103 + Mcqs in AIIMS 2015 Page 2 McqOptions

51.	A colour blind man marry with a daughter of colour blind father, the generation will be
A.	there will be no daughter colour blind
B.	all sons will be colour blind
C.	all daughter will be colour blind
D.	half sons will be colour blind
Answer» E.

Discussion

52.	In the homeostatic control of blood sugar level, which organs function as modulator and effector respectively?
A.	Liver and islet of Langerhans
B.	Hypothalamus and liver
C.	Hypothalamus and islet of Langerhans
D.	Islet of Langerhans and hypothalamus
Answer» D. Islet of Langerhans and hypothalamus

Discussion

53.	The biological clock measures the length at each night by the
A.	relative amount of red absorbing and far-red absorbing phytochrome present at dawn
B.	amount of far-red absorbing phytochrome at dusk
C.	relative amount of red absorbing and far-red absorbing phytochrome at mid day
D.	rate at which are kind of phytochrome is converted to the other
Answer» B. amount of far-red absorbing phytochrome at dusk

Discussion

54.	Which of the following statement is incorrect regarding the band region of polytene chromosome?
A.	Feulgen negative area
B.	Absorb ultraviolet light at 2600 Å
C.	Chromonemata is tightly packed
D.	Stain intensity with basic stain
Answer» B. Absorb ultraviolet light at 2600 Å

Discussion

55.	Correct hormonal sequence in the case of menstruation as
A.	oestrogen, FSH, progesterone
B.	oestrogen, progesterone, FSH
C.	FSH, progesterone, oestrogen
D.	FSH, oestrogen, progesterone
Answer» E.

Discussion

56.	Node of Ranvier occurs where
A.	nerve is covered with myelin sheath
B.	neurilemma is discontinuous
C.	neurilemma and myelin sheath are discontinuous
D.	myelin sheath is discontinuous
Answer» E.

Discussion

57.	In old age, stiffness of joints is due to the
A.	hardening of bones
B.	inefficiency of muscles
C.	decrease in synvial fluid
D.	enlargement of bones
Answer» D. enlargement of bones

Discussion

58.	What is true of urea biosynthesis?
A.	Uric acid is starting point
B.	Urea is synthesized in lysosomes
C.	Urea cycle enzymes are located inside mitochondria
D.	Urea is synthesized in kidney
Answer» D. Urea is synthesized in kidney

Discussion

59.	Choose the statement.
A.	All proteins have 20 amino acids
B.	Both ends of a protein are similar
C.	All proteins are soluble
D.	Proteins are formed by peptide bonds
Answer» B. Both ends of a protein are similar

Discussion

60.	If a biochemical analysis of mitochondria has to done, the best procedure would be
A.	select cells which have a larger number of mitochondria
B.	plasmolyse the cell and filter out the mixture an take the debris
C.	grind the cells and filter out the mixture and take the debris
D.	subject the cell to cell fractionation (centrifuge) and obtain mitochondria
Answer» E.

Discussion

61.	Haversian canal in the bone of mammals are connected by small blood vessel canal called
A.	Schlemm’s canal
B.	Volkmann’s canal
C.	Portal capillaries
D.	Sinuses
Answer» C. Portal capillaries

Discussion

62.	Pollination in Rafflesia is occurred by
A.	Carion flies
B.	elephant
C.	bat
D.	crow
Answer» B. elephant

Discussion

63.	Pith cavity occurs in the stem of
A.	Helianthus
B.	Zea mays
C.	Cucurbita
D.	Dracaena
Answer» D. Dracaena

Discussion

64.	The small projections present on the surface of pineapple fruit represent
A.	persistent styles
B.	persistent stamens
C.	persistent calyx
D.	persistent bracts
Answer» E.

Discussion

65.	Which one of the following is referred as ‘living fossils’?
A.	Sarcoptes
B.	Daphnia
C.	Limulus
D.	Balanus
Answer» D. Balanus

Discussion

66.	Cestoda are distinguished from other flatworms by the absence by
A.	digestive system
B.	nervous system
C.	excretory system
D.	reproductive system
Answer» C. excretory system

Discussion

67.	viruses produce a thick covering and encyst themselves as endospores
A.	acoelomates
B.	invertebrates
C.	true coelomates
D.	echinoderms only
Answer» D. echinoderms only

Discussion

68.	The antibiotics have no effect on viruses because
A.	viruses show metabolism of their own
B.	viruses are too small in size for antibiotics to act upon them
C.	viruses show no metabolism of their own
D.	viruses produce a thick covering and encyst themselves as endospores
Answer» D. viruses produce a thick covering and encyst themselves as endospores

Discussion

69.	Assertion (A) Carbonate and hydroxide ores are concentrated by froth floatation process. Reason (R) In froth floatation process, mineral oil is used due to it preferentially wets the gangue particles.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false.
Answer» E.

