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NEET • BIOLOGY • HUMAN HEALTH AND DISEASES
Human health and diseases practice · Medium
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Showing 61-90 of 114 questions
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Remembering
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What is true about T-lymphocytes is mammals?
View answer and explanation
Correct option: C
There are three main types-cyctotoxic T-cells, helper T-cells and suppressor T-cells
Option C (There are three main types-cyctotoxic T-cells, helper T-cells and suppressor T-cells) is correct because T-lymphocytes are classified into cytotoxic T-cells (killer T-cells), helper T-cells, and suppressor T-cells, each with distinct functions in the immune response.
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Remembering
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Largest single mass of lymphatic tissue in the body is
View answer and explanation
Correct option: B
Spleen
Option B (Spleen) is correct because the spleen is the largest single mass of lymphatic tissue in the body, playing a crucial role in filtering blood and housing immune cells.
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Understanding
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Assertion: Dust particles when come in contact with respiratory tract lead to sneezing, running nose, redness of eyes, etc.
Reason: Allergic disorders are caused due to release of histamine.
Reason: Allergic disorders are caused due to release of histamine.
View answer and explanation
Correct option: A
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are correct and Reason is the correct explanation of Assertion) is correct because histamine release is the primary cause of allergic symptoms like sneezing and runny nose.
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Understanding
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Which of the following statements best describes the role of reverse transcriptase?
View answer and explanation
Correct option: C
Synthesis of DNA from genomic RNA
Option B is correct because reverse transcriptase is an enzyme that synthesizes DNA from an RNA template, specifically genomic RNA in this context.
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Remembering
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HIV is a member of group of viruses alled
View answer and explanation
Correct option: A
Retrovirus
Option A (Retrovirus) is correct because HIV belongs to the retrovirus family, characterized by using reverse transcriptase to convert RNA to DNA.
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Understanding
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Benign tumours
I. remain confined to their original location and do not spread to other parts
II. cause little damage
Which of the statements given above is/are correct?
I. remain confined to their original location and do not spread to other parts
II. cause little damage
Which of the statements given above is/are correct?
View answer and explanation
Correct option: C
I and II
Option C (I and II) is correct because benign tumors are confined to their original location and generally cause little damage.
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Analyzing
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A person is suffering from one disease and shows the following symptoms, like sustained high fever (39 to 40 degree Celsius), weakness, stomach pain, constipation, headache and loss of appetite. His doctor confirmed that he is suffering from one bacterial infection.
On which of the following facts (given below) his doctor confirmed the bacterial infection.
(i) Salmonella typhi bacteria are responsible for the infection
(ii) Streptococcus pneumonia is responsible for the infection
(iii) By seeing the report which shows the positive result of Widal test
(iv) The pathogen is transmitted through the bite of female Anopheles mosquito
(v) As a result of infection, the alveoli get filled with fluid leading to severe problem in respiration
On which of the following facts (given below) his doctor confirmed the bacterial infection.
(i) Salmonella typhi bacteria are responsible for the infection
(ii) Streptococcus pneumonia is responsible for the infection
(iii) By seeing the report which shows the positive result of Widal test
(iv) The pathogen is transmitted through the bite of female Anopheles mosquito
(v) As a result of infection, the alveoli get filled with fluid leading to severe problem in respiration
View answer and explanation
Correct option: A
(i) and (iii) only
Option A is correct because the symptoms and Widal test positivity confirm Salmonella typhi infection, which causes typhoid fever.
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Remembering
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Which technique uses the body’s water molecules as the bases for its images?
View answer and explanation
Correct option: B
MRI
Option B (MRI) is correct because Magnetic Resonance Imaging (MRI) uses the body's water molecules and their response to magnetic fields to generate images.
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Understanding
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Regarding pathogens consider the following statements
I. A pathogen or an infectious agent is a microorganism, such as a virus, bacterium, fungus that causes disease in its host
II. These pathogens multiply in our body and interfere with the normal vital activities, resulting in morphological and functional damage
Which of the following statement (s) is/are correct?
I. A pathogen or an infectious agent is a microorganism, such as a virus, bacterium, fungus that causes disease in its host
II. These pathogens multiply in our body and interfere with the normal vital activities, resulting in morphological and functional damage
Which of the following statement (s) is/are correct?
