Micro-organisms present in the soil
Correct Answer
b.
Oceans
c.
Plants
d.
Haemoglobin
Step-by-Step AI Explanation
Verified Method
Micro-organisms present in the soil act as a natural sink for carbon monoxide (CO) by oxidizing it.
Q17mcq
Mixture of chloroxylenol and terpineol acts as
a.
Antiseptic
Correct Answer
b.
Antipyretic
c.
Antibiotic
d.
Analgesic
Step-by-Step AI Explanation
Verified Method
The mixture of chloroxylenol and terpineol is a well-known antiseptic, commonly used in Dettol.
Q46mcq
A decrease in blood pressure/volume will not cause the release of
a.
Atrial Natriuretic Factor
Correct Answer
b.
Aldosterone
c.
ADH
d.
Renin
Step-by-Step AI Explanation
Verified Method
ANF is released in response to an increase in blood pressure/volume to cause vasodilation, whereas renin, aldosterone, and ADH are released during a decrease.
Q48mcq
A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?
a.
Canines
b.
Pre-molars
Correct Answer
c.
Molars
d.
Incisors
Step-by-Step AI Explanation
Verified Method
The primary dentition (milk teeth) consists of 20 teeth. Premolars are absent in the primary dentition of children.
Q49mcq
Which of the following statements is correct?
a.
The descending limb of loop of Henle is impermeable to water
b.
The ascending limb of loop of Henle is permeable to water
c.
The descending limb of loop of Henle is permeable to electrolytes
d.
The ascending limb of loop of Henle is impermeable to water
Correct Answer
Step-by-Step AI Explanation
Verified Method
The descending limb of the loop of Henle is permeable to water but impermeable to electrolytes, while the ascending limb is impermeable to water but permeable to electrolytes.
Q50mcq
Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?
a.
Only (a)
b.
(a), (c) and (d)
c.
(b) and (c)
d.
Only (d)
Correct Answer
Step-by-Step AI Explanation
Verified Method
The nucleus degenerates during maturation of human RBCs, providing more internal space for the oxygen-carrying pigment, haemoglobin.
Q51mcq
An important characteristic that Hemichordates share with Chordates is
a.
Ventral tubular nerve cord
b.
Pharynx with gill slits
Correct Answer
c.
Pharynx without gill slits
d.
Absence of notochord
Step-by-Step AI Explanation
Verified Method
Pharyngeal gill slits are a shared characteristic between hemichordates and chordates. Notochord is unique to chordates.
Q51mcq
An important characteristic that Hemichordates share with Chordates is
a.
Ventral tubular nerve cord
b.
Pharynx with gill slits
Correct Answer
c.
Pharynx without gill slits
d.
Absence of notochord
Step-by-Step AI Explanation
Verified Method
Pharyngeal gill slits are present in both hemichordates and chordates. Notochord is unique to chordates, and a ventral tubular nerve cord is characteristic of non-chordates.
Q52mcq
Alexander Von Humboldt described for the first time
a.
Laws of limiting factor
b.
Species area relationships
Correct Answer
c.
Population Growth equation
d.
Ecological Biodiversity
Step-by-Step AI Explanation
Verified Method
Alexander Von Humboldt observed that within a region, species richness increases with increasing explored area.
Q52mcq
Alexander Von Humboldt described for the first time
a.
Laws of limiting factor
b.
Species area relationships
Correct Answer
c.
Population Growth equation
d.
Ecological Biodiversity
Step-by-Step AI Explanation
Verified Method
Alexander Von Humboldt observed that within a region, species richness increases with an increase in exploration area.
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Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation :
a.
X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends
b.
X = 24, Y = 7 True ribs are dorsally attached to vertebral column but are free on ventral side
c.
X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side
d.
X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum
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Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
a.
Chromosomes will be fragmented
b.
Chromosomes will not segregate
c.
Recombination of chromosome arms will occur
d.
Chromosomes will not condense
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The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?
a.
3 genotypes ; 4 phenotypes
b.
4 genotypes ; 3 phenotypes
c.
4 genotypes ; 4 phenotypes
d.
3 genotypes ; 3 phenotypes
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Match the following sexually transmitted diseases (Column - I) with their causative agent (Column - II) and select the correct option.
Column - I Column - II
(a) Gonorrhea (i) HIV
(b) Syphilis (ii) Neisseria
(c) Genital Warts (iii) Treponema
(d) AIDS (iv) Human Papilloma virus
a.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
b.
(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
c.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
d.
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
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Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
a.
Pseudomonas
b.
Mycoplasma
c.
Nostoc
d.
Bacillus
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If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
a.
11
b.
33
c.
333
d.
1
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If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
a.
11
b.
33
c.
333
d.
1
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Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
a.
Cell-mediated immune response
b.
Hormonal immune response
c.
Physiological immune response
d.
Autoimmune response
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Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
a.
Cell-mediated immune response
b.
Hormonal immune response
c.
Physiological immune response
d.
Autoimmune response
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Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements:
(a) Vitamin A derivatives are formed from carotene
(b) The photopigments are embedded in the membrane discs of the inner segment
(c) Retinal is a derivative of vitamin A
(d) Retinal is a light absorbing part of all the visual photopigments
a.
(a), (c) & (d)
b.
(a) & (c)
c.
(b), (c) & (d)
d.
(a) & (b)
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Frog's heart when taken out of the body continues to beat for some time. Select the best option from the following statements:
(a) Frog is a poikilotherm
(b) Frog does not have any coronary circulation
(c) Heart is 'myogenic' in nature
(d) Heart is autoexcitable
a.
Only (d)
b.
(a) & (b)
c.
(c) & (d)
d.
Only (c)
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Frog's heart when taken out of the body continues to beat for some time. Select the best option from the following statements:
(a) Frog is a poikilotherm
(b) Frog does not have any coronary circulation
(c) Heart is "myogenic" in nature
(d) Heart is autoexcitable
a.
Only (d)
b.
(a) & (b)
c.
(c) & (d)
d.
Only (c)
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