12th Class Biology Mcqs with Answers Chapter 17 | 2nd year Biology Mcqs With Answers

written by Assad Javaid | August 10, 2021

Chapter 17

Coordination And Control

Encircle the most appropriate answer among the following options

1. The name of metabolic processes are interwoven by choose which one is correct: 

  • In coordination
  • Subordination 
  • Coordination
  • All (A), (B) and (C) 

2. A cell or group of cells specialized to detect changes in the environment and  trigger impulses are know as choose which one is correct: 

  • Effectors
  • Receptors 
  • Suppressors
  • (B) and (C) 

3. The term Auxin was coined by choose which one is correct: 

  • T-yabuta 1970
  • F.W. Went 1926 
  • Walter 1928
  • Hoshimata 1910 

4. You duck your head when a baseball is thrown toward your face. You are  responding to choose which one is correct: 

  • An internal stimulus
  • An external stimulus 
  • Hormones
  • All of these 

5. A plant reponse to touch is called choose which one is correct: 

  • Photoperiodism
  • Geotropism 
  • Thigmotropism
  • Phototropism 

6. The biological clock is time measuring system which is independent and is choose which one is correct: 

  • Endogenous
  • Exogenous 
  • Both (A) and (B)
  • None of these 

7. If bio-rhythm occurs with a frequency of 24 hours, it is called choose which one is correct: 

  • Cireadian rhythm
  • Cirea-annual rhythm 
  • Lunar rhythm
  • All of the choices are correct 

8. Photosynthesis and luminescence in algae and dinoflagelltes, CO2 metabolism  in Bryophyulm are choose which one is correct: 

  • Dependent on light and temperature 
  • Exogenous in origin 
  • Independent of light and temperature 
  • All of the choices are correct 

9. The influence of daily cycle of light and darkness on the physiology and  behaviour of an organism is known as choose which one is correct: 

  • Mechanical rhythm
  • Chemoperiodism 
  • Photoperiodism
  • Thigmotropism 

10. The synthesis and release of abscisic acid in a plant is response to choose which one is correct: 

  • Water deficit
  • Oxygen deprivation 
  • Salt stress
  • Herbivory 

11. Cireadian rhythms are based on approximately a choose which one is correct: 

  • 2-hour period
  • 7-day period 
  • 24-hour period
  • 365-day period 

12. The production of fructants by plants is response to choose which one is correct: 

  • Water deficit
  • Salt stress 
  • Cold stress
  • Heat stress 

13. The formation of air tubes in submerged roots is an adaptation to choose which one is correct: 

  • Water stress
  • Oxygen deprivation 
  • Salt stress
  • Herbivory 

14. Which of the followings describes a plant response to heat stress? 

  • Production of heat shock proteins 
  • Closing of stomata 
  • Production of abscisic acid 
  • Production of fructants 

15. The first line of defense against pathogen is choose which one is correct: 

  • Gene for gene-recognition
  • Production of oligosaccharides 
  • Production of phytoalexins
  • Physical barrier of epidermis 

16. Auxin causes choose which one is correct: 

  • Promotion of apical dominance
  • Formation of adventitious roots 
  • Growth of fruit
  • All of the choices are correct 

17. In combination with auxin,it stimulates cell division in plants and determines  the course of differentiation choose which one is correct: 

  • Ethylene
  • Gibberellins 
  • Abscisic acid
  • Cytokinin 

18. Foolish seedling disease in rice is caused by choose which one is correct: 

  • Ethylene
  • Gibberellins 
  • Abscisic acid
  • Cytokinin 

19. One of the most important uses of auxin is the choose which one is correct: 

  • Initiation of abscission
  • Stimulation of abscission 
  • Prevention of abscission
  • Acceleration of abscission 

20. Abscisic acid choose which one is correct: 

  • Induces bud dormancy
  • Causes the stomata to close 
  • Promotes senescence
  • All of the choices are correct 

21. Which of the following is weedicide hormone choose which one is correct: 

  • Auxin
  • Gibberellin 
  • Abscisic acid
  • Ethylene 

22. Gibberellic acid was discovered by choose which one is correct: 

  • Hoshimata and Rappaport
  • Donoho and Walker 
  • Yabuta and Hayashi
  • Litrochet and Dolk 

