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NEET • BIOLOGY • HUMAN HEALTH AND DISEASES
Human health and diseases practice · Mixed difficulty
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61
Easy
61 of 259
Understanding
+4 | -1
Cancerous cells spread through
View answer and explanation
Correct option: D
All of the above
The correct answer is D (All of the above) because cancerous cells can spread through the lymph system, blood stream, and by direct extension through secondary growths.
62
Easy
62 of 259
Remembering
+4 | -1
The antibody that generally involves in allergic response is
View answer and explanation
Correct option: C
IgE
Option C (IgE) is correct because IgE antibodies are primarily involved in allergic responses by binding to mast cells and basophils, leading to the release of histamine and other inflammatory mediators.
63
Medium
63 of 259
Remembering
+4 | -1
OPV (vaccine) is administered to children in India for protection against
View answer and explanation
Correct option: B
Polio
Option B (Polio) is correct because OPV stands for Oral Polio Vaccine, which is administered to protect against poliomyelitis.
64
Hard
64 of 259
Remembering
+4 | -1
Who received Nobel Prize in 2008 for the discovery of HIV?
View answer and explanation
Correct option: B
Luc Montagnier
Option B (Luc Montagnier) is correct because Luc Montagnier shared the Nobel Prize in 2008 for the discovery of HIV, the virus that causes AIDS.
65
Medium
65 of 259
Analyzing
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Assertion: Dye workers generally suffer from
bladder cancer.
Reason: These are more exposed to a
carcinogenic chemical benzopyrene.
bladder cancer.
Reason: These are more exposed to a
carcinogenic chemical benzopyrene.
View answer and explanation
Correct option: C
If Assertion is true but Reason is false
Option C (If Assertion is true but Reason is false) is correct because dye workers do have a higher risk of bladder cancer, but the carcinogenic chemical they are exposed to is typically aromatic amines, not benzopyrene.
66
Medium
66 of 259
Remembering
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Secondary metabolite is
View answer and explanation
Correct option: C
Antibiotics
Option C (Antibiotics) is correct because antibiotics are secondary metabolites produced by microorganisms, often used for defense or signaling.
67
Hard
67 of 259
Remembering
+4 | -1
Which test from the list below is used to identify AIDS?
View answer and explanation
Correct option: A
Western blot and an ELISA test
Option A (Western blot and an ELISA test) is correct because the ELISA test is used for initial screening for HIV, and a positive ELISA result is confirmed by the Western blot test.
68
Medium
68 of 259
Analyzing
+4 | -1
Select the incorrect statements regarding AIDS from the following
I) AIDS is caused by a retrovirus have two molecules of single-stranded RNA as its genome
II) AIDS can be successfully treated using anti-retroviral drungs
III) Macrophages act as a viral factory as it leads to the continuous production of new viral particles
IV) In AIDS, a decrease in B-lymphocyte count is seen
I) AIDS is caused by a retrovirus have two molecules of single-stranded RNA as its genome
II) AIDS can be successfully treated using anti-retroviral drungs
III) Macrophages act as a viral factory as it leads to the continuous production of new viral particles
IV) In AIDS, a decrease in B-lymphocyte count is seen
View answer and explanation
Correct option: A
II and IV
Option A (II and IV) is correct because AIDS cannot be successfully treated using anti-retroviral drugs (they only suppress the virus) and in AIDS, there is a decrease in T-lymphocyte count, not B-lymphocyte count.
69
Hard
69 of 259
Analyzing
+4 | -1
Study the given statements about HIV.
i. The primary target cells for HIV are macrophages and helper
T-lymphocytes
ii. HIV is a non-enveloped retrovirus, having two identical molecules of
ss RNA genome
iii. HIV gets attached to the CD8 receptors present on helper T-lymphocytes to gain entry in them
iv. A widely used diagnostic test for AIDS is enzyme linked immune-sorbent assay (ELISA)
v. Treatment of AIDS with anti-retroviral drugs is only partially effective.
