Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 Que- Joint between two parietal bones, which is infact immovable one is an example of 

a. Fibrous joints. 

b. Cartilaginous joints. 

c. Synovial joints. 

d. None of these 


Answer- Fibrous joints.


Que- Fibrous capsule surrounding synovial joints may be thickened at some places to form: 

a. Synovial membrane. 

b. Ligaments. 

c. Muscles. 

d. Tendon 


Answer- Ligaments.


Que- In which of the following joint muscles are arranged in the same plane as that of joint? 

a. Between radius and ulna. 

b. Between ulna and scapula 

c. Between humerus and scapula 

d. Between femur and tibia. 


Answer- Between femur and tibia.


Que- Which of the following hormone is predominantly responsible for bone weakening in older women? 

a. Progesterone. 

b. Oestrogen. 

c. Parathyroid hormone. 

d. Calcitonin. 


Answer- Oestrogen.


Que- Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency: 

a. Hypocalcaemia Tatanic spasms. 

b. Osteomalacis. 

c. Rickets. 

d. Tetany 


Answer- Rickets.


Que- Which of the following statement about osteoporosis is incorrect. 

a. It results from estrogen deficiency. 

b. Bone eating process takes over bone formation process. 

c. There is reduction of bone mass and change in chemical composition of the matrix 

d. It is common in old age. 


Answer- There is reduction of bone mass and change in chemical composition of the matrix


Que- Which of the following statements about fractures in old age is incorrect? 

a. They are more common than in adult age. 

b. Occur as a result of bone being thin and weak. 

c. Due to good blood supply it results in quick healing. 

d. It involves osteoblasts and osteocytes. 


Answer- Due to good blood supply it results in quick healing.


Que- If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called 

a. Open reduction. 

b. Closed Fixation. 

c. Open fixation. 

d. Immobilization 


Answer- Open reduction.


Que- A fracture hematoma has 

a. Healing properties. 

b. Destructive properties. 

c. Neutralizing properties. 

d. Dead cells 


Answer- Dead cells


Que- Which of the following cells are involved in soft callus formation? 

a. Fibroblast and osteoblast. 

b. Osteoblast and osteoclast. 

c. Osteoclast and osteocyte 

d. Onteocyte and osteoblast 


Answer- Fibroblast and osteoblast.


Que- Bony callus formation completes in: 

a. 2-3 weeks 

b. 3-4 weeks. 

c. 2-3 months. 

d. 3-4 months. 


Answer- 2-3 months.


Que- Which of the following is a uni-nucleated cell? 

a. A smooth muscle cell. 

b. A cardiac muscle cell. 

c. A skeletal muscle cell. 

d. All of these 


Answer- A smooth muscle cell.


Que- The contraction of which of the following muscle fibers, is controlled by hormones: 

a. A smooth muscle 

b. A cardiac muscle 

c. A skeletal muscle. 

d. All of these 


Answer- A smooth muscle


Que- Why skeletal muscles are called striated muscles? 

a. They appear darker than smooth muscles by naked eye. 

b. Alternating dark and light bands appear on their surface when visualized by naked eye. 

c. Alternating dark and light bands appear on their surface when visualized via a microscope. 

d. All of these 


Answer- Alternating dark and light bands appear on their surface when visualized via a microscope.


Que- Which of the following statements is incorrect about skeletal muscle fibers? 

a. They are multinucleated. 

b. They are 10 - 100 ?m in diameter & surrounded by sarcolemma 

c. They contain O2 storing molecules called hemoglobin. 

d. Their cytoplasm contains high concentration of carbohydrates 


Answer- They contain O2 storing molecules called hemoglobin.


Que- A smallest contractile unit of muscle contraction called sarcomere is the area between two: 

a. H- zone 

b. M- Line 

c. Z- Line 

d. A band 


Answer- Z- Line


Que- Diameter of thick filament is: 

a. 7 nm. 

b. 8 nm 

c. 16nm 

d. 10-100 ?m. 


Answer- 16nm


Que- The most important function of troponin is 

a. To bind with actin 

b. To bind with tropomyosin. 

c. To bind with Ca2+ ions. 

d. All of these 


Answer- All of these


Que- If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules: 

a. 9.0 

b. 5.0 

c. 6.0 

d. 7.0 


Answer- 6.0


Que- What happens during muscle contraction to the length of each myosin and action filament? 

a. Z- lines get closer 

b. A band becomes short 

c. 1 band elongates 

d. There is no change in sarcomere 


Answer- Z- lines get closer


Que- Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction. 

a. Binding sites of actin get attached to the myosin head. 

b. Troponin uncovers the actin binding sites. 

c. Tropomyosin gets removed from the binding sites of actin filaments. 

d. Ca2+ goes back inside sarcoplasmic reticulum. 