23. Plants may be made to grow taller by applying the chemical choose which one is correct:

  • Dichlorophenoxy acetic acid
  • Trichlorophenoxy acetic acid 
  • Gibbereellic acid
  • Phosphon 

24. IAA, NAA, and GA are choose which one is correct: 

  • International seed companies
  • Plant pheromones 
  • Spray adjuvants
  • Plant hormones

25. Ethene choose which one is correct: 

  • Triggers ripening of fruit
  • Promotes leaf abscission 
  • Initiates flowering
  • All of the choices are correct 

26. The hormone responsible for delay of senescence is choose which one is correct: 

  • Ethene
  • Gibberellin 
  • Abscisic acid
  • Cytokinin 

27. The naturally occurring cytokinin is choose which one is correct: 

  • Zeatin
  • Kinetin 
  • Nepthalene acetic acid
  • Indole butyric acid 

28. Gibberellin choose which one is correct: 

  • Stimulate flowering
  • Promote bud sprouting 
  • Stimulate growth of pollen tube
  • All choices are correct 

29. Abscisic acid choose which one is correct: 

  • Is growth inhibitor
  • Produced during adverse conditions 
  • Induces seed dormancy
  • All of the choices are correct 

30. Which of the following is NOT function of auxin? 

  • Induces parthenocarpy
  • Promote apical sominance 
  • Promote abscission
  • All of the choices are correct 

31. Neurons which make up the nervous system,consist of choose which one is correct: 

  • An axon
  • 2 or more dendrites 
  • A cell body containing a nucleus
  • All (A), (B) and (C) 

32. Who send information from the sense organs to the C.N.S? 

  • Sensory neurons
  • Motor neurons 
  • Interneurons
  • Neuroglia 

33. Who send information from the C.N.S. to the effectors? 

  • Sensory neurons
  • Motor neurons 
  • Interneurons
  • Neuroglia 

34. Who connect different neurons together, send information between neurons.  Through short dendrites and short axons? 

  • Sensory neurons
  • Motor neurons 
  • Interneurons
  • Neuroglia 

35. Chemically, cortisone is choose which one is correct: 

  • A protein
  • A poly peptide 
  • An amino acid
  • A steroid 

36. Which of the following is not a function of sympathetic system? 

  • Dilates the branches
  • Accelerates the heart beat 
  • Inhibits the digestive tract
  • Contracts the pupils 

37. The very small gap between an axon sending a message and dendrite  receiving the message is the choose which one is correct: 

  • Axon terminal
  • Receptor 
  • Synapse
  • Effector 

38. Which part of neuron carries the signals away from the soma? 

  • Axon
  • Dendrite 
  • Transmitter
  • Synapse 

39. The neurons of CNS that form myelin sheath, provide nutrition and are  involved in phagocytic activity are know as choose which one is correct: 

  • Sensory neurons
  • Motor neurons 
  • Interneurons
  • Neuroglia 

40. It is an automatic neuromuscular action elicited by a defined stimulus choose which one is correct: 

  • Voluntary action
  • Reflex action 
  • Motor action
  • All of the choices are correct 

41. A reflex action involving one or more interneurons between sensory and  motor neuron is termed as choose which one is correct: 

  • Monosynaptic reflex
  • Polysynaptic reflex 
  • Hemisynaptic reflex
  • None of these 

42. Which of the ions are most abundant on the inside and outside of the neuron  at its resting potential? 

  • Potassium; sodium
  • Sodium; potassium 
  • Calcium; phosphate
  • Sulphate; potassium 

43. When a neuron reaches at action potential, it depolarizes in choose which one is correct: 

  • Second
  • Millisecond
  • Microsecond
  • Nanosecond 

44. Nerve impulses always travel to the brain through ⎯⎯⎯⎯⎯ fibers. 

  • Interneuron fibers
  • Dendrite fibers 
  • Axon fibers
  • Motor fibers 

45. Which of these is true when a neuron is at rest? 

  • The outside is positive
  • The outside is negative 
  • There is no voltage
  • The inside is positive 

46. The typical neuronal resting membrane potential measures between choose which one is correct: 

  • −40 mv to –80 mv
  • −30 mv to –80 mv 
  • −40 mv to –90 mv
  • −40 mv to –70 mv 

47. Influx of which ion causes depolarization of the membrane, as the first phase  of the action potential? 

  • K+
  • Na+
  • K+and Na+
  • Ca+

48. Diffused nervous system is present in which animal? 

  • Asymmetrical
  • Bilaterally symmetrical 
  • Radially symmetrical
  • All (A), (B) and (C) 