How many of the above given statements are correct?
i. The primary target cells for HIV are macrophages and helper
T-lymphocytes
ii. HIV is a non-enveloped retrovirus, having two identical molecules of
ss RNA genome
iii. HIV gets attached to the CD8 receptors present on helper T-lymphocytes to gain entry in them
iv. A widely used diagnostic test for AIDS is enzyme linked immune-sorbent assay (ELISA)
v. Treatment of AIDS with anti-retroviral drugs is only partially effective.
How many of the above given statements are correct?
View answer and explanation
Correct option: D
3
Option D (3) is correct because statements i, iv, and v are correct, while ii and iii are incorrect.
70
Medium
70 of 259
Understanding
+4 | -1
Consider the following statements
I. Neural system and endocrine system influences our immune system
II. Immune system maintains our health
Which of the statement (s) given above is/are correct?
I. Neural system and endocrine system influences our immune system
II. Immune system maintains our health
Which of the statement (s) given above is/are correct?
View answer and explanation
Correct option: C
I and II
Option C (I and II) is correct because both the neural and endocrine systems can influence the immune system, and the immune system is crucial for maintaining health.
71
Medium
71 of 259
Application
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If a person in infected with some deadly microbe to which quick immune response is required as in tetanus, what should be done?
View answer and explanation
Correct option: B
We need to directly inject pre formed antibodies as ATS injection
Option B (We need to directly inject pre formed antibodies as ATS injection) is correct because in cases like tetanus, where a quick immune response is crucial, pre-formed antibodies (as in Antitoxin Serum - ATS) provide immediate passive immunity.
72
Medium
72 of 259
Understanding
+4 | -1
Alpha-interferons
View answer and explanation
Correct option: C
Both (1) and (2)
Option C (Both (1) and (2)) is correct because alpha-interferons activate the immune system and help in destroying tumors.
73
Medium
73 of 259
Remembering
+4 | -1
A female Anopheles mosquito can be recognized by
View answer and explanation
Correct option: A
Proboscis and palpi are long and more or less of equal length
Option A (Proboscis and palpi are long and more or less of equal length) is correct because this is a key distinguishing feature of female Anopheles mosquitoes.
74
Medium
74 of 259
Remembering
+4 | -1
The most abundant antibody produced against allergens is
View answer and explanation
Correct option: A
IgE
Option A (IgE) is correct because IgE is the primary antibody involved in allergic reactions.
75
Hard
75 of 259
Remembering
+4 | -1
Which of the following substances is added to ophthalmic solutions as a preservative?
View answer and explanation
Correct option: B
Quaternary ammonium salts
Option B is correct. Quaternary ammonium salts are commonly used as preservatives in ophthalmic solutions.
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76
Hard
76 of 259
Remembering
+4 | -1
Continuous exposer to vinyl chloride may cause cancer of the
View answer and explanation
Correct option: A
liver
Option A (liver) is correct because prolonged exposure to vinyl chloride is a known risk factor for liver cancer (specifically angiosarcoma).
77
Medium
77 of 259
Remembering
+4 | -1
Allergens are
View answer and explanation
Correct option: B
Non-infectious and increased secretion of IgE
Option B (Non-infectious and increased secretion of IgE) is correct because allergens are non-infectious substances that trigger an allergic response, leading to increased production of IgE antibodies.
78
Medium
78 of 259
Understanding
+4 | -1
The person showing unpredictable moods, outbursts of emotions, quarrelsome behaviour and conflicts with others is suffering from
View answer and explanation
Correct option: A
Schizophrenia
Option B (The antibodies produced in allergy are of IgE type) is correct because IgE antibodies are specifically involved in allergic reactions.
79
Easy
79 of 259
Remembering
+4 | -1
What is the main lymphoid organ where all blood cells including lymphocytes are produced?
View answer and explanation
Correct option: A
Bone marrow
Option A (Bone marrow) is correct because bone marrow is the primary lymphoid organ responsible for the production of all blood cells, including lymphocytes.
