CBSE Class 12 Biology Human Health and Disease MCQs Set 05

Question. Vector for kala azar is:
(a) sandfly
(b) bedbug
(c) louse
(d) housefly

Answer: A

Question. Which of the following is a communicable disease?
(a) Malaria
(b) Diabetes
(c) Hypertension
(d) Kwashiorkar

Answer: A

Question. Mumps is a viral disease and painful swelling of
(a) parotid glands
(b) thyroid
(c) thymus
(d) sublingual glands

Answer: A

Question. Immunoglobulins are
(a) antigen
(b) antibodies
(c) antiseptics
(d) antibiotics

Answer: B

Question. Which of the following statements regarding drugs are correct ?
(i) Heroin, commonly called smack, is obtained by acetylation of morphine.
(ii) Cocaine is obtained from the latex of Papaver somniferum.
(iii) Marijuana interferes with the transmission of dopamine.
(iv) Morphine is an effective sedative and pain killer.
(a) (i) and (ii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (iii) and (iv)

Answer: B

Question. The toxic substance, ‘haemozoin’, related to the high fever and chill, is released during which of the following disease?
(a) Dengue
(b) Malaria
(c) Diphtheria
(d) Phenumonia

Answer: B

Question. The pathogens of genera, Microsporum, Trichophyton and Epidermorphyton are responsible for
(a) botulism
(b) conjunctivitis
(c) ringworms
(d) skin allergy

Answer: C

Question. Food poisoning is caused by
(a) Entamoeba histolytica
(b) Escherichia coli
(c) Clostridium botulinum
(d) Corynebacterium diphtheriae

Answer: C

Question. Which of the following is the correct statement regarding the particular psychotropic drug specified?
(a) Barbiturates cause relaxation and temporary euphoria
(b) Hashish causes after thought perceptions and hallucinations.
(c) Opium stimulates nervous system and causes hallucinations.
(d) Morphine leads to delusions and disturbed emotions.

Answer: B

Question. The following four statements (i – iv) kidney transplant.
Identify the two correct statements.
(i) Even if a kidney transplant is proper the recipient may need to take immuno suppresants for a long time.
(ii) The cell-mediated immune response is responsible for the graft rejection.
(iii) The B-lymphocytes are responsible for rejection of the graft.
(iv) The acceptance or rejection of a kidney transplant depends on the specific interferons.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iii)

Answer: A

Question. If you keep the sanitary system around yourself sound then the disease which will not most probably break out is :
(a) cholera
(b) malaria
(c) beri-beri
(d) scurvy

Answer: A

Question. Which of these may cause hypothermia in humans ?
(a) Smoking
(b) LSD
(c) Dopamine
(d) Alcohol consumption

Answer: D

Question. Which part of the brain is not affected by alcohol?
(a) Cerebrum
(b) Cerebellum
(c) Medulla oblongata
(d) Pons varolii

Answer: D

Question. Select the correct statement.
(a) Cocaine is given to patients after surgery as it stimulates recovery.
(b) Barbiturates when given to criminals make them tell the truth.
(c) Morphine is often given to persons who have undergone surgery as a pain killer.
(d) Chewing tobacco lowers blood pressure and heart rate.

Answer: C

Question. Refer the given figure showing the mode of action of AIDS virus and identify the sequences labelled as A, B, C and D.

(a) A – Viral DNA introduced into cell; B – Viral DNA; C – Viral DNA incorporates into host RNA; D – New viral RNA produced
(b) A – Viral RNA introduced into cell; B – Viral RNA;C – Viral DNA incorporates into host DNA; D – New viral DNA produced
(c) A – Viral RNA introduced into cell; B – Viral DNA; C – Viral DNA incorporates into host DNA; D – New viral RNA produced
(d) A – Viral DNA introduced into cell; B – Viral RNA; C – Viral RNA incorporates into host DNA; D – New viral DNA produced

Answer: C

Question. In which of the following disease, there is always a time lag between the infection and appearance of the symptoms of that particular disease?
(a) AIDS
(b) Allergy
(c) Cancer
(d) Alcoholism

Answer: A

Question. Infection of Ascaris usually occurs by
(a) eating imperfectly cooked pork.
(b) tse-tse fly.
(c) mosquito bite.
(d) drinking water containing eggs of Ascaris.

