{"id":27102,"date":"2019-09-13T14:20:48","date_gmt":"2019-09-13T08:50:48","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=27102"},"modified":"2019-09-16T10:27:56","modified_gmt":"2019-09-16T04:57:56","slug":"practice-questions-of-class-12-biology-human-health-and-disease","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/practice-questions-of-class-12-biology-human-health-and-disease\/","title":{"rendered":"Practice Questions of Class 12 Biology Human Health and Disease"},"content":{"rendered":"<p><strong>Practice Questions of Class 12 Biology Human Health and Disease. <\/strong>myCBSEguide has just released Chapter Wise Question Answers for class 12 Biology.\u00a0 There chapter wise Test papers with complete solutions are available for download in\u00a0<strong><a href=\"https:\/\/mycbseguide.com\/\">myCBSEguide<\/a>\u00a0<\/strong>website and mobile app. These Extra Questions with solution are prepared by our team of expert teachers who are teaching grade in CBSE schools for years. There are around 4-5 set of solved Biology Extra questions from each and every chapter. The students will not miss any concept in these Chapter wise question that are specially designed to tackle Board Exam. We have taken care of every single concept given in\u00a0<a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-12-biology\/1298\/\"><strong>CBSE Class 12 Biology<\/strong>\u00a0<strong>syllabus<\/strong><\/a>\u00a0and questions are framed as per the latest marking scheme and blue print issued by CBSE for Class 12.<\/p>\n<p style=\"text-align: center;\"><strong>CBSE Class 12 Biology Ch \u2013 8 Test Papers\u00a0<\/strong><\/p>\n<p style=\"text-align: center;\"><strong><a class=\"button\" href=\"https:\/\/mycbseguide.com\/dashboard\/category\/1306\/type\/4\">Download as PDF<\/a><\/strong><\/p>\n<h2>CBSE Class 12 Biology Chapter 4 Test Papers<\/h2>\n<div class=\"justify-content-center d-flex\" style=\"text-align: center;\"><strong>Ch-8 Human Health and Disease<\/strong><\/div>\n<ol>\n<li class=\"question-list\">Pathogenic bacterium that cause typhoid fever in human being is\n<ol start=\"1\">\n<li class=\"question-list\"><span class=\"mcq_option_text\">Streptococcus typhi<\/span><\/li>\n<li class=\"question-list\">Salmonella feverish<\/li>\n<li class=\"question-list\">Salmonella typhi<\/li>\n<li class=\"question-list\">Streptococcus pneumonia<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">Antigen binding site in an antibody is found between\n<ol start=\"1\">\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Either between two light chains or between one heavy and one light chain depending upon the nature of antigen<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Two heavy chains<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">One heavy and one light chain<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Two light chains<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\">Addiction is a psychological attachment to certain effects such as<\/div>\n<ol start=\"1\">\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">None of these<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Euphoria and temporary feeling of well beings<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Hydrophobia and temporary feeling of well beings<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Euphoria and permanent feeling of well beings<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\">AIDS can be transmitted by<\/div>\n<ol start=\"1\">\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Hugging<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Handshake<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Courtship<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Blood transfusion<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\">Marijuana, hashish, charas and ganja are known for their effects on<\/div>\n<ol start=\"1\">\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Digestive system of the body<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Cardiovascular system of the body<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Reproductive system of the body<\/span><\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-marks\"><span class=\"mcq_option_text\">Respiratory system of the body<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">Which form of E. histolytica serves for transmission of the parasite?<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">All normal cells have inherent characteristics of becoming cancerous. Explain.<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">Name the two types of cells in which the HIV multiplies after gaining entry into the human body.<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">Name the disease against which DPT vaccine develops immunity.