Question Bank | Bio-12, Ch-17

Here is a vast collection of objective and subjective questions in this question bank of biology 12, chapter 17. Following types of questions have been included here.

  • MCQs (Textbook Exercise)
  • MCQs (Previous Boards Essentials)
  • SQs Topic-wise (Previous Boards Essentials + Textbook Conceptuals)
  • LQs (Previous Boards Essentials)

You can find solutions to these questions from our publication, “An Insight Into Objective Biology-12”.

MCQs (Textbook Exercise)

Q. Each question has four possible answers. Tick the correct one.

01: The neuron net of hydra lacks:

(a) Neurons

(b) Dendrites

(c) Connections

(d) Direction of impulse flow

02: A nerve is a:  

(a) Collection of neurons

(b) Concentration of dendrites and axons

(c) Bundles of axons or dendrites of neurons

(d) Bundles of axons or dendrites bounded by connective tissue

03: Thyroid glands produce:  

(a) Thyroxines, T3 & T4, and calcitonin

(b) Calcitonin

(c) Tri-iodothyronine

(d) Tetraiodothyronine

04: What is the number of cranial and spinal nerves in man:  

(a) 12 and 31

(b) 24 and 62

(c) both ‘a’ and ‘b’

(d) None of the above

05: The one which is not related to others is:  

(a) Cretinism

(b) Myxedema

(c) Exophthalmic goiter

(d) Diabetes mellitus 

MCQs (Previous Boards Essentials)

Q. Each question has four possible answers. Tick the correct one.

01: In living things, the behavior activities occur at regular intervals which are called: (BWP-16)

(a) Diurnal rhythms                

(b) Circannual

(c) Biorhythms                       

(d) Orcadian

02: The unicellular organisms respond to change in: (SRG-22)

(a) Temperature                     

(b) Light Intensity

(c) Various chemicals             

(d) All a, b & c

03: Etiolated plants grow without: (BWP-18)

(a) Water                                

(b) Light

(c) CO2                                   

(d) CO3

04: Galls are growth on a plant that are induced by: (DGK-14)(RWP-19)

(a) Ticks                                 

(b) Protozoans

(c) Parasites                            

(d) Fungi

05: The plant hormone that inhibits the growth of lateral shoots is: (LHR-16)

(a) Cytokine                           

(b) Gibberellin

(c) Auxin                                

(d) Ethene

06: Promotes closing of Stomata under conditions of water stress: (BWP-14)

(a) Ethene                              

(b) Abscisic acid

(c) Gibberellins                      

(d) Cytokinins

07: Sometimes parthenocarpy is induced for commercial purposes as in tomato, peppers by adding: (GJR-19)

(a) Ethene                              

(b) Abscisic acid

(c) Gibberellins                      

(d) Cytokines

07: Fruit development without fertilization is called: (RWP-21)

(a) Vernalization                    

(b) Parthenogenesis

(c) Phenotype                         

(d) Dormancy

08: The plant hormone which inhibits growth and promotes bud dormancy is: (BWP-15)

(a) Auxin                                

(b) Gibberellins

(c) Cytokinins                        

(d) Abscisic acid

09: Apical dominance is plants occur due to higher concentration of: (RWP-17)

(a) Cytokinin                          

(b) Gibberellin

(c) Ethane                               

(d) Auxin

10: Inhibitory effect of lateral shoots is caused by: (SWL-22)

(a) Abscisic acid                     

(b) Gibberellin

(c) Ethane                               

(d) Auxin

11: Parthenocarpy is artificially induces by: (LHR-22)

(a) Cytokinin                          

(b) Auxin

(c) Ethane                               

(d) Abscisic Acid

12: Leaf Abscission is promoted by? (BWP-21)

(a) Cytokinin                          

(b) Auxin

(c) Ethane                               

(d) Abscisic Acid

13: Ethene induce flowering in: (LHR-14)(AJK-15)(DGK-21)

(a) Banana                              

(b) Rose

(c) Pine-apple                         

(d) Orange

14: Selective weed killer is: (BWP-17)(SWL-21)