Discussion

70.	Assertion (A) Neoprene can be further hardened by heating with the sulphur. Reason (R) It contains allylic double bond which help in introducing sulphur bridges between different polymer chains.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Discussion

71.	Assertion (A) Presence of green plant is essential for greenhouse effect. Reason (R) Chlorophyll of green plants causes greenhouse effect
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false.
Answer» E.

Discussion

72.	Assertion (A) Friedel-Crafts reaction benzene with n-propyl chloride on heating produce isopropyl benzene Reason (R) Benzene undergoes electrophilic substitution easily.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false
Answer» C. If Assertion is true but Reason is false

Discussion

73.	Assertion (A) A mixture of o-nitrophenol and p-nitrophenol can be separated by steam distillation. Reason (R) p-nitrophenol is steam volatile whereas o-nitrophenol is not steam volatile.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false.
Answer» D. If both Assertion and Reason and false.

Discussion

74.	Assertion (A) Sodium reacts with oxygen to form Na2O2 but potassium reacts with oxygen to form KO2. Reason (R) Potassium is more reactive metal than sodium.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false
Answer» C. If Assertion is true but Reason is false

Discussion

75.	Assertion (A) Graphite is a good conductor of heat and electricity. Reason (R) Graphite has all the electrons firmly held together in C―C σ- bonds.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false.
Answer» D. If both Assertion and Reason and false.

Discussion

76.	Assertion (A) Ranitidine is used to treat hyperacidity and brompheniramine is used to treat hypersensitivity. Reason (R) Both of these drugs are antihistamines.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false.
Answer» C. If Assertion is true but Reason is false.

Discussion

77.	Assertion (A) In comparison to ethyl chloride, it is not easy to carry out nucleophilic substitution on vinyl chloride. Reason (R) Vinyl group is an electron donating.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false
Answer» D. If both Assertion and Reason and false

Discussion

78.	Assertion (A) tert-butyl methyl ether on treatment with HI at 100℃ gives a mixture of methyl iodide and tert-butyl alcohol. Reason (R) This reaction occur via SN2 mechanism
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false.
Answer» E.

Discussion

79.	Assertion (A) A solution of sucrose in water is dextrorotatory while on hydrolysis inn presence of little hydrochloric acid, it becomes laevorotatory. Reason (R) Sucrose on hydrolysis gives unequal amounts of glucose and fructose as a result of which change in sign of rotation is observed.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false.
Answer» D. If both Assertion and Reason and false.

Discussion

80.	Assertion (A) Chlorine reacts more rapidly with H2 in comparison to D2. Reason (R) D―CL bond is stronger in comparison to H―Cl bond.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false
Answer» C. If Assertion is true but Reason is false.

Discussion

81.	Assertion (A) Elementary phosphorus exists in three principal allotropic forms, i.e. white (or yellow), red (or violet) and black. Reason (R) Of the three forms, white phosphorus is the most important and most reactive.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false.
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Discussion

82.	Assertion (A) Iron is protected from corrosion by connecting magnesium metal with it. Reason (R) Iron acts as cathode and magnesium as anode which gradually disappears.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false.
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Discussion

83.	Assertion (A) Gabriel phthalimide reaction can be used to prepare aryl and alkyl amines. Reason (R) Aryl halides have same reactivity as alkyl halides towards nucleophilic substitution reactions.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false
Answer» E.

Discussion

84.	Assertion (A) Osmotic pressure of 0.1 N urea solution is less than that of 0.1 M NaCl solution. Reason (R) Osmotic pressure is not a colligative property.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false.
Answer» D. If both Assertion and Reason and false.

Discussion

85.	Assertion (A) In any transition series, the magnetic moment of M2+ ion first increases and then decreases. Reason (R) In any transition series, the number of unpaired electrons first increases, afterward decrease.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason and false
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Discussion

86.	Assertion (A) Both Frenkel and Schottky defects are stoichiometric defects. Reason (R) Both defects change the density of the crystalline solid.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason and false.
Answer» D. If both Assertion and Reason and false.

