Here is important Biology Class 12th important Solved MCQs Chapter 1 Homeostasis. Student get excellent Grades in Board Matric exam after preparation Online Biology Quiz. Biology Multiple Choice Questions.
Multiple Choice Questions 2nd Year
MCQs Biology F.Sc. Part 2
Chapter No.15 Homeostasis
Best MCQs for Entry Test MDCAT, ECAT & Pakistan Medical Commission
Total MCQs = 50
51. The entry of water from salty soil into roots of halophytes takes place because the root of halophytes develop:
(A) High water potential
B) Low osmotic pressure
(C) Low water potential
(D) All of these
Answer:
(C) Low water potential
52. Animals that do not adjust their internal osmoregularity and are isotonic with their environment are:
(A) Osmoconformcrs
(B) Osmoregulators
(C) Thermoregulators
(D) Thermoconfermors
Answer:
(A) Osmoconformcrs
53. Animals that are not isotonic with their environment and have developed mechanisms to regulate their internal solute and water concentrations are:
(A) Osmoconformers
(B) Osmoregrulators
(C) Thermoregualtors
(D) Both (A) and (B)
Answer:
(B) Osmoregrulators
55. An increase in blood sugar level triggers the release of the hormone insulin b the pancreas, the hormone insulin lowers blood sugar level restoring the body to its original blood glucose level by converting glucose to glycogen.
This is an example of:
(A) Positive feed back
(B) Negative feed back
(C) Homeostatic imbalance
(D) None of these
Answer:
(B) Negative feed back
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2nd Year Biology MCQs F.Sc. Part 2
Chapter No.15
Homeostasis
Total MCQs = 50
56. A fish in fresh water:
(A) Produces dilute urine
(B) Have a hypertonic body
(C) Produces concentrated urine
(D) (A) and (B)
Answer:
(D) (A) and (B)
57. To hags Fishes, Sea water is:
(A) Isotonic
(B) Hypotonic
(C) Hypertonic
(D) None of these
Answer:
(A) Isotonic
58. A fish in marine water:
(A) Produces concentrated urine
(B) Have a hypotonic body
(C) Produces dilute urine
(D) (A) and (B)
Answer:
(D) (A) and (B)
59. Metabolic water is:
(A) Water outside the cells of animals
(B) Produced by oxidation of fats
(C) sefill to desert mammals
(D) (B) and (C)
Answer:
(D) (B) and (C)
60. Plants do not excrete ammonia, urea and uric acid because:
(A) They lack nitrogenous caste
(B) Their metabolism is protein based
(C) Their nitrogenous products are recycled
(D) All
Answer:
(C) Their nitrogenous products are recycled
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MCQs Biology F.Sc. Part 2 (2nd Year)
Chapter No.15
HomeoStasis
61. Plants excrete:
(A) Excess water
(B) Excess oxygen
(C) Excess carbon dioxide
(D) All
Answer:
(D) All
62. Which one of the following has maximum toxicity?
(A) Ammonia
(B) Urea
(C) Uric acid
(D) Creatinine
Answer:
(A) Ammonia
63. Which one of the following has medium toxicity?
(A) Ammonia
(B) Urea
(C) Uric acid
(D) Water
Answer:
(A) Ammonia
64. Which one of the following has least toxicity?
(A) Ammonia
(b) Urea
(C) Uric acid
(D) All are highly toxic
Answer:
(C) Uric acid
65. Guttation take place through:
(A) Stomata
(C) Lenticels
(b) injured tissue
(d) Hydathodes
Answer:
(d) Hydathodes
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2nd Year Biology MCQs F.Sc. Part 2
Chapter No.15
Homeostasis
Total MCQs = 50
66. The excretory organs of Planaria are known as:
(A) Protonephridia
(B) Flame cells
(C) Both (A) and (B)
(D) Metanephriclia
Answer:
(C) Both (A) and (B)
67. Tubular excretory system of earth worm consists of
(A) Protonephridia
(B) Coxal gland
(C) Malpighian tubules
(D) Metanephridia
Answer:
(D) Metanephridia
68. The internal opening of the metanephridium is knows as:
(A) Nephrostoms
(B) (B) Nephridiopore
(C) Excretory pore
(D) All
Answer:
(A) Nephrostoms
69. Liver Synthesizes:
(A) Non-essential aminoacids
(B) Plasma
(C) Cholesterol
(D) All
Answer:
(D) All
70. In humans, excess nitrogen is eliminated form the body by mainly converting it to:
(A) Urea
(B) Uric acid
(C) Ammonia
(D) Amine phosphate
Answer:
(A) Urea
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MCQs Biology F.Sc. Part 2 (2nd Year)
Chapter No.15
HomeoStasis
71. The liver is:
(A) Smallest internal organ
(B) Medium-sized internal organ
(C) Body s largest internal organ
(D) All options are incorrect
Answer:
(C) Body s largest internal organ
72. The three major body fuels managed by the liver are:
(A) Protein, vitamins and minerals
(B) Carbohydrate, fat and protein
(C) Glucose, fructose and sucrose
(D) Glucose, iron and protein
Answer:
(B) Carbohydrate, fat and protein
73. Pigments found in bile are formed during catabolism:
(A) Haem catabolism
(B) Globin catabolism
(C) Cholesterol catabolism
(D) Both (A) and (C)
Answer:
(A) Haem catabolism
74. The nephron is:
(A) The site of urine storage
(B) Globin catabolism