49. Central nervous system is present in which animal? 

  • Asymmetrical
  • Bilaterally symmetrical 
  • Radially symmetrical
  • All (A), (B) and (C) 

50. How many interneurons does the CNS contain approximately? 

  • 1 trillion
  • 100 trillion 
  • 1 million
  • 100 billion 

51. The brain stem is composed of choose which one is correct: 

  • The spinal cord, axon, vertebra
  • The cerebrum, cerebellum, pons 
  • The medulla, pons, mid brain
  • The thalamus, mid brain, pons 

52. Nerve cells can send messages faster if they have choose which one is correct: 

  • Many chromosomes
  • Non-myelinated axons 
  • May dendrites
  • Myelinated axon 

53. Which part of the brain is the seat of conscious activities? 

  • Limbic brain
  • Brain stem 
  • Cerebral cortex
  • Occipital 

54. A large number of bundle fibers that connect the left and right cerebral  hemispheres is choose which one is correct: 

  • Lateral sulcus
  • Broca’s area
  • Corpus callosum
  • Ventral sulcus 

55. The diencephalon consists of choose which one is correct: 

  • Thalamus and hypothalamus
  • Pons and medulla
  • Hypothalamus and limbic system
  • Thalamus and limbic system 

56. When your finger accidentally gets caught in a door, the pain message is sent  to your brain through choose which one is correct: 

  • Medulla oblongata
  • Motor nerve 
  • Sensory receptors
  • Caffeine 

57. Which of these is the large part of your brain? 

  • The cerebellum
  • The cerebrum 
  • The medulla
  • The pons 

58. The division of the peripheral nervous system that regulates your heart beat  is choose which one is correct:

  • The somatic system
  • The muscular system 
  • The autonomic system
  • The skeletal system 

59. The material in the brain and spinal cord which contains the axons and  myelin sheathes of nerve cells is choose which one is correct: 

  • White matter
  • Gary matter 
  • Yellow matter
  • None of these 

60. The material in the brain and spinal cord which contains the cell bodies and  dendrite of nerve cells is? 

  • Gray matter
  • White matter 
  • Brown matter
  • Yellow matter 

61. In which portion of the spinal cord do the interneurons lie? 

  • Cervical enlargement
  • Lumbar enlargement 
  • Gray matter
  • White matter 

62. The embryonic hindbrain gives rise to which structures in the brain? 

  • Cerebrum and basal ganglia 
  • Diencephalon 
  • Midbrain 
  • Cerebellum, pons and medulla oblongata 

63. Which portion of the brain maintains homeostasis by linking activities of the  endocrine and nervous system together? 

  • Thalamus
  • Hypotalamus 
  • Pons
  • Medulla oblongata 

64. Which of these nuclei is not located entirely within the medulla oblongata? 

  • Cardiac center
  • Respiratory center 
  • Vasomotor center
  • Reticular formation 

65. Which structures would not be innervated by the sympathetic nervous system? 

  • Skeletal muscles
  • Glands 
  • Smooth muscles
  • Cardiac muscles 

66. Which term should be last in the reflex sequence? 

  • Sensory neuron
  • Motor neuron 
  • Effector
  • Receptor 

67. Parkinson disease tremors are the result of which condition? 

  • Dopamine excess
  • Norepinephrine deficiency 
  • Epinephrine excess
  • Dopamine deficiency 

68. The centers for thermoregulation, osmoregulation, are located in choose which one is correct: 

  • Thalamus
  • Hypothalamus 
  • Amygdala
  • Hippocampus 

69. Which brain area acts to screen all incoming sensory data? 

  • Thalamus
  • Hypothalamus 
  • Cerebral cortex
  • Cerebellum 

70. Which brain area coordinates skeletal muscle movements? 

  • Thalamus
  • Hypothalamus 
  • Amygdala
  • Cerbellum 

71. It is involved in sleeping and wakening choose which one is correct: 

  • Thalamus
  • Brain stem 
  • Hippocampus
  • Cerebellum 

72. Peripheral nervous system in man consists of choose which one is correct: 

  • 31 spinal and 12 cranial nerve pairs 
  • 33 spinal and 12 cranial nerve pairs 
  • 12 spinal and 31 cranial nerve pairs 
  • 31 spinal and 31 cranial nerve pairs 