Discussion

87.	Three spheres of the first layer and three of the second layer en the centre in a closest packing arrangement, this site is called
A.	interstitial void
B.	tetrahedral void
C.	octahedral void
D.	cubic void
Answer» D. cubic void

Discussion

88.	Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in the presence of dilute HCl. The compound so formed is converted int heated dry. The final product is
A.	2, 4, 6-tribromofluorobenzene
B.	1, 3, 5-tribromobenzene
C.	p-bromoaniline
D.	o-bromofluorobenzene
Answer» B. 1, 3, 5-tribromobenzene

Discussion

89.	100 mL of liquid A was mixed with 25 mL of liquid B, to give non solution of A-B. The volume of this mixture will be
A.	75 mL
B.	125 mL exact
C.	fluctuating between 75 mL to 125 mL
D.	close to 125 mL but not exceed that 125 mL
Answer» E.

Discussion

90.	Carbon and oxygen forms two compound. Carbon content in one of them is 42.9% while in the other is 27.3%. The give data is in support with
A.	law of definite proportions
B.	law of reciprocal proportions
C.	law of multiple proportions
D.	law of conservation of mass
Answer» D. law of conservation of mass

Discussion

91.	If the distance between Na+ and Cl− ions in sodium chloride crystal is y pm, the length of the edge of the c unit cell is
A.	4y pm
B.	y/4 pm
C.	y/2 pm
D.	2y pm
Answer» E.

Discussion

92.	Point out of the true statement.
A.	photochemical smog occurs in a day time while the classical smog occur in the morning hours
B.	Classical smog has an oxidizing character whereas the photochemical smog is reducing in character
C.	During formation of smog, the level of ozone in the atmosphere goes down
D.	Classical smog is good for health but not photochemical smog
Answer» D. Classical smog is good for health but not photochemical smog

Discussion

93.	Assertion (A) Audio signal of frequency 10 kHz cannot be transmitted over long distance without modulation. Reason (R) Length of the antenna required λ/4, should have practical value.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason are false.
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Discussion

94.	Assertion (A) A charge q is placed on a height h/4 above the centre of a square of side b. The flux associated with the square is independent of side length. Reason (R) Gauss’s law is independent of size of the Gaussian surface.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason are false.
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Discussion

95.	Assertion (A) A spherical equipotential surface is not possible for a point charge. Reason (R) A spherical equipotential surface is possible inside a spherical capacitor.
A.	If both Assertion and Reason are tru of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason are false.
Answer» E.

Discussion

96.	Assertion (A) Above Curie temper paramagnetic. Reason (R) When a magnetic material is heated to very high temperature, it loses its magnetic properties.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason are false
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Discussion

97.	Assertion (A) A particle of mass M at rest decay into two particles of masses m1 and m2, having non-zero velocities will have ratio of de-Broglie wavelengths unity. Reason (R) Here we cannot apply conservation of linear momentum.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason are false.
Answer» D. If both Assertion and Reason are false.

Discussion

98.	Assertion (A) The magnetic moment (μ) of an electron revolving around the nucleus decreases with increasing principle quantum number (n). Reason (R) Magnetic moment of the revolving electron, μ ∝ n.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false.
D.	If both Assertion and Reason are false.
Answer» E.

Discussion

99.	Assertion (A) In a meter bridge experiment, null point for an unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same p as before by decreasing the value of the standard resistance. Reason (R) Resistance of metal increases with increase in temperature.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason are false.
Answer» E.

Discussion

100.	Assertion (A) The relation among u, v and f for the spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature. Reason (R) The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.
A.	If both Assertion and Reason are true and Reason is correct explanation of Assertion
B.	If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.	If Assertion is true but Reason is false
D.	If both Assertion and Reason are false.
Answer» B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Discussion

Explore topic-wise MCQs in AIIMS MBBS.

A colour blind man marry with a daughter of colour blind father, the generation will be

In the homeostatic control of blood sugar level, which organs function as modulator and effector respectively?

The biological clock measures the length at each night by the

Which of the following statement is incorrect regarding the band region of polytene chromosome?

Correct hormonal sequence in the case of menstruation as

Node of Ranvier occurs where

In old age, stiffness of joints is due to the

What is true of urea biosynthesis?

Choose the statement.

If a biochemical analysis of mitochondria has to done, the best procedure would be

Haversian canal in the bone of mammals are connected by small blood vessel canal called

Pollination in Rafflesia is occurred by

Pith cavity occurs in the stem of

The small projections present on the surface of pineapple fruit represent

Which one of the following is referred as ‘living fossils’?

Cestoda are distinguished from other flatworms by the absence by

viruses produce a thick covering and encyst themselves as endospores

The antibiotics have no effect on viruses because

Assertion (A) Carbonate and hydroxide ores are concentrated by froth floatation process. Reason (R) In froth floatation process, mineral oil is used due to it preferentially wets the gangue particles.