Answer- Tropomyosin gets removed from the binding sites of actin filaments.


Que- Rigor mortis i.e, stiffening of body after death results from: 

a. Accunulation of rigid proteins molecules in sarcoplam. 

b. Unavailability of ATP, which is necessary to break the link between actin and myosin. 

c. Decrease in body temperature after death. 

d. Death of tissue due to unavailability of O 


Answer- Unavailability of ATP, which is necessary to break the link between actin and myosin.


Que- Which of the following statement about fatigue is correct? 

a. The major event in it is accumulation of lactic acid. 

b. Lactic acid accumulation turns pH in acidic range leading to muscle ache. 

c. Ionic imbalance may also cause it. 

d. All of these 


Answer- All of these


Que- Tetany is caused by 

a. Hypocalcemia 

b. Hypercalcemia 

c. Clostridum tetani. 

d. Low O2 level 


Answer- Hypocalcemia


Que- Which one of the following is an example of a non-elastic connective tissue? 

a. Ligaments. 

b. Tendon 

c. Muscles. 

d. None of these 


Answer- Tendon


Que- Which of the following muscle is an antagonistic member of Biceps brachii? 

a. Bracheoradialis 

b. Brachialis. 

c. Intercostals 

d. Triceps 


Answer- Triceps


Que- Insertion of Biceps is on 

a. Ulna 

b. Radius 

c. Olecronon process of ulna. 

d. Scapula 


Answer- Radius


Que- Which of the following animal uses Setae and Muscles for their Iocomotion? 

a. Cockroach 

b. Snail 

c. Earthworm 

d. Star fish 


Answer- Earthworm


Que- Which of the following vertebrates have a fish-like body? 

a. Reptiles 

b. Aves 

c. Amphibians 

d. Mammals. 


Answer- Amphibians


Que- Which of the following pairs of fins in a fish body are paired? 

a. Dorsal and ventral. 

b. Pectoral and Pelvic. 

c. Tail and anal 

d. All of these 


Answer- Pectoral and Pelvic.


Que- Among the following organisms which shows the best adaptations for locomotion? 

a. Amoeba. 

b. Earthworm. 

c. Reptiles 

d. Amphibians. 


Answer- Reptiles


Que- Which of the following is the swiftest form of the locomotion? 

a. Plantigrade 

b. Digitigrade 

c. Unguligrade 

d. Hopping 


Answer- Unguligrade


Que- S-band locomotion is characteristically seen in: 

a. Bony fish 

b. Cartilaginous fish. 

c. Fish like mammals. 

d. All fishes. 


Answer- Cartilaginous fish.


Que- Chlorosis, i.e., yellowish hue on the leaves results from 

a. Accumulation of toxic waste products in leaves. 

b. Deficiency of chlorophyll. 

c. Short supplies of mineral nutrients in the soil. 

d. All of these 


Answer- All of these


Que- Chemically auxins are 

a. Indole propionic acid. 

b. Indole carboxylic acid. 

c. Indole acetaldehyde 

d. Indole acetic acid. 


Answer- Indole acetic acid.


Que- Gibberellins may be substituted for _____ light, therefore promote flowering in long day plants. 

a. White 

b. Red 

c. Blue 

d. Green 


Answer- Red


Que- Which of the following is antagonist to Auxin in terms of promotion of stem growth? 

a. Gibberellins 

b. Cytokinins 

c. Abscisic Acid 

d. none of these. 


Answer- Abscisic Acid


Que- Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering: 

a. Gibberellins 

b. Cytokinins 

c. Auxins 

d. Ethene. 


Answer- Gibberellins


Que- The only promoter of leaf senescence in the following plant hormones is: 

a. Gibberellins 

b. Cytokinins 

c. Auxins 

d. Abscisic Acid 


Answer- Abscisic Acid


Que- Which of the following is used in brewing industry to promote malting: 

a. Gibberellins 

b. Cytokinins 

c. Auxins 

d. Abscisic Acid 


Answer- Gibberellins


Que- Which type of the receptors are present in the ear? 

a. Chemoreceptors 

b. Mechanoreceptors 

c. Photoreceptors 

d. Thermoreceptors 


Answer- Mechanoreceptors


Que- Type of sensations carried by nociceptors are: 

a. Touch. 

b. Temperature. 

c. Pressure. 

d. Pain 


Answer- Pain


Que- Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips? 

a. Hair end organs 

b. Meissner's Corpuscles. 

c. Pacinian corpuscles. 

d. None of these. 


Answer- Meissner's Corpuscles.


Que- Which type of sensory structures carry deep pressure and vibration sensations? 

a. Hair end organs 

b. Meissner's Corpuscles. 

c. Pacinian corpuscles. 

d. none of these. 


