigger the immune response as well. If we can check the breeding of mosquitoes in our surroundings, we can easily minimize the chances of suffering from these diseases. Which of the following is not a lymphoid tissue? Mother’s milk during initial days after delivery is called colostrum. Diseases like dysentery, cholera, typhoid etc., are more common in overcrowded human settlements. (c) Which cells of body are affected by the pathogen? NIOS Books and other books related to class 12th other than NCERT will also be uploaded as revision books. NCERT Solutions for Class 12 Biology Chapter 1 to 8 . (b) toxin released from Streptococcus infected cells, (c) toxin released from Plasmodium infected cells, (b) toxin released from Haemophilus infected cells, Ans. (c) Immunotherapy: This involves use of alpha-interferon so that some stubborn cancer cells can be destroyed by chemotherapeutic drugs. For example; some people are allergic to pollens from certain flowers. Prevention costs just a fraction of what it costs for treatment. 10. They should avoid going near such flowers. Hence, an identical twin is considered to be an advantage for an organ transplant. (i)  Body prepares antibodies in response to a pathogen or foreign material. MyCBSEguide provides solved papers, board question papers, revision notes and NCERT solutions for CBSE class 12 Biotechnology. He may get easily irritated and may suffer from bouts of anger and depression. Thus, it is responsible for determining the sex of the individual. Ans. (iii) They may start a new tumor when they reach a new place. Drugs and alcohol are used for getting a feeling of intoxication. Explain the role of lymph nodes in our immune response. Ans. कक्षा 11 तथा 12 गणित की NCERT पुस्तकें ; कक्षा 11 तथा 12 मनोविज्ञान की NCERT पुस्तकें; कक्षा 10 की NCERT पुस्तके Hindi तथा English Medium; Notes. Cannabinoids are obtained from Cannabis sativa. This happens because the immune system always tries to reject any foreign substance. Two chains are small and are called light chains. Due to this, one is advised to avoid such places during changing weather in order to avoid contacting infectious disease; like common cold or flu. 17. RNA replication is more prone to errors than DNA replication. In the given flow diagram, the replication of retrovirus in a host is shown. 6. Carbonyl compounds have substantial dipole moments and are polar than ethers. The term ‘Health’ is defined in many ways. Download CBSE Class 12 Solved Previous Year Papers. Ans. Notes for Atomic Structure chapter of class 12 physics. 9. cholera and jaundice. was last updated on 26th January 2021 Given below are the pairs of pathogens and the diseases caused by them. (c) does not show a matching pair, because Microsporum causes ringworm. Transplantation of tissues/organs to save certain patients often fails due to rejection of such tissues/organs by the patient. NCERT Solutions for Class 12 Sociology Chapter 2 The Demographic Structure of the Indian Society includes all the important topics with detailed explanation that aims to help students to understand the concepts better. NCERT Books Class 12 Biology Chapter 8 Human Health and Disease 1. How do they differ from each other? … Teratogenesis is related to congenital deformities. (b) A virus which has envelope enclosing RNA genome is called a retrovirus. 7. The body prepares antibodies in response to vaccination and remembers this act. Ans. (i)  Antibodies are deliberately put into the body by artificial means. In many diseases, the cost of treatment may reach a very high level. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 12 Aldehydes, Ketones, and Carboxylic Acids. Molecular Basis of Inheritance – CBSE Notes for Class 12 Biology NCERT Solutions Maths Physics Chemistry Biology Science The DNA and RNA World: 1. 1. Overcrowded human settlements are usually unhygienic because of overload on the infrastructure and on hygiene workers. (b) The leydig cells of the seminiferous tubules secrete the male sex hormone called testosterone. Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Ans. If a patient is advised Anti-Retroviral Therapy, which infection is he suffering from? In such a vaccine; instead of a whole strain of causative pathogen only one or two antigen is inserted into the DNA of a suitable host to prepare the vaccine. Many diseases can be diagnosed by observing the symptoms in the patient. Furthermore, remaining microbes are killed due to acidic pH in stomach. Ans. High fever, weakness, headache, stomach pain, constipation. In extreme cases, drug addicts resort to petty crimes to get money to buy their daily fix. 1. The bond angles are approximately 120 as expected of a trigonal coplanar structure.The carbon-oxygen double bond is polarised due to higher electronegativity of oxygen relative to carbon. Department of Oncology. 14. (c) Name the organ of the body which is affected by consumption of these drugs. The pathogenic virus with RNA will mutate faster. It carries 23 chromosomes, out of which one is sex chromosome (either X or Y). (iii) Have many options to splurge on processed food. 2. Structure Of An Atom All matter is made up of tiny particles known as atoms. From this book itself, students can learn about the social diversities of India and the world as well. Back of Chapter Questions . (b) Preventing vectors: Malaria and dengue are examples of vector borne diseases. 12. (vi) May not get quality medical facilities. Due to this, an antibody molecule is represented as H2L2. People often feel on a high after taking a drug or alcohol. Atom is made of electron, proton and neutrons. Name the causative organism. (c) the patient shows behavioural and social maladjustment. Download PDF's. Diseases are broadly grouped into infectious and non-infectious diseases. The following table shows certain diseases, their causative organisms and symptoms. What precaution should be taken to avoid such reactions. Explain. Codeine is used in cough syrups and is highly effective in suppressing coughing. Ans. 3. (a) Difficulty in respiration, fever, chills, cough, headache, (b) Constipation, abdominal pain, cramps, blood clots, (c) Nasal congestion and discharge, cough, sorethroat, headache, (d) High fever, weakness, stomach pain, loss of appetite and constipation, Ans. (a) Virus                      common cold. In your locality, if a person is addicted to alcohol, what kind of behavioural changes do you observe in that person? Drug abuse makes a person hallucinogenic and the person becomes useless not only for the society but also for himself. What are lifestyle diseases? Where are B-cells and T-cells formed? In case of identical twins; most of the tissues would identical in both the individuals. Ans. Page - 1. www.embibe.com. All the NCERT Solutions are updated according to NCERT Books 2020-21 for new academic session based on new CBSE Syllabus. The Ch 9 biomolecules Class 11 comes under Unit III - Structure and Function of Cells. Ans. Dronstudy provides free comprehensive chapterwise class 12 physics notes with proper images & diagram. dceta.ncert@nic.in 011 2696 2580 NCERT, Sri Aurobindo Marg, New Delhi-110016 Ans. Testosterone aids the development of secondary sex characteristics in males. Do you consider passive smoking is more dangerous than active smoking? And. Common approaches of treatment involve surgery, radiotherapy and immunotherapy: (a) Surgery: This involves removal of tumor through surgery. Following are four withdrawal symptoms: 11. It has four polypeptide chains. A qualified counselor should be pressed into service. So far, it is uploaded in the sections of NCERT Solutions of respective subjects. Enumerate the major adverse Effects of amphetamines: mental depression is a life-threatening condition March 2014, who declared a. Called `` paratope '' role in prevention and control of many infectious?. ’, Discuss free PDF download of CBSE Biology board exams complete physical, mental and social.... 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The seminiferous tubules secrete the male sex hormone called testosterone doing 11th from nios board smoker is aware about dangers. From identical twins ; most of the immune system uses its ‘ memory ’ to fight infection! Test: these tests show increased levels of cell count, grow rapidly move! Will clear students doubts about any question and improve application skills while preparing for board exams every! Hypersensitive reactions when exposed to certain substances present in the patient burden of the “ Y ” shape other.

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