Assertion (A) Neoprene can be further hardened by heating with the sulphur. Reason (R) It contains allylic double bond which help in introducing sulphur bridges between different polymer chains.

Assertion (A) Presence of green plant is essential for greenhouse effect. Reason (R) Chlorophyll of green plants causes greenhouse effect

Assertion (A) Friedel-Crafts reaction benzene with n-propyl chloride on heating produce isopropyl benzene Reason (R) Benzene undergoes electrophilic substitution easily.

Assertion (A) A mixture of o-nitrophenol and p-nitrophenol can be separated by steam distillation. Reason (R) p-nitrophenol is steam volatile whereas o-nitrophenol is not steam volatile.

Assertion (A) Sodium reacts with oxygen to form Na2O2 but potassium reacts with oxygen to form KO2. Reason (R) Potassium is more reactive metal than sodium.

Assertion (A) Graphite is a good conductor of heat and electricity. Reason (R) Graphite has all the electrons firmly held together in C―C σ- bonds.

Assertion (A) Ranitidine is used to treat hyperacidity and brompheniramine is used to treat hypersensitivity. Reason (R) Both of these drugs are antihistamines.

Assertion (A) In comparison to ethyl chloride, it is not easy to carry out nucleophilic substitution on vinyl chloride. Reason (R) Vinyl group is an electron donating.

Assertion (A) tert-butyl methyl ether on treatment with HI at 100℃ gives a mixture of methyl iodide and tert-butyl alcohol. Reason (R) This reaction occur via SN2 mechanism

Assertion (A) A solution of sucrose in water is dextrorotatory while on hydrolysis inn presence of little hydrochloric acid, it becomes laevorotatory. Reason (R) Sucrose on hydrolysis gives unequal amounts of glucose and fructose as a result of which change in sign of rotation is observed.

Assertion (A) Chlorine reacts more rapidly with H2 in comparison to D2. Reason (R) D―CL bond is stronger in comparison to H―Cl bond.

Assertion (A) Elementary phosphorus exists in three principal allotropic forms, i.e. white (or yellow), red (or violet) and black. Reason (R) Of the three forms, white phosphorus is the most important and most reactive.

Assertion (A) Iron is protected from corrosion by connecting magnesium metal with it. Reason (R) Iron acts as cathode and magnesium as anode which gradually disappears.

Assertion (A) Gabriel phthalimide reaction can be used to prepare aryl and alkyl amines. Reason (R) Aryl halides have same reactivity as alkyl halides towards nucleophilic substitution reactions.

Assertion (A) Osmotic pressure of 0.1 N urea solution is less than that of 0.1 M NaCl solution. Reason (R) Osmotic pressure is not a colligative property.

Assertion (A) In any transition series, the magnetic moment of M2+ ion first increases and then decreases. Reason (R) In any transition series, the number of unpaired electrons first increases, afterward decrease.

Assertion (A) Both Frenkel and Schottky defects are stoichiometric defects. Reason (R) Both defects change the density of the crystalline solid.

Three spheres of the first layer and three of the second layer en the centre in a closest packing arrangement, this site is called

Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in the presence of dilute HCl. The compound so formed is converted int heated dry. The final product is

100 mL of liquid A was mixed with 25 mL of liquid B, to give non solution of A-B. The volume of this mixture will be

Carbon and oxygen forms two compound. Carbon content in one of them is 42.9% while in the other is 27.3%. The give data is in support with

If the distance between Na+ and Cl− ions in sodium chloride crystal is y pm, the length of the edge of the c unit cell is

Point out of the true statement.

Assertion (A) Audio signal of frequency 10 kHz cannot be transmitted over long distance without modulation. Reason (R) Length of the antenna required λ/4, should have practical value.

Assertion (A) A charge q is placed on a height h/4 above the centre of a square of side b. The flux associated with the square is independent of side length. Reason (R) Gauss’s law is independent of size of the Gaussian surface.

Assertion (A) A spherical equipotential surface is not possible for a point charge. Reason (R) A spherical equipotential surface is possible inside a spherical capacitor.

Assertion (A) Above Curie temper paramagnetic. Reason (R) When a magnetic material is heated to very high temperature, it loses its magnetic properties.

Assertion (A) A particle of mass M at rest decay into two particles of masses m1 and m2, having non-zero velocities will have ratio of de-Broglie wavelengths unity. Reason (R) Here we cannot apply conservation of linear momentum.

Assertion (A) The magnetic moment (μ) of an electron revolving around the nucleus decreases with increasing principle quantum number (n). Reason (R) Magnetic moment of the revolving electron, μ ∝ n.

Assertion (A) The relation among u, v and f for the spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature. Reason (R) The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.