(a) 2 – 4 D                             

(b) 1AA

(c) NAA                                 

(d) IPA

15: The hormone which inhibits root growth is: (DGK-17)

(a) Auxins                              

(b) Gibberellins

(c) Cytokinins                        

(d) Abscisic acid

16: Flowering is induced in pineapple by growth hormone called: (DGK-19)

(a) Auxins                               

(b) Gibberellins

(c) Cytokinin                          

(d) Ethene

17: The hormones which promote bolting of some rossete plants is known as:  (SWL-19)

(a) Auxins                               

(b) Gibberellins

(c) Cytokinin                          

(d) Ethene

18: Plant hormones, which are indole acetic acid or its variants are: (GJR-21)

(a) Auxin                                

(b) Gibberellins

(c) Ethene                               

(d) Abscisic acid

19: Nissl’s granules are group of: (LHR-16,21)

(a) Mesosomes                       

(b) Lysosomes

(c) Ribosomes                        

(d) Chromosomes

20: The cytoplasmic process/fibres which carry impulse towards cell body is called: (MLT-18)

(a) Dendron                           

(b) Axons

(c) Nissl’s granules                 

(d) Neurofibrils

21: The process conducting impulses away from the cell body are called: (RWP-16)

(a) Dendrites                          

(b) Dendron

(c) Nissl’s granules                 

(d) Axon

22: The structures which respond are called: (FSL-16)

(a) Effectors                            

(b) Nerves

(c) Receptors                          

(d) Sense organs

23: The sensation of pain is produced by: (LHR-15)(FSL-21)

(a) Chemoreceptors               

(b) Mechanoreceptors

(c) Photoreceptors                  

(d) Nociceptors

24: Nociceptors produce sensation of: (RWP-14)(MLT-14,17)(GJR-17)(BWP-19)

(a) Touch                                

(b) Warmth and cold

(c) Smell                                 

(d) Pain

25: The receptors for neurotransmitter molecules are found in: (DGK-22)

(a) Neurolemma                     

(b) Sarcolemma

(c) Presynaptic membrane      

(d) Post synaptic membrane

26: How many types of receptors are present in skin? (SRG-17)

(a) Three                                

(b) Six

(c) Five                                  

(d) Two

27: Which neurons have long axon? (BWP-17)

(a) Sensory                             

(b) Motor

(c) Associative                       

(d) Cell body

28: Neuroglial cells provide the neuron with: (RWP-17)

(a) Protection                         

(b) Support

(c) Locomotion                       

(d) Nutrition

29: Microscopic gap between the two neurons is called as: (LHR-16)

(a) Synapsis                            

(b) Synapse

(c) Collapse                            

(d) Preapse

30: Resting membrane potential of neuron is: (SRG-16)(RWP-18)

(a) 50 mv                               

(b) -60 mv

(c) -70mv                               

(d) -80mv

31: During non-conducting state, the neuron membrane is permeable to efflux of: (FSL-15)

(a) K+                                     

(b) Na+

(c) Ca+                                   

(d) Cl

32: In neurons the message is transmitted across synapse in the form of chemical messenger called: (DGK-15)

(a) Neurotransmitters             

(b) Communication

(c) Nerve impulse                  

(d) Synaptic vesicle

33: The processes conducting impulse away from the body is called: (SRG-21)

(a)   Dendron                           

(b)  Dendrites

(c)   Nissl’s granules                 

(d)  Axon

34: The neurotransmitter that lies outside the CNS is called:

(a)   Adrenaline                        

(b)  Serotonin

(c)   Dopamine                         

(d)  Acetylcholine

35: The number of spinal nerve in man is: (DGK-15)(SWL-19)(BWP-22)

(a)   24                                     

(b)  62

(c)   12                                     

(d)  31

36: Maximum speed of nerve impulse transmission is: (LHR-14)

(a)   100 m/s                             

(b)  110 m/s

(c)   120 m/s                             

(d)  130 m/s

37: In myelinated neurons, the impulse jumps from node to node is called: (SWL-14)

(a)   Saltatory impulse              

(b)  Nerve impulse

(c)   Synapse                            

(d)  Synapsis

38: Which animal has diffused nervous system? (GJR-18)(AJK-19)