80
Medium
80 of 259
Understanding
+4 | -1
Short lived immunity acquired from mother to foetus across placenta or through mother’s milk to the infant is categorized as
View answer and explanation
Correct option: B
Passive immunity
Option B is correct. Passive immunity is acquired through the transfer of antibodies, such as from mother to fetus or infant.
81
Hard
81 of 259
Understanding
+4 | -1
Assertion (A): Western blotting and ELISA tests are used to detect HIV infection in human.
Reason (R): These two techniques use same genomic probes (RNA), which are found in HIV
Reason (R): These two techniques use same genomic probes (RNA), which are found in HIV
View answer and explanation
Correct option: C
Assertion is true but Reason is false
Option C is correct. Western blotting and ELISA are used to detect HIV, but they don't use the same genomic probes (RNA). ELISA detects antibodies, and Western blotting confirms the presence of viral proteins.
82
Medium
82 of 259
Analyzing
+4 | -1
Pick wrong out one?
View answer and explanation
Correct option: D
The body is able to differentiate self and non-self and the humoral immune response is responsible for the graft rejection
Option D is correct because while the body can differentiate self from non-self, the cell-mediated immune response, not the humoral response, is primarily responsible for graft rejection.
83
Medium
83 of 259
Understanding
+4 | -1
The best HLA(Human Leucocyte Antigen) match for transplants in order of preference is
View answer and explanation
Correct option: D
Twin> sibling> Parent> unrelated donor
Option D (Twin> sibling> Parent> unrelated donor) is correct because twins have identical HLA, siblings share a higher probability of HLA match than parents, and unrelated donors have the lowest probability.
84
Hard
84 of 259
Understanding
+4 | -1
Assertion : SCID is a primary immunodeficiency.
Reason : It is a serious congenital
immunodeficiency
Reason : It is a serious congenital
immunodeficiency
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because SCID is a primary immunodeficiency and it's a serious congenital condition.
85
Medium
85 of 259
Remembering
+4 | -1
Cross sectional image of internal body structure can be obtained by using which medical technique?
View answer and explanation
Correct option: C
CAT - Computerized Axial Tomography
Option C (CAT - Computerized Axial Tomography) is correct because CAT scans provide cross-sectional images of internal body structures.
86
Medium
86 of 259
Remembering
+4 | -1
Carries of Entamoeba histolytica are
View answer and explanation
Correct option: C
Musca domestica (housefly)
Option C (Musca domestica (housefly)) is correct because houseflies can mechanically transmit Entamoeba histolytica cysts, acting as carriers.
87
Hard
87 of 259
Remembering
+4 | -1
Leukaemia is caused by:
View answer and explanation
Correct option: B
Option B () is correct because Strontium-90 is a radioactive isotope that can accumulate in bone marrow and cause leukemia.
88
Medium
88 of 259
Understanding
+4 | -1
Assertion: Many visitors of hills suffer from skin
and respiratory allergy problem.
Reason: Conifer trees produce a large quantitiy
of wind-borne pollen grains.
and respiratory allergy problem.
Reason: Conifer trees produce a large quantitiy
of wind-borne pollen grains.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because conifer pollen is a common allergen in hilly areas.
89
Hard
89 of 259
Remembering
+4 | -1
Antibodies are
View answer and explanation
Correct option: A
Gamma globulins
Option A (Gamma globulins) is correct because antibodies are proteins belonging to the gamma globulin class of immunoglobulins, produced by plasma cells in response to an antigen.
90
Hard
90 of 259
Understanding
+4 | -1
Assertion : Paroxysms are regular and daily
in Quotidian malaria.
Reason : Recurrence of fever is after 48 hours if
the infection is caused by Plasmodium malariae.
in Quotidian malaria.
Reason : Recurrence of fever is after 48 hours if
the infection is caused by Plasmodium malariae.
View answer and explanation
Correct option: D
If both Assertion and Reason are false
Option D is correct because the assertion regarding quotidian malaria and the reason regarding Plasmodium malariae are both false.
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 259 questions