(C) The site where ADH is produced
(D) Also called the “Bowman’s capsule”
Answer:
(B) Globin catabolism
75. From the distal convoluted tubule, filtrate will be carried to the:
(A) Renal corpuscle
(B) Collecting duct
(C) Nephron loop
(D) Proximal convoluted tubule
Answer:
(B) Collecting duct
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2nd Year Biology MCQs F.Sc. Part 2
Chapter No.15
Homeostasis
Total MCQs = 50
76. All of the following are normally found in urine except:
(A) Sodium ions
(B) Uric acid
(C) Creatinine
(D) Glucose
Answer:
(D) Glucose
77. Hormone regulates the transfer of sodium from the nephron to the blood:
(A) Parathomione
(B) Anti-diuretic
(C) Aldosterone
(D) Vasopression
Answer:
(C) Aldosterone
78. Conversion of ammonia into urea, occurs in:
(A) Kidneys
(B) Lungs
(C) Intestine
(D) Liver
Answer:
(D) Liver
79. Separation of amino acid into amino and carboxyl group is know as:
(A) Amination
B) Excretion
(C) Dear nation
(D) Egestion
Answer:
(C) Dear nation
80. Uric acid is the chief nitrogenous waste material in the excretory system of:
(A) Reptiles
(B) Birds
(C) Insects
(D) All of these
Answer:
(D) All of these
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MCQs Biology F.Sc. Part 2 (2nd Year)
Chapter No.15
HomeoStasis
81. Which of the following is not structure of kidney:
(A) Cortex
(B) Medulla
(C) Pelvis
(D) Urethra
Answer:
(D) Urethra
82. In mammalian kidney, the pyramids are seen in:
(A) Cortex
(B) Medulla
(C) Pelvis
(D) Hilus
Answer:
(B) Medulla
83. The number of nephrons in ONE kidney of man is:
(A) 4 million
(B) 2 million
(C) 8 million
(D) 1 million
Answer:
(D) 1 million
84. ADH increases ___________ of____________from the collecting duct:
(A) Absorption, sodium
(B) Diffusion, chlorine
(C) Absorption, water
(D) Diffusion, Ammonia
Answer:
(C) Absorption, water
85. Two counter-current systems are formed in the kidney by the:
(A) Henle’s loop and PCT
(B) Henle’s loop and DCT
(C) Henle’s loop and collecting duct
(D) Henle’s loop and vasa rectae
Answer:
(D) Henle’s loop and vasa rectae
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2nd Year Biology MCQs F.Sc. Part 2
Chapter No.15
Homeostasis
Total MCQs = 50
86. Cholesterol is excreted in the:
(A) Sebum
(B) Bile
(C) Sweat
(D) Both (A and (B)
Answer:
(B) Bile
87. Malpighian body is composed of
(A) Bowman s capsule only
(B) Glomerulus only
(C) Bowman’s capsule & Glomerulus
(D) Henle’s loop and vasa rectae
Answer:
(C) Bowman’s capsule & Glomerulus
88. Daily urine output of man is:
(A) 1-2 liters
(B) 1-3 liters
(C) 1-4 liters
(D) 1-5 liters
Answer:
(A) 1-2 liters
89. Tubular structure which carries urine from bladder to outside:
(A) Ureter
(B) Hilus
(C) Pelvis
(D) Urethra
Answer:
(D) Urethra
90. Ultrafiltration occurs in:
(A) Bowman s capsule
(B) Proximal convoluted tube
(C) Henle s loop
(D) Distal convoluted tube
Answer:
(A) Bowman s capsule
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MCQs Biology F.Sc. Part 2 (2nd Year)
Chapter No.15
HomeoStasis
91. The greater the demand of conserving water, the greater would be the number of:
(A) Juxta-medullary nephrons
(B) Cortical nephrons
(C) Capillaries of glomerulus
(D) Both (A) and (B)
Answer:
(A) Juxta-medullary nephrons
92. Each kidney is enclosed by a thin membranous covering called:
(A) Peritonium
B) Peritreme
(C) Perizonium
D All
Answer:
(A) Peritonium
93. Ph of human urine is
(A) 7.4
(B) 3.5
(C) 5.00
(D) 8.00
Answer:
(C) 5.00
94. The hormone which increases the reabsorption of calcium ions in nephron is:
(A) Aldosterone
(B) Parathormone
(C) Anti-diuretic
(D) Vasopression
Answer:
(B) Parathormone
95. The process by which some poisonous substances are secreted from peritubular capillaries into nephric filtrate is termed as:
(A) Tubular reabsorption
(B) Tubular secretion
(C) Counter-current exchange
(D) None of these
Answer:
(B) Tubular secretion
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2nd Year Biology MCQs F.Sc. Part 2
Chapter No.15
Homeostasis
Total MCQs = 50
96. It is a cyclic process of enzymatic reactions which operates in the liver cells as a result of which urea is formed from ammonia, carbondioxide and NH2 group:
(A) Ornithine cycle
(B) Citruline cycle
(C) Arginine cycle
(D) All of these
Answer:
(A) Ornithine cycle
98. Blood enters the kidney through a branch of aorta called:
(A) Afferent arteriole
(B) Renal artery
(C) Efferent arteriole
(D) Renal vein
Answer:
(B) Renal artery
99. A capillary tuft from which fluid leaves the circulatory system:
(A) Bowman capsule
(B) Proximal convoluted tube
(C) Glomerulus
(D) Loop of Henle
Answer:
(C) Glomerulus
100. In ectotherms and endotherms heat can be lost through:
(A) Evaporation
(B) Radiation
(C) Convection
(D) All
Answer:
(D) All
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