(a)   Octopus                            

(b)  Earthworm

(c)   Planaria                             

(d)  Jelly fish

39: Diffused nervous system is found in: (MLT-15)

(a)   Poriferans                          

(b)  Platyhelminthes

(c)   Cnidarians                         

(d)  Synapsis

40: The receptors of planaria are sensitive to; (RWP-19)

(a)   Light and pressure             

(b)  Light, pressure and touch

(c)   Touch, pressure and chemicals    

(d)        Light pressure and chemicals

41: Hind brain includes the medulla, pons and: (AJK-16)

(a)   Cerebrum                         

(b)  Cerebellum

(c)   Thalamus                          

(d)  Amygdala

42: The part of brain which is best developed in birds: (LHR-21)

(a)   Cerebellum                       

(b)  Medulla

(c)   Hippocampus                   

(d)  Pons

43: The largest part of brain is: (DGK-15)(SWL-18)

(a)   Cerebellum                       

(b)  Cerebellum

(c)   Thalamus                          

(d)  Amygdala

44: Intelligence is under the control of: (RWP-22)

(a)   Cerebrum                         

(b)  Cerebellum

(c)   Thalamus                          

(d)  Hypothalamus

45: The part of human limbic system: (LHR-18)

(a)   Amygdala                         

(b)  Thalamus

(c)   Cerebrum                         

(d)  Pons

46: The human mid brain is: (LHR-15)

(a)   Reduced                            

(b)  Enlarged

(c)   Swollen                            

(d)  Broken

47: The cerebrospinal fluid (CPF) is similar in composition to:   (GJR-15)

(a)   Blood                                

(b)  Blood Plasma

(c)   Blood Serum                     

(d)  Blood proteins

48: The limbic system is located between thalamus and: (SRG-15)

(a)   Hypothalamus                  

(b)  Cerebellum

(c)   Cerebrum                         

(d)  Pons

49: All are related to medulla oblongata, except: (FSL-14)

(a)   Long term memory           

(b)  Breathing rate

(c)   Heart beat rate                  

(d)  Blood pressure

50: A nerve is: (DGK-14)

(a)   Collection of neutrons      

(b)  Bundle of axons or dendrites

(c)   Connection of dendrites   

(d)  Bundle of axon or dendrites bounded by connection

51: The structure of human brain that control sleep-wake cycle is: (GJR-17)

(a)   Amygdala                         

(b)  Hippocampus

(c)   Thalamus                          

(d)  Hypothalamus

52: In human, relay center is located in: (BWP-17)

(a)   Fore brain                         

(b)  Mid brain

(c)   Hind brain                        

(d)  Spinal cord

53: The structure in human brain which control hunger is: (MLT-17)(SWL-17)(FSL-19)

(a)   Amydgala                         

(b)  Hippocampus

(c)   Thalamus                          

(d)  Hypothalamus

54: In human pair of cranial nerves are: (FSL-17)

(a)   12                                     

(b)  14

(c)   16                                     

(d)  18

55: Excess thyroxine produces a disease called: (MLT-17)

(a)   Addison’s                          

(b)  Hippocampus

(c)   Thalamus                          

(d)  Hypothalamus

56: Alzheimer’s disease is: (LHR-17)(AJK-22)

(a)   Physical illness                 

(b)  Mental illness

(c)   Renal illness                     

(d)  Pulmonary illness

57: The onset of epilepsy is usually before age of: (SWL-16)(LHR-17)

(a)   10 years                            

(b)  20 years

(c)   30 years                            

(d)  40 years

58: Alzheimer’s disease is characterized by the decline in the function of: (DGK-16)

(a)   Brain                                 

(b)  Liver

(c)   Kidney                              

(d)  Stomach

59: To cure Parkinson’s disease dopamine producing cells could be grafted directly into the: (BWP-17)

(a)   Brain                                 

(b)  Liver

(c)   Bone marrow                    

(d)  Blood

60: Effective drug available for Parkinson’s disease is: (SRG-15)

(a)   Nicotine                            

(b)  GDNF

(c)   AZT                                   

(d)  L-dopa

61: Mental illness causes: (LHR-14)

