Bihar Board Class 12 (Science) Human Health and Disease — practice questions
90 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Bihar Board Class 12 (Science) Human Health and Disease in the app →Antibodies are produced byAntibodies passed from a mother to her infant through breast milk give the infantVaccination provides protection against future infection mainly byHIV primarily infectsThe spread of cancer cells from the original site to distant organs is calledCervical cancer is most commonly caused byPolio is caused by:The vector that transmits MALARIA is:According to WHO, health is best defined as:Innate immunity is best described as:The MOST ABUNDANT antibody class in human blood is:HPV (Human Papillomavirus) is a known cause of:Which of these is a common opioid drug of abuse?Typhoid fever is caused by:Which Plasmodium species causes malignant malaria, the most serious form?Pneumonia-causing bacteria mainly infect which part of the lungs?Haemophilus influenzae is a bacterium linked with which human disease?Which group of viruses causes the common cold?Rhinoviruses infect the nose and airways but do not reach the:Symptoms of the common cold usually last for about how long?Which toxic substance, released when RBCs rupture, causes the chills and fever of malaria?Inside the human body, where do malarial parasites multiply first?In the mosquito, where are Plasmodium sporozoites stored?Entamoeba histolytica, which causes amoebic dysentery, lives in the human:Which insects act as mechanical carriers of the amoebiasis parasite?Ascaris, an intestinal helminth, is commonly known as the:Filarial worms usually live for years in which part of the body?Which conditions help ringworm fungi thrive in skin folds such as the groin?Which fish is introduced into ponds to feed on mosquito larvae?Dengue and chikungunya are spread by which mosquito?Stomach acid, saliva and tears belong to which innate immunity barrier?The mucus coating lining the respiratory tract is which kind of barrier?Interferons, which protect nearby non-infected cells, are secreted by:Neutrophils, monocytes and natural killer cells form which innate barrier?The highly intensified response on meeting the same pathogen a second time is called:Antibody-mediated immunity is also called the:Rejection of a transplanted organ is mainly caused by:Which lymphocytes help B cells make antibodies but secrete none themselves?Which type of immunity is slow and takes time to give its full response?Injecting antitoxin into a tetanus patient is an example of:Recombinant hepatitis B vaccine is produced using which organism?Antibodies produced against allergens belong to which class?Mast cells cause allergy symptoms by releasing:Which group of drugs quickly reduces the symptoms of allergy?Which pair are the primary lymphoid organs in humans?Which bean-shaped lymphoid organ filters blood and stores erythrocytes?Peyer's patches, a secondary lymphoid tissue, are found in the:HIV belongs to which group of viruses?Which enzyme converts the RNA genome of HIV into viral DNA?The usual time lag between HIV infection and AIDS symptoms is:In an HIV-infected person, which cells act like an HIV factory?Unlike malignant tumors, benign tumors usually:Genes in normal cells that can cause cancer when activated are called:Which of these DNA-damaging radiations is non-ionising?Magnetic resonance imaging detects tissue changes using:Alpha-interferon given to cancer patients acts as a:Heroin, commonly called smack, is chemically:Morphine is extracted from the latex of which plant?Natural cannabinoids are obtained from which part of Cannabis sativa?Cocaine interferes with the transport of which neurotransmitter?Nicotine makes the adrenal gland release which hormones?Smoking raises carbon monoxide in blood and so lowers its:Adolescence is usually taken as which age range?A psychological attachment to effects like euphoria from drugs is called:With repeated drug use, body receptors begin to respond only to:Chronic alcohol use damages the liver, causing:Which anabolic steroid side effect occurs only in males?Anabolic steroids may stunt growth in adolescents by causing:Which parenting style is linked to lower risk of substance abuse?People who inject drugs intravenously are at high risk of:Health is best defined as a state of complete:The injection given for a snakebite contains:Which statement best defines health?Disease-causing organisms are collectively calledTyphoid fever in humans is caused by which organism?Which test is used to confirm typhoid fever?Sustained high fever in typhoid typically reaches aboutWhich pair of bacteria is responsible for pneumonia in humans?The common cold is caused by which group of viruses?Malaria is caused by a tiny protozoan namedPlasmodium enters the human body in which infectious form?The chill and fever of malaria recur because RBC rupture releasesAmoebic dysentery is caused by the protozoanWhich helminth is known as the common round worm?Elephantiasis is caused by the filarial wormRingworm is caused by fungi of which genera?Which symptom marks ringworm infection?Neutrophils, monocytes and macrophages that phagocytose microbes form theWhat is the role of T-cells in antibody production?Rejection of a transplanted graft is due to which response?