Answer- Pacinian corpuscles.


Que- Nissl's granules are present in which part of the neuron? 

a. Axoplasm 

b. Myelin sheath. 

c. Dendrite. 

d. Soma. 


Answer- Soma.


Que- Which of the following statement about neuron is incorrect? 

a. They not only conduct impulses but also generate them. 

b. They are not the only cellular component of nervous system. 

c. They may show limited regenerative capabilities. 

d. Like all the living cell, when they mature and divide to form similar cells. 


Answer- Like all the living cell, when they mature and divide to form similar cells.


Que- Type of neurons found exclusively in CNS are: 

a. Sensory neurons 

b. Motor neurons 

c. Associative neurons 

d. None of these. 


Answer- Associative neurons


Que- Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an _______ process. 

a. Active 

b. Passive 

c. Diffusional 

d. None of these. 


Answer- Active


Que- Cell membrane under resting conditions is impermeable to all the ions except 

a. Na+ 

b. K+ 

c. Cl- 

d. PO4-2 


Answer- K+


Que- At the induction of action potential opening of Na+ gate with influx of Na+ is a _________ processes: 

a. Active transport. 

b. Passive transport. 

c. Diffusion. 

d. none of these. 


Answer- Passive transport.


Que- Normal action potential of a neuronal cell is : 

a. plus 50 mv 

b. plus 60 mv 

c. plus 70 mv 

d. plus 80 mv 


Answer- plus 50 mv


Que- Na+ -K+ ATPase pump is important for: 

a. Maintenance of resting potential. 

b. Massive out flux of K+ after depolarization. 

c. Recovery of resting potential. 

d. Conversion of resting potential into action potential. 


Answer- Recovery of resting potential.


Que- Maximum speed of nerve impulse transmission is 

a. 100 m/sec 

b. 110 m/sec 

c. 120m/sec 

d. 130 m/sec. 


Answer- 120m/sec


Que- Which of the following has no central nervous system? 

a. Hydra 

b. Man 

c. Planaria 

d. Cockroach 


Answer- Hydra


Que- Co-ordination results in 

a. Regulation of body functions 

b. Organization of body functions 

c. Integration of body functions 

d. All of these 


Answer- All of these


Que- Which of the following are responsible for the detection of changes in environment? 

a. Receptors 

b. Neurons 

c. Effectors 

d. All of these 


Answer- Receptors


Que- Which of the followings are effectors? 

a. Muscles 

b. Glands 

c. Sensory organs 

d. Both 'a' & 'b' 


Answer- Both 'a' & 'b'


Que- Any change in the environment of an organism is called 

a. Stimulus 

b. Variation 

c. Response 

d. Reaction 


Answer- Stimulus


Que- Hydra has 

a. Brain 

b. Nerves 

c. Neuron-cells 

d. All of these 


Answer- Neuron-cells


Que- Which of the followings is missing from the nervous system of planaria? 

a. Ganglia 

b. Longitudinal nerves 

c. Lateral nerves 

d. none of these. 


Answer- none of these.


Que- Co-ordination in man is brought about by 

a. Nervous system 

b. Endocrine system 

c. Both of these 

d. none of these. 


Answer- Both of these


Que- Which of the following transmits nerve impulse from receptors to central nervous system? 

a. Sensory neuron 

b. Motor neuron 

c. Associative neuron 

d. none of these. 


Answer- Sensory neuron


Que- In which of the following neurons length of dendrite is greater than axon? 

a. Sensory neuron 

b. Motor neuron 

c. Associative neuron 

d. none of these. 


Answer- Sensory neuron


Que- Which of the following neuron has a single long dendron? 

a. Sensory neuron 

b. Motor neuron 

c. Associative neuron 

d. none of these. 


Answer- Sensory neuron


Que- Which of the following cytoplasmic extensions carry the message toward the cell body? 

a. Dendrites 

b. Axon 

c. Both of these 

d. none of these. 


Answer- Dendrites


Que- Microscopic gaps between the neuron endings are called 

a. Transmitters 

b. Synapses 

c. Pores 

d. Nodes 


Answer- Synapses


Que- What is the function of synapse? 

a. To allow nerve impulse to move in backward direction 

b. To decrease the speed of nerve impulse 

c. To stop the nerve impulse 

d. To provide cytoplasmic connection between neurons. 


Answer- To decrease the speed of nerve impulse


Que- Under resting membrane potentials 

a. Outer surface of neuron is more positive 

b. Inner surface of neuron is more positive 

c. Both of these surfaces are equally positive 

d. none of these. 


Answer- Outer surface of neuron is more positive


Que- Which of the following ions are involved in the initiation of nerve impulse 

a. Na+ 

b. K+ 

c. Fe 

d. none of these. 