(a)   Goiter                               

(b)  Anaemia

(c)   Alzheimer                         

(d)  Scurvy

62: Endocrine glands secrete: (GJR-14)

(a)   Hormones                         

(b)  Salts

(c)   Enzymes                           

(d)  Mucous

63: In microcephaly, the individuals are born with small: (MLT-21)

(a)   Skull                                 

(b)  Neck

(c)   Jaw                                    

(d)  Vertebrae

64: Thyroid gland produces: (DGK-22)

(a)   Calcitonin                         

(b)  Tri-iodo thyroxin

(c)   T3,T4 and calcitonin           

(d)  All a, b & c  

65: Excess thyroxin is produced in a condition called: (MLT-21)

(a)   Cretinism                          

(b)  Dwarfism

(c)   Grave`s disease               

(d)  Crushing disease

66: Adrenocorticotrophic Hormone is secreted by? (FSL-22)

(a)   Adrenal Gland                  

(b)  Hypothalamus

(c)   Pituitary Gland                  

(d)  Apomixis

67: Which hormone in male stimulates the production of testosterone?   (SWL-18)

(a)   TSH                                  

(b)  FSH

(c)   LTH                                  

(d)  ICSH

68: The hormone which suppresses ovulation is: (AJK-18)

(a)   Testosterone                     

(b)  Oestrogen

(c)   Progesterone                    

(d)  Gastrin

69: Which hormone is chemically steroid? (LHR-17)

(a)   ADH                                 

(b)  Corticosterone

(c)   Thyroxine                         

(d)  Insulin

70: Which Hormone is not a chemically steroid?

(a)   Oestrogen                         

(b)  Cortisone

(c)   Testosterone                     

(d)  Insulin

71: The corpus luteum secretes a hormone: (LHR-18)

(a)   Oxytocin                           

(b)  Progesterone

(c)   Oestrogen                         

(d)  Testosterone

72: Ovulation is induced by: (MLT-16)

(a)   FSH                                  

(b)  LH

(c)   Estrogen                            

(d)  Progesterone

73: Median lobe of pituitary gland secretes hormone: (GJR-16)

(a)   Gonadotrophic hormone  

(b)  Melanophore stimulating hormone

(c)   Antidiuretic hormone        

(d)  Somatotrophin

74: Antidiuretic Hormone is also called as: (LHR-22)

(a)   Oxytocin                           

(b)  Vasopressin

(c)   Androgen                          

(d)  Oestrogen

75: Alpha cells of pancreas secrete: (FSL-17)

(a)   Glucagon                          

(b)  Insulin

(c)   Pancreatic juice                

(d)  Secretin

76: Insulin and glucagon hormones are ________ in nature: (GJR-15)(AJK-21)

(a)   Carbohydrates                  

(b)  Proteins

(c)   Steroids                             

(d)  Polypeptides

77: A pair of adrenal glands is present on top of each: (DGK-17)

(a)   Ear                                    

(b)  Kidney

(c)   Eye                                   

(d)  Testis

78: Secretin is a hormone produced by: (RWP-17)

(a)   Liver                                 

(b)  Gut

(c)   Pancreas                           

(d)  Adrenals

79: The form of learning which involves a diminish of response to repeated stimuli: (GJR-17)

(a)   Imprinting                         

(b)  Habituation

(c)   Latent learning                  

(d)  Insight learning

80: Pavlov performed experiments on dogs to prove: (MLT-19)

(a)   Conditional reflex 1          

(b)  Habituation

(c)   Conditional reflex 2          

(d)  Imprinting

81: Rodents respond to alarm call by other in their group is an example of behavior termed as: (LHR-17)

(a)   Imprinting                         

(b)  Habituation

(c)   Conditioning                     

(d)  Latent learning

82: The simplest form of learning behavior is: (LHR-19)(MLT-17,19)

(a)   Imprinting                         

(b)  Habitation

(c)   Insight learning                 

(d)  Latent learning

83: Higher form of learning is the: (DGK-18)

(a)   Conditional reflex type I   

(b)  Imprinting

(c)   Insight learning                 

(d)  Latent learning



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