<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">What happens in lymphoid organs with respect to immunity?<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">Mention the useful as well as the harmful drug obtained from the latex of poppy plant.<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">Expand the following terms:\n<ol start=\"1\">\n<li class=\"question-list\">MALT<\/li>\n<li class=\"question-list\">CMI<\/li>\n<li class=\"question-list\">AIDS<\/li>\n<li class=\"question-list\">NACO<\/li>\n<li class=\"question-list\">HIV<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">Write a short note on vaccination.<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">How HIV multiplies in the host body?<\/div>\n<\/div>\n<\/li>\n<li class=\"question-list\">\n<div class=\"question-container\">\n<div class=\"question-text\">Define the term addiction. Name some drugs which are normally used as medicines but are often abused.<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<p style=\"text-align: center;\"><strong>Ch-8 Human Health and Disease<\/strong><\/p>\n<p><strong>Answer<\/strong><\/p>\n<ol>\n<li class=\"question-list\">\n<ol start=\"3\" type=\"a\">\n<li>Salmonella typhi,\u00a0<strong>Explanation:\u00a0<\/strong>Typhoid fever in human being is caused by Salmonella typhi. The pathogen enters to small intestine through food and contaminated water and migrates to other organs through blood.<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<ol start=\"1\" type=\"a\">\n<li>One heavy and one light chain,\u00a0<strong>Explanation:\u00a0<\/strong>The antigen-binding (Fab) fragment is a region on an antibody that binds to antigens. It is composed of one constant and one variable domain of each of the heavy and the light chain.<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<ol start=\"2\" type=\"a\">\n<li>Euphoria and temporary feeling of well beings,\u00a0<strong>Explanation:\u00a0<\/strong>Because natural pleasures in our lives are necessary for survival, the limbic system creates an appetite that drives you to seek out those things.<br \/>\nEuphoria is an affective state in which a person experiences pleasure or excitement and intense feelings of well-being and happiness. Certain drugs, many of which are addictive, can cause euphoria, which at least partially motivates their recreational use.<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<ol start=\"4\" type=\"a\">\n<li>Blood transfusion,\u00a0<strong>Explanation:\u00a0<\/strong>AIDS can be transmitted from infected person to healthy person through blood transfusion. The most common way of transmission of AIDS is during sexual intercourse with multiple partners without protection.<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">\n<ol start=\"2\" type=\"a\">\n<li>Cardiovascular system of the body,\u00a0<strong>Explanation:\u00a0<\/strong>The cardiovascular system consists of the heart, blood vessels, and the approximately 5 liters of blood that the blood vessels transport.<br \/>\nMarijuana, Hashsh, Charas and Ganja are generally taken by inhalation and oral ingestion. They cause their effects on cardiovascular system of the body.<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\">Tetranucleate cyst<\/li>\n<li class=\"question-list\">All normal cells have cellular oncogenes (c-onc) or proto oncogenes when activated under certain conditions, can lead to oncogenic transformation of cells.<\/li>\n<li class=\"question-list\">Macrophages and Helper T-lymphocytes<\/li>\n<li class=\"question-list\">Diptheria, Pertussis (whooping cough) and tetanus.<\/li>\n<li class=\"question-list\">The maturation and proliferation of lymphocytes.<\/li>\n<li class=\"question-list\">&#8211; Morphine is useful drug.<br \/>\n&#8211; Heroin is harmful drug.<\/li>\n<li class=\"question-list\">\n<ol start=\"1\">\n<li class=\"question-list\">MALT &#8211; Mucosal associated lymphoid tissue<\/li>\n<li class=\"question-list\">CMI &#8211; Cell Mediated Immunity<\/li>\n<li class=\"question-list\">AIDS &#8211; Acquired Immuno Deficiency Syndrome<\/li>\n<li class=\"question-list\">NACO &#8211; National AIDS control Organisation<\/li>\n<li class=\"question-list\">HIV &#8211; Human Immuno Deficiency Virus.<\/li>\n<\/ol>\n<\/li>\n<li class=\"question-list\"><strong>Vaccination<\/strong>: Vaccination is a technique to develop immunity without inducing actual infection. It is based on the property of &#8216;memory&#8217; of the immune system. Weakened (attenuated) or dead pathogens are injected into a person to be immunized against that pathogen&#8217;s active form. The pathogen administered through a vaccine is unable to cause the disease but is sufficient to stimulate the formation of antibodies by activating the host\u2019s immune system that recognizes the antigens. Thus, a vaccinated person develops immunity against the pathogen without contracting the disease. The vaccines also generate memory- B and T-cells that recognize the pathogen quickly on subsequent exposure and massively produce antibodies quickly thus dominating over the pathogen. This method comes under active immunization.