Which of the following is an occupational respiratory disorder?
a.
Anthracis
b.
Emphysema
c.
Botulism
d.
Silicosis
Correct Answer
Step-by-Step AI Explanation
Verified Method
Silicosis is an occupational respiratory disorder caused by inhalation of silica dust, commonly affecting workers in mines, quarries, and sandblasting industries. Emphysema is linked to smoking, botulism is a food-borne illness, and anthracis (anthrax) is a bacterial infection—none are classified as occupational respiratory disorders.
Q47mcq
Calcium is important in skeletal muscle contraction because it
a.
binds to troponin to remove the masking of active sites on actin for myosin.
Correct Answer
b.
prevents the formation of bonds between the myosin cross bridges and the actin filament.
c.
detaches the myosin head from the actin filament.
d.
activates the myosin ATPase by binding to it.
Step-by-Step AI Explanation
Verified Method
During muscle contraction, Ca²⁺ released from the sarcoplasmic reticulum binds to troponin (part of the troponin-tropomyosin complex). This causes a conformational change that moves tropomyosin away from the active sites on actin, allowing myosin cross-bridges to bind and initiate contraction.
Q48mcq
Which of the following gastric cells indirectly help in erythropoiesis?
a.
Chief cells
b.
Parietal cells
Correct Answer
c.
Goblet cells
d.
Mucous cells
Step-by-Step AI Explanation
Verified Method
Parietal (oxyntic) cells of the gastric mucosa secrete intrinsic factor, which is essential for the absorption of Vitamin B₁₂ in the ileum. Vitamin B₁₂ is required for erythropoiesis (RBC formation). Deficiency leads to pernicious anaemia. Thus, parietal cells indirectly help in erythropoiesis.
Q49mcq
Match the items given in Column I with those in Column II and select the correct option given below:
Column I — Column II
a. Fibrinogen — i. Osmotic balance
b. Globulin — ii. Blood clotting
c. Albumin — iii. Defence mechanism
a.
a-iii, b-ii, c-i
b.
a-ii, b-iii, c-i
Correct Answer
c.
a-i, b-iii, c-ii
d.
a-i, b-ii, c-iii
Step-by-Step AI Explanation
Verified Method
Fibrinogen is a plasma protein involved in blood clotting (converted to fibrin). Globulins include immunoglobulins and are involved in defence mechanisms. Albumin is the most abundant plasma protein and plays a major role in maintaining osmotic balance (oncotic pressure) of blood.
Q50mcq
Which of the following hormones can play a significant role in osteoporosis?
a.
Aldosterone and Prolactin
b.
Parathyroid hormone and Prolactin
c.
Estrogen and Parathyroid hormone
Correct Answer
d.
Progesterone and Aldosterone
Step-by-Step AI Explanation
Verified Method
Osteoporosis (loss of bone density) is significantly influenced by estrogen (whose decline post-menopause accelerates bone loss) and parathyroid hormone (which regulates calcium metabolism and can cause bone resorption when elevated). These two hormones are most directly linked to osteoporosis.
Q51mcq
Which of the following is an amino acid derived hormone?
a.
Epinephrine
Correct Answer
b.
Estriol
c.
Estradiol
d.
Ecdysone
Step-by-Step AI Explanation
Verified Method
Epinephrine (adrenaline) is derived from the amino acid tyrosine and is classified as an amino acid-derived (amine) hormone. Estriol, estradiol, and ecdysone are all steroid hormones derived from cholesterol.
Q52mcq
Which of the following structures or regions is incorrectly paired with its function?
a.
Medulla oblongata : controls respiration and cardiovascular reflexes.
b.
Corpus callosum : band of fibres connecting left and right cerebral hemispheres.
c.
Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.
d.
Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
Correct Answer
Step-by-Step AI Explanation
Verified Method
The limbic system is associated with emotions, memory, olfaction, and behaviour — not with controlling movement. The description 'consists of fibre tracts that interconnect different regions of brain; controls movement' better describes the cerebellum or the internal capsule. Hence option (d) is incorrectly paired.
Q53mcq
The transparent lens in the human eye is held in its place by
a.
ligaments attached to the ciliary body
Correct Answer
b.
smooth muscles attached to the ciliary body
c.
smooth muscles attached to the iris
d.
ligaments attached to the iris
Step-by-Step AI Explanation
Verified Method
The lens of the human eye is held in position by suspensory ligaments (zonule of Zinn) that are attached to the ciliary body. The ciliary muscles within the ciliary body change the tension of these ligaments to alter the shape of the lens during accommodation.
Q54mcq
Among the following sets of examples for divergent evolution, select the incorrect option:
a.
Forelimbs of man, bat and cheetah
b.
Eye of octopus, bat and man
Correct Answer
c.
Brain of bat, man and cheetah
d.