73. They detect sound, motion, position in relation to gravity, touch, pressure choose which one is correct: 

  • Chemoreceptors
  • Photoreeptors 
  • Mechanoreceptors
  • Nociceptors 

74. What kind of nociceptors are the skin receptors? 

  • Free nerve ending
  • Spray nerve endings 
  • Blind nerve ending
  • Encapsulated nerve ending 

75. What kind of meissner corpuscle and pacinian corpuscle are the skin  receptors? 

  • Free nerve ending
  • Hot
  • Cold
  • Encapsulated nerve ending 

76. The receptors which note the changes in blood pressure are choose which one is correct: 

  • Caloreceptors
  • Frigdoreceptors 
  • Baroreceptors
  • Nociceptors 

77. Dorsal root of spinal cord is choose which one is correct: 

  • Sensory
  • Motor 
  • Mixed
  • All (A), (B) and (C) 

78. The branch of the autonomic nervous system that induces the “flight or  fight” response is the choose which one is correct:

  • Sympathetic
  • Parasympathetic 
  • Vagus nerve
  • Somatic nerve 

79. Nicotine choose which one is correct: 

  • Reduces fatigue
  • Raises blood pressure   
  • Increases alertness
  • All of the choices are correct 

80. Parkinson’s disease is characterized by choose which one is correct:

  • Nicotin
  • Acetylcholine 
  • Serotonin
  • Dopamine 

81. Alzheimer disease (AD), is a progressive, degenerative brain disease. Its  symptoms include choose which one is correct: 

  • Dementia
  • Hallucination 
  • Delusions
  • All (A), (B) and (C) 

82. Endocrine glands typically choose which one is correct: 

  • Are ductless
  • Release enzymes
  • Release neurotransmitters
  • Release their contents out of the body 

83. Islets of Langerhans are found in the choose which one is correct: 

  • Thyroid
  • Thymus 
  • Panereas
  • Pituitary 

84. Cortisol is released from the choose which one is correct: 

  • Parathyroid
  • Adrenal cortex 
  • Hypothalamus
  • Posterior pituitary

85. Calcium is released from bone into the bloodstream due to the action of choose which one is correct: 

  • ADH
  • GnRH 
  • LH
  • PTH 

86. Aldosterone is produced by which gland that causes reabsorption choose which one is correct: 

  • Thyroik; sodium
  • Pituitary; water 
  • Adrenal; sodium
  • Thymus; white blood cells 

87. Blood calcium is lowered by the hormone choose which one is correct: 

  • Calcitonin
  • Glucagon 
  • Adrenalin
  • Thyroxine 

88. An oversecretion of GH (or STH) would lead to choose which one is correct: 

  • Goiter
  • Diabetes 
  • Infertility
  • Gigantism 

89. Which pair of hormones act antagonistically? 

  • Glucagon and Cortisol
  • Insulin and Adrenalin 
  • Glucagon and insulin
  • Glucagon and Adrenalin 

90. This hormone would be at an increased level in a mother who is breast  feeding choose which one is correct: 

  • Thyroxine
  • Prolactin 
  • Aldosterone
  • Insulin 

91. Compared to neurotransmitters, hormones act choose which one is correct: 

  • Faster
  • On fewer cells 
  • For a shorter period of time
  • Over longer distances 

92. Hormones are made from choose which one is correct: 

  • Amino acids
  • Modified amino acids 
  • Steroid
  • All of the choices are correct 

93. As the sun comes up in the morning your blood level of what goes down and  you wake up. 

  • Melatonin
  • Cortisol 
  • Glucagon
  • Adrenalin 

94. Which hormone is most commonly associated with the “fight or flight”  response to stress?

  • Insulin
  • Adrenalin 
  • Calcitonin
  • Prolactin 

95. These two hormones are produced by the hypothalamus but stored in the  posterior pituitary choose which one is correct: 

  • Insulin and glucagon
  • ADH and oxytocin 
  • Growth hormone and prolactin
  • Thymosin and adrenalin 

96. This hormone from the hypothalamus stimulates release of ACTH from the  anterior pituitary choose which one is correct: 

  • STHRRH
  • TRH
  • CRH
  • ACTH 

97. Thyroxin (or thyroid hormone) travels through the bloodstream acting on  many target cells to increase choose which one is correct: 