View answer and explanation
Correct option: C
I and II
Option C (I and II) is correct because both statements accurately describe pathogens and their effects on the host.
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Analyzing
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A male showing aggressiveness, mood swings, depression, reduction of size of the testicles, decreased sperm production, breast enlargement premature baldness. Possibly he is taking
View answer and explanation
Correct option: A
Anabolic steroids
Option A is correct because the symptoms described (aggressiveness, mood swings, testicular size reduction, etc.) are characteristic side effects of anabolic steroid use.
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Understanding
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Reasons for alcohol abuse in adolescents are
I. social pressure
II. curiosity and need for adventure, excitement and experiment
III. to escape from stress, depression and frustration
IV. to overcome hardships of daily life
Which of the statements given above are correct?
I. social pressure
II. curiosity and need for adventure, excitement and experiment
III. to escape from stress, depression and frustration
IV. to overcome hardships of daily life
Which of the statements given above are correct?
View answer and explanation
Correct option: D
I, II, III and IV
Option D (I, II, III and IV) is correct because all listed reasons contribute to alcohol abuse in adolescents.
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Remembering
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Which of the following is used in the production of the recombinant Hepatitis B vaccine?
View answer and explanation
Correct option: A
Yeast
Option A (Yeast) is correct because yeast is commonly used as a host organism in the production of recombinant Hepatitis B vaccine.
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Analyzing
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Study the following.
a. Heroin is a depressant and slows down body functions
b. Cannabinoids are known for their effects on cardio vascular system
c. Opioid receptors are present in CNS and GI tract
d. Crack has a potent inhibitory action on CNS
Which of the above are incorrect?
a. Heroin is a depressant and slows down body functions
b. Cannabinoids are known for their effects on cardio vascular system
c. Opioid receptors are present in CNS and GI tract
d. Crack has a potent inhibitory action on CNS
Which of the above are incorrect?
View answer and explanation
Correct option: D
Only d
Option D is correct because Crack is a stimulant, not a depressant, and therefore does not have an inhibitory action on the CNS.
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Understanding
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Necessary steps for achieving good health are
I. awareness about disease
II. vaccination
III. proper disposal of wastes
IV. maintenance of hygienic food and water resources
V. Water resources
The correct combination having necessary steps is
I. awareness about disease
II. vaccination
III. proper disposal of wastes
IV. maintenance of hygienic food and water resources
V. Water resources
The correct combination having necessary steps is
View answer and explanation
Correct option: D
I, II, III and IV
The correct answer is D (I, II, III and IV) because all listed steps are necessary for achieving good health.
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Analyzing
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Assertion: Sometimes nonsmokers are prone to
lung cancer.
Reason: Nonsmokers are also called passive
smokers.
lung cancer.
Reason: Nonsmokers are also called passive
smokers.
View answer and explanation
Correct option: B
If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion
is not the correct explanation of Assertion
Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because while both statements are true, passive smoking isn't the only reason for lung cancer in non-smokers; genetic predisposition and other environmental factors also play a role.
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Analyzing
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Assertion: Artificially acquired passive immunity
results when antibodies or lymphocytes
produced outside the host are introduced into a
host.
Reason: A bone marrow transplant given to a
patient with genetic immunodeficiency is an
example of artificially acquired passive immunity.
results when antibodies or lymphocytes
produced outside the host are introduced into a
host.
Reason: A bone marrow transplant given to a
patient with genetic immunodeficiency is an
example of artificially acquired passive immunity.
View answer and explanation
Correct option: B
If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion
is not the correct explanation of Assertion
Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because artificially acquired passive immunity involves introducing antibodies or lymphocytes, and bone marrow transplants address genetic deficiencies but are not an example of passive immunity.
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Remembering
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Exotoxins are related with
View answer and explanation
Correct option: C
Cancer
Option D (Both (a) and (b)) is correct because exotoxins are associated with both tetanus and diphtheria.
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Remembering
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In Plasmodium, ookinete is formed by
View answer and explanation
Correct option: B
Zygote
Option B (Zygote) is correct because the ookinete, a motile and elongated form of the Plasmodium parasite, develops from the zygote within the mosquito's midgut.