<\/li>\n<li class=\"question-list\">HIV enters into macrophages and its RNA replicates with the hosts cell DNA, so the infected cells produce virus particles and finally act as HIV factory. Now HIV enters into T-lymphocytes to replicate and thus there is a decrease in number of Helper T-cells.<\/li>\n<li class=\"question-list\">Addiction is a psychological attachment to certain effects &#8211; such as euphoria and a temporary feeling of well-being associated with drugs and alcohol.<br \/>\nBarbiturates, amphetamines, benzodiazepines and LSD (Lysergic acid diethyl amides) are normally used as medicines to help patients cope with mental illnesses are often abused.<\/li>\n<\/ol>\n<div class=\"justify-content-center d-flex\">\n<h2>Class 12 Biology Chapter Wise Test Paper<\/h2>\n<ol>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/important-questions-for-class-12-biology-reproduction-in-organisms\/\">Reproduction in Organisms<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-for-class-12-biology-sexual-reproduction-in-flowering-plants\/\">Sexual Reproduction in Flowering Plants<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/class-12-biology-human-reproduction-extra-qusetions\/\">Human Reproduction<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-for-class-12-biology-reproductive-health\/\">Reproductive Health<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/class-12-biology-principles-of-inheritance-and-variation-extra-questions\/\">Principles of Inheritance and Variation<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-of-class-12-biology-molecular-basis-of-inheritance\/\">Molecular Basis of Inheritance<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/class-12-biology-evolution-chapter-7-important-questions\/\">Evolution<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/practice-questions-of-class-12-biology-human-health-and-disease\/\">Human Health and Disease<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-for-class-12-biology-strategies-for-enhancement-in-food-production\/\">Strategies for Enhancement in Food Production<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/class-12-biology-microbes-in-human-welfare-extra-questions\/\">Microbes in Human Welfare<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-of-class-12-biology-biotechnology-principles-and-processes\/\">Biotechnology Principles and Processes<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-for-class-12-biology-biotechnology-and-its-applications\/\">Biotechnology and its Applications<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/class-12-biology-organisms-and-populations-important-questions\/\">Organisms and Populations<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/class-12-biology-chapter-14-ecosystem-extra-questions\/\">Ecosystem<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/extra-questions-for-class-12-biology-biodiversity-and-conservation\/\">Biodiversity and Conservation<\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/blog\/important-questions-of-class-12-biology-environmental-issues\/\">Environmental Issues<\/a><\/li>\n<\/ol>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Practice Questions of Class 12 Biology Human Health and Disease. myCBSEguide has just released Chapter Wise Question Answers for class 12 Biology.\u00a0 There chapter wise Test papers with complete solutions are available for download in\u00a0myCBSEguide\u00a0website and mobile app. These Extra Questions with solution are prepared by our team of expert teachers who are teaching grade &#8230; <a title=\"Practice Questions of Class 12 Biology Human Health and Disease\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/practice-questions-of-class-12-biology-human-health-and-disease\/\" aria-label=\"More on Practice Questions of Class 12 Biology Human Health and Disease\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1435,1346],"tags":[151,1839,1838,1833,1832,28],"class_list":["post-27102","post","type-post","status-publish","format-standard","hentry","category-biology-cbse-class-12","category-cbse","tag-cbse-class-12-biology","tag-extra-questions","tag-important-questions","tag-latest-exam-questions","tag-practice-questions","tag-test-papers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Practice Questions of Class 12 Biology Human Health and Disease<\/title>\n<meta name=\"description\" content=\"Practice Questions of Class 12 Biology Human Health and Disease myCBSEguide has just released Chapter Wise solution for class 12 Biology\" \/>\n<meta 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