Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
a.
N2O5
Correct Answer
b.
NO
c.
N2O
d.
NO2
Step-by-Step AI Explanation
Verified Method
N2O5 is not a primary pollutant of significant concern relative to the others listed in standard environmental chemistry literature.
Q46mcq
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 cells secrete HCl, which converts ferric iron into absorbable ferrous iron necessary for erythropoiesis, and also secrete Intrinsic Factor for Vitamin B12 absorption.
Q47mcq
Match the items given in Column I with those in Column II and select the correct option given below: Column I (a) Fibrinogen (b) Globulin (c) Albumin vs Column II (i) Osmotic balance (ii) Blood clotting (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 involved in blood clotting (ii), Globulins are involved in defence mechanisms (iii), and Albumin is responsible for osmotic balance (i).
Q48mcq
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
Calcium ions bind to the troponin C subunit, causing a conformational change that moves tropomyosin away from the active binding sites on actin, allowing myosin cross-bridges to bind.
Q48mcq
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
Signal for contraction increases Ca++ levels in the sarcoplasm. Ca++ binds with the troponin sub-unit (troponin C), which is masking the active site on the actin filament, and displaces the troponin sub-unit. Once the active site is exposed, the myosin head attaches and initiates contraction.
Q49mcq
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 the inhalation of silica dust in industries like stone grinding or breaking. It leads to inflammation and fibrosis of the lungs.
Q50mcq
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 (a catecholamine) is derived from the amino acid tyrosine by the removal of a carboxyl group.
Q51mcq
Which of the following structures or regions is incorrectly paired with its functions?
a.
Medulla oblongata : controls respiration and cardiovascular reflexes.
b.
Corpus callosum : band of fibers 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 the 'emotional brain' involved in processing emotions and motivation, not in the control of physical movement.
Q52mcq
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 in the human eye is suspended and held in its proper position by suspensory ligaments, which are attached to the ciliary body.
Q53mcq
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
Estrogen inhibits osteoclasts and promotes osteoblasts; its deficiency leads to osteoporosis. Parathormone (PTH) promotes bone demineralization, and its excessive activity also causes osteoporosis.
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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. Proliferative Phase, b. Secretory Phase, c. Menstruation. Column II: i. Breakdown of endometrial lining, ii. Follicular Phase, 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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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:
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:
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.
(1) iii ii i iv
b.
(2) iv iii ii i
c.
(3) i iv ii iii
d.
(4) iii i iv ii
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Match the items given in Column I with those in Column II and select the correct option:
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:
Column I: a. Eutrophication, b. Sanitary landfill, c. Snow blindness, d. Jhum cultivation
Column II: i. UV-B radiation, ii. Deforestation, iii. Nutrient enrichment, iv. Waste disposal
a.
(1) ii i iii iv
b.
(2) i ii iv iii
c.
(3) iii iv i ii
d.
(4) i iii iv ii
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Match the items given in Column I with those in Column II and select the correct option:
Column I: a. Glycosuria, b. Gout, c. Renal calculi, d. Glomerular nephritis
Column II: i. Accumulation of uric acid in joints, ii. Mass of crystallised salts within the kidney, iii. Inflammation in glomeruli, iv. Presence of glucose in urine
a.
(1) iii ii iv i
b.
(2) iv i ii iii
c.
(3) ii iii i iv
d.
(4) i ii iii iv
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Match the items given in Column I with those in Column II and select the correct option:
Column I: a. Ultrafiltration, b. Concentration of urine, c. Transport of urine, d. Storage of urine
Column II: i. Henle's loop, ii. Ureter, iii. Urinary bladder, iv. Malpighian corpuscle, v. Proximal convoluted tubule
a.
(1) iv v ii iii
b.
(2) v iv i iii
c.
(3) v iv i ii
d.
(4) iv i ii 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 (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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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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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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What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g; Primary consumer : 60 g; Primary producer : 10 g
a.
Inverted pyramid of biomass
b.
Upright pyramid of biomass
c.
Upright pyramid of numbers
d.
Pyramid of energy
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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) Herbarium, (b) Key, (c) Museum, (d) Catalogue. Column II: (i) It is a place having a collection of preserved plants and animals, (ii) A list that enumerates methodically all the species found in an area with brief description aiding identification, (iii) Is a place where dried and pressed plant specimens mounted on sheets are kept, (iv) A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
a.
(i) (iv) (iii) (ii)
b.
(iii) (iv) (i) (ii)
c.
(ii) (iv) (iii) (i)
d.
(iii) (ii) (i) (iv)
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