Heart of bat, man and cheetah
Step-by-Step AI Explanation
Verified Method
Divergent evolution results in homologous structures — same origin but different functions (e.g., forelimbs of vertebrates, brains and hearts of mammals). The eyes of octopus and vertebrates (bat, man) are analogous structures (same function, different origin) and represent convergent evolution, not divergent evolution. Hence option (b) is the incorrect example for divergent evolution.
Q55mcq
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
a.
Elephantiasis
Correct Answer
b.
Amoebiasis
c.
Ringworm disease
d.
Ascariasis
Step-by-Step AI Explanation
Verified Method
Elephantiasis (filariasis) is caused by the filarial worm Wuchereria bancrofti, transmitted by the Culex mosquito. The parasite causes chronic inflammation and blockage of lymphatic vessels, leading to swelling of the lower limbs and genitals.
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Which of the following characteristics represent 'Inheritance of blood groups' in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
a.
b, c and e
b.
a, c and e
c.
b, d and e
d.
a, b and c
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Which of the following characteristics represent 'Inheritance of blood groups' in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
a.
b, c and e
b.
a, c and e
c.
b, d and e
d.
a, b and c
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I — Column II
a. Eutrophication — i. UV-B radiation
b. Sanitary landfill — ii. Deforestation
c. Snow blindness — iii. Nutrient enrichment
d. Jhum cultivation — iv. Waste disposal
a.
a-ii, b-i, c-iii, d-iv
b.
a-i, b-ii, c-iv, d-iii
c.
a-iii, b-iv, c-i, d-ii
d.
a-i, b-iii, c-iv, d-ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Glycosuria i. Accumulation of uric acid in joints
b. Gout ii. Mass of crystallised salts within the kidney
c. Renal calculi iii. Inflammation in glomeruli
d. Glomerular nephritis iv. Presence of glucose in urine
a.
a-iii, b-ii, c-iv, d-i
b.
a-iv, b-i, c-ii, d-iii
c.
a-ii, b-iii, c-i, d-iv
d.
a-i, b-ii, c-iii, d-iv
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function) Column II (Part of Excretory System)
a. Ultrafiltration i. Henle's loop
b. Concentration of urine ii. Ureter
c. Transport of urine iii. Urinary bladder
d. Storage of urine iv. Malpighian corpuscle
v. Proximal convoluted tubule
a.
a-iv, b-v, c-ii, d-iii
b.
a-v, b-iv, c-i, d-iii
c.
a-v, b-iv, c-i, d-ii
d.
a-iv, b-i, c-ii, d-iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Proliferative Phase i. Breakdown of endometrial lining
b. Secretory Phase ii. Follicular Phase
c. Menstruation iii. Luteal Phase
a.
a-iii, b-ii, c-i
b.
a-iii, b-i, c-ii
c.
a-ii, b-iii, c-i
d.
a-i, b-iii, c-ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Tricuspid valve i. Between left atrium and left ventricle
b. Bicuspid valve ii. Between right ventricle and pulmonary artery
c. Semilunar valve iii. Between right atrium and right ventricle
a.
a-iii, b-i, c-ii
b.
a-ii, b-i, c-iii
c.
a-i, b-ii, c-iii
d.
a-i, b-iii, c-ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tricuspid valve
b. Bicuspid valve
c. Semilunar valve
Column II
i. Between left atrium and left ventricle
ii. Between right ventricle and pulmonary artery
iii. Between right atrium and right ventricle
a.
a-iii, b-i, c-ii
b.
a-ii, b-i, c-iii
c.
a-i, b-ii, c-iii
d.
a-i, b-iii, c-ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Tidal volume i. 2500 – 3000 mL
b. Inspiratory Reserve volume ii. 1100 – 1200 mL
c. Expiratory Reserve volume iii. 500 – 550 mL
d. Residual volume iv. 1000 – 1100 mL
a.
a-iii, b-ii, c-i, d-iv
b.
a-iv, b-iii, c-ii, d-i
c.
a-i, b-iv, c-ii, d-iii
d.
a-iii, b-i, c-iv, d-ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tidal volume
b. Inspiratory Reserve volume
c. Expiratory Reserve volume
d. Residual volume
Column II
i. 2500–3000 mL
ii. 1100–1200 mL
iii. 500–550 mL
iv. 1000–1100 mL
a.
a-iii, b-ii, c-i, d-iv
b.
a-iv, b-iii, c-ii, d-i
c.
a-i, b-iv, c-ii, d-iii
d.
a-iii, b-i, c-iv, d-ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Herbarium i. It is a place having a collection of preserved plants and animals.
b. Key ii. A list that enumerates methodically all the species found in an area with brief description aiding identification.
c. Museum iii. Is a place where dried and pressed plant specimens mounted on sheets are kept.
d. Catalogue iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
a.
a-i, b-iv, c-iii, d-ii
b.
a-iii, b-iv, c-i, d-ii
c.
a-ii, b-iv, c-iii, d-i
d.
a-iii, b-ii, c-i, d-iv
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
a.
Hydrilla
b.
Viola
c.
Banana
d.
Yucca
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