Answer: D

Question. To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?
(a) Physical barriers
(b) Cytokine barriers
(c) Cellular barriers
(d) Physiological barriers

Answer: D

Question. The diagram given below shows an antibody molecule with their parts labelled as A, B, C, D, E & F. Identify the part marked as A, B, C, D, E and F.

(a) A-Antigen binding site; B-Variable region (of L-Chain); C – Constant region (of L-Chain); D – Light polypeptide chain (L-Chain); E-Heavy polypeptide chain (H-Chain); F – Disulfide bond.
(b) A – Antigen binding site; B-Constant region (of L-Chain); C – Variable region (of L-Chain); D – Light polypeptide chain (L-Chain); E-Heavy polypeptide chain (H-Chain); F – Disulfide bond.
(c) A-Antigen binding site; B-Variable region (of L-Chain); C – Constant region (of L-Chain); D -Heavy polypeptide chain (L-Chain); E – Light polypeptide chain (H-Chain); F – Hydrogen bond
(d) A-Antigen binding site; B-Variable region (of L-Chain); C – Constant region (of L-Chain); D – Light polypeptide chain (L-Chain); E – Heavy polypeptide chain (H-Chain); F – Hydrogen bond

Answer: A

Question. A certain patient is suspected to be suffering from acquired immuno deficiency syndrome. Which diagnostic technique will you recommend for its detection?
(a) WIDAL
(b) ELISA
(c) MRI
(d) Ultrasound

Answer: B

Question. Hormone produced against allergic reaction is
(a) epinephrine
(b) nor-epinephrine
(c) glucocorticoid
(d) mineralocorticocoid

Answer: C

Question. At which stage of HIV infection does one usually show symptoms of AIDS?
(a) Within 15 days of sexual contact with an infected person.
(b) When the infecting retrovirus enters host cells.
(c) When viral DNA is produced by reverse transcriptase.
(d) When HIV replicates rapidly in helper T-lymphocytes and damages large number of these.

Answer: D

Question. Common cold differs from pneumonia in that
(a) pneumonia is caused by a virus while the common cold is caused by the bacterium Haemophilus influenzae.
(b) pneumonia pathogen infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs.
(c) pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease.
(d) pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no
effective vaccine.

Answer: B

Question. A person is injected with globulin against hepatitis. This is
(a) naturally acquired active immunity.
(b) naturally acquired passive immnity.
(c) artificially acquired active immunity.
(d) artificially acquired passive immunity.

Answer: C

Question. The best HLA (human leukocyte antigen) match for transplants in order of preference is
(a) sibling > twin > parent > unrelated donor
(b) twin > unrelated donor > parent > sibling
(c) twin > sibling > parent > unrelated donor
(d) sibling > parent > twin > unrelated donor

Answer: C

Question. The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of
(a) Rhizopus, a mould
(b) Ascaris, a round worm
(c) Taenia, a tapeworm
(d) Wuchereria, a filarial worm

Answer: D

Question. Which of the following statement is correct regarding the number of helper T cells and the viral concentration in the blood?
(a) As the number of HIV increase, so do the numbers of helper T cells.
(b) As the number of HIV increase, the number of helper T cells decreases.
(c) As the concentration of HIV decreases, the number of helper T cells increases.
(d) There is no relationship between the concentration of HIV and the number of helper T cells.

Answer: C

Question. In alcoholics, liver gets damaged as it
(a) secretes more bile.
(b) stores excess of glycogen.
(c) accumulates excess of fats.
(d) all of the above.

Answer: C

Question. What is common between mumps, cholera and TB ?
(a) They are all bacterial diseases.
(b) They are all endemic diseases.
(c) They are all viral diseases.
(d) They are all communicable diseases.

Answer: D

Question. 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.
(a) (i) and (iii) only
(b) (ii), (iii) and (v) only
(c) (ii), (iii), (iv) and (v) only
(d) (i), (ii), (iv) and (v) only

Answer: A

Matching Type Questions

Question. Which one of the following is not correctly matched ?
(a) Culex pipiens – Filariasis
(b) Aedes aegypti – Yellow fever
(c) Female Anopheles – Leishmaniasis
(d) Glossina palpalis – Sleeping sickness

Answer: C

Question. Which one of the following is the correct match for diseases and its causative agents ?
(a) AIDS – Bacillus
(b) Syphilis – Treoponema pallidum
(c) Malaria – Trypanosoma
(d) Gonorrhoea – Virus

Answer: B