  • Blood sugar
  • Blood calcium 
  • Metabolism
  • Anti-inflammatory reactions 

98. The major target for ACTH is the choose which one is correct: 

  • Pancreas
  • Thyroid 
  • Liver
  • Adrenal 

99. Too much ACTH release causes hyperglycemia (high blood sugar) could also  cause choose which one is correct: 

  • Increased blood pressure
  • Increased blood calcium 
  • Decreased body temperature
  • Decreased metabolism 

100. A patient suffering from dwarfism is most likely deficient in choose which one is correct: 

  • ADH
  • PTH 
  • STH
  • GnRH 

101. A patient that is losing weight and suffering from an increased body  temperature could be hypersecreting choose which one is correct: 

  • Thyroxin
  • PTH 
  • STH
  • GnRH 

102. Hormones that enter target cells and bind to receptors in the cytoplasm and  then enter the nucleus are called choose which one is correct: 

  • Steroid hormones
  • Water soluble hormones 
  • Peptide hormones
  • Second messengers 

103. All of the following are hormones of the anterior pituitary except choose which one is correct: 

  • Human growth hormone (GH)
  • Follicle-stimulating hormone (FSH) 
  • Parathyroid hormone (PTH)
  • Thyroid-stimulating hormone (TSH) 

104. The gland which can be classified as an endocrine and an exocrine gland is  the choose which one is correct: 

  • Thyroid
  • Thymus 
  • Pancreas
  • Pituitary 

105. Excess level of cortisol results in choose which one is correct: 

  • Addison disease
  • Cretinism 
  • Cushing syndrome
  • Diabetes insipidus 

106. Hormone responsible for differentiation of Tlymphocytes is choose which one is correct: 

  • Cortisol
  • Melatonin 
  • Thyroxin
  • Thymosin 

107. A 30 years old male complains of being over weight, sluggish in nature, hair  loss, dry skin and intolerance of cold, he is suffering from  choose which one is correct: 

  • Cretinism
  • Myxedema 
  • Addison disease
  • Huntington disease 

108. The study of the natural history of animal behavior is choose which one is correct: 

  • Etiology
  • Psychology 
  • Ethology
  • Parapsychology 

109. Learning to not responding to a stimulus is called choose which one is correct: 

  • Imprinting
  • Sensitization
  • Kinesis
  • Habituation 

110. A “skinner box” is used for experiments in choose which one is correct:

  • Operant conditioning
  • Classical conditioning 
  • Migration
  • Aggression 

111. A sensitive phase and critical period are associated with what type of  behavior choose which one is correct: 

  • Kinesis
  • Taxis 
  • Imprinting
  • Habituation 

112. Dog salivating at the ringing of a bell is associated with what type of  behavior choose which one is correct: 

  • Classical conditioning
  • Operant conditioning 
  • Imprinting
  • Habityation 

113. Humans ignoring night sounds while asleep is an example of choose which one is correct: 

  • Classical conditioning
  • Operant conditioning 
  • Imprinting
  • Habituation 

114. A rat in a box learns to associate pressing a lever with obtaining food choose which one is correct: 

  • Operant conditioning
  • Classical conditioning 
  • Imprinting
  • Aggression 

115. An example of learned behaviorus choose which one is correct: 

  • Operant conditioning
  • Classical conditioning 
  • Latent learning
  • All (A), (B) and (C) 

116. The term imprinting was coined by choose which one is correct: 

  • Konard Lorenz
  • Ernest Haeckel 
  • Schwarz
  • T. H. Morgan 

117. Fixed action pattern (FAP) is stereotype behavior that is triggered by an  external sensory stimulus as choose which one is correct: 

  • Response chain
  • Endogenous releaser 
  • Sign stimulus
  • All (A), (B) and (C) 

118. Increased response to an increase in stimulus intensity is called choose which one is correct: 

  • Positive phototaxis
  • Kinesis 
  • Negative phototaxis
  • Luminis 

119. The animals which are active at dusk or dawn are termed as choose which one is correct: 

  • Nocturnal
  • Diurnal 
  • Crepuscular
  • Arboreal 

120. The set point of glucose blood level in your body is choose which one is correct: 

  • 90 mg / 100 ml
  • 50 mg / 100 ml 
  • 30 mg / 100 ml
  • 40 mg / 100 ml 

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