Answer- Na+


Que- Reflex actions below the neck are under control of 

a. Brain 

b. Spinal cord 

c. Hypothalamus 

d. none of these. 


Answer- Spinal cord


Que- Central nervous system of man consists of 

a. Brain 

b. Spinal cord 

c. Both of these 

d. none of these. 


Answer- Both of these


Que- Which of the following is largest part of brain 

a. Cerebrum 

b. Cerebellum 

c. Medulla oblongata 

d. Thalamus 


Answer- Cerebrum


Que- Which of the following is present inside the vertebral column 

a. Brain 

b. Spinal cord 

c. Both of these 

d. none of these. 


Answer- Spinal cord


Que- Intelligence is under the control of 

a. Cerebrum 

b. Cerebellum 

c. Thalamus 

d. Hypothalamus 


Answer- Cerebrum


Que- Which of the following is second largest part of the brain? 

a. Cerebrum 

b. Cerebellum 

c. Thalamus 

d. Hypothalamus 


Answer- Cerebellum


Que- Which of the following acts as thermoregulator? 

a. Cerebrum 

b. Cerebellum 

c. Thalamus 

d. Hypothalamus 


Answer- Hypothalamus


Que- Which of the following allows precise muscular movements? 

a. Cerebrum 

b. Cerebellum 

c. Thalamus 

d. Hypothalamus 


Answer- Cerebellum


Que- Receptors for hearing come under heading of 

a. Chemical 

b. Mechanical 

c. Photo 

d. Nociceptors 


Answer- Mechanical


Que- It is one of the convulsive disorders of nerves which are characterized by abrupt transient symptoms of motor, sensory, psychic or autonomic nature. 

a. Parkinson's disease 

b. Epilepsy 

c. Alzheimer's discease 

d. Dementia 


Answer- Epilepsy


Que- Which of the following feature is not related to neuron 

a. Conduction 

b. Regeneration 

c. Reflex 

d. Movement 


Answer- Regeneration


Que- Value of resting membrane potential is 

a. 0.03 V 

b. 0.05 V 

c. 0.07 V 

d. 0.09V 


Answer- 0.07 V


Que- Number of pairs of cranial nerves is 

a. 10.0 

b. 11.0 

c. 12.0 

d. 13.0 


Answer- 12.0


Que- Insufficient secretion of iodothyroxine in adults causes 

a. Myxedema 

b. Cretinism 

c. Goiter 

d. Exopthalmic goiter 


Answer- Myxedema


Que- Insulin and glucagons are ________ in nature. 

a. Protein 

b. Amino acid derivative 

c. Polypeptide 

d. Steroid 


Answer- Protein


Que- Acromegaly is caused due to oversecretion of 

a. STH 

b. TSH 

c. ACTH 

d. Thyroxin 


Answer- Thyroxin


Que- MSH is produced from 

a. Anterior pituitary 

b. Median pituitary 

c. Posterior pituitary 

d. None of these 


Answer- Median pituitary


Que- Grave's disease is produced due to 

a. Undersecretion of thyroxin 

b. Overproduction of thyroxin 

c. Undersecretion of corticosteroids 

d. Overproduction of corticosteroids 


Answer- Overproduction of thyroxin


Que- Secretin is a hormone produced by 

a. Stomach 

b. Liver 

c. Pancreas 

d. Duodenum 


Answer- Duodenum


Que- All of the following are similarities between nervous and endocrine system except 

a. Produce chemical messengers 

b. Release chemical messengers in extracellular space 

c. Homestatic in function 

d. Having slow but prolonged effects 


Answer- Having slow but prolonged effects


Que- Types of behaviour enabling pillbugs to reach moist area is 

a. Kinesis 

b. Taxes 

c. Instinct 

d. Learning 


Answer- Kinesis


Que- _________ was first to propose an objective definition of instinct. 

a. Thorpe 

b. Darwin 

c. Pavlov 

d. Kohler 


Answer- Darwin


Que- _______ is simplest form of learning. 

a. Imprinting 

b. Habituation 

c. Insight learning 

d. Latent learning 


Answer- Habituation


Que- In asexual reproduction offspring are produced by 

a. Meiosis 

b. Mitosis 

c. Both a and b 

d. None of these 


Answer- Mitosis


Que- Which method is of asexual reproduction? 

a. Sporulation 

b. Fission 

c. Apomixis 

d. All of these 


Answer- All of these


Que- Gametes in animals are produced by 

a. Mitosis 

b. Meiosis 

c. Fission 

d. Apomixis 


Answer- Mitosis


Que- In sexual reproduction, plants have diplohaplontic life cycle with alternating 

a. Diploid sporophyte and haploid gametophyte generations 

b. Haploid sporophyte and diploid gametophyte generations 

c. Diploid sporophyte and diploid gametophