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
SHORT QUESTIONS
LONG QUESTIONS
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