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Application
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A young drug addict used to show symptoms of depressed brain activity, feeling of calmness, relaxation and drowsiness. Possibly he was taking:
View answer and explanation
Correct option: D
Valium
Option D is correct because Valium is a benzodiazepine, which is known to cause depressed brain activity, calmness, relaxation, and drowsiness.
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Remembering
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Which one is anti-allergic antibody:
View answer and explanation
Correct option: C
Ig E
Option C (Ig E) is correct because IgE is the antibody primarily associated with allergic reactions.
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Remembering
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Which of the following is not released by the most cells during allergic reactions.
View answer and explanation
Correct option: A
Adrenalin
Option A (Adrenalin) is correct because adrenalin (epinephrine) is not typically released by mast cells during allergic reactions. Mast cells primarily release histamine and serotonin.
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Understanding
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Antigen binding site of immunoglobulin is
View answer and explanation
Correct option: D
Variable region of both heavy and light chain
Option D (Variable region of both heavy and light chain) is correct because the antigen-binding site of an immunoglobulin is formed by the variable regions of both the heavy and light chains.
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Remembering
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Pneumonia is an infection of
View answer and explanation
Correct option: D
Lungs
Option D (Lungs) is correct because pneumonia is specifically an infection of the lungs, causing inflammation and fluid accumulation.
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Understanding
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Select the true statement
I. AIDS has no cure, prevention is the best option
II. During HIV infection, the person suffers from fever, weight loss and diarrhoea
III. HIV is a retrovirus, which means its genetic material is DNA
I. AIDS has no cure, prevention is the best option
II. During HIV infection, the person suffers from fever, weight loss and diarrhoea
III. HIV is a retrovirus, which means its genetic material is DNA
View answer and explanation
Correct option: A
I and II
Option A (I and II) is correct because AIDS has no cure and prevention is best, and fever, weight loss, and diarrhea are common symptoms of HIV infection.
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Remembering
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A drug, which causes hallucinations at high dosage, is obtained from
View answer and explanation
Correct option: A
Erythroxylum coca
Option A (Erythroxylum coca) is correct because high doses of cocaine, derived from Erythroxylum coca, can cause hallucinations.
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Understanding
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Select the incorrect statement w.r.t. allergy
View answer and explanation
Correct option: C
Allergy is due to the release of chemicals like histamine and serotonin from eosinophils.
Option C is the incorrect statement because allergy is due to the release of histamine and serotonin from mast cells and basophils, not eosinophils.
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Remembering
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Triatoma infestans is the intermediate host in the life cycle of
View answer and explanation
Correct option: B
Trypanosoma cruzi
Option B (Trypanosoma cruzi) is correct because Triatoma infestans, also known as the \"kissing bug,\" is the vector for Trypanosoma cruzi, the parasite that causes Chagas disease.
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Understanding
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Regarding common cold consider the following statements
I. Rhinovirus is responsible for common cold which infects the nasal epithelium and respiratory passage but not the lungs
II. The symptoms of common cold included nasal congestion and discharge, sore throat, gruffiness, cough, headache and tiredness
Which of the statement given above is/are correct?
I. Rhinovirus is responsible for common cold which infects the nasal epithelium and respiratory passage but not the lungs
II. The symptoms of common cold included nasal congestion and discharge, sore throat, gruffiness, cough, headache and tiredness
Which of the statement given above is/are correct?
View answer and explanation
Correct option: C
I and II
Option C (I and II) is correct because both statements accurately describe the common cold and its symptoms.
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Remembering
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Male Anopheles does not transmit malarial parasite because
View answer and explanation
Correct option: D
It does not drink blood
Option D (It does not drink blood) is correct because only female Anopheles mosquitoes require blood meals to develop their eggs, and thus transmit the malarial parasite.
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Remembering
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Tiny lesions of multiple sclerosis on brain and spinal tissue can be observed by
View answer and explanation
Correct option: A
Magnetic resonance imaging
The correct answer is A (Magnetic resonance imaging) because MRI is highly sensitive in detecting lesions in soft tissues like the brain and spinal cord.
Revision notes and key takeaways
Review HUMAN HEALTH AND DISEASES in your textbook or class notes, then use this set to check your understanding.
Showing 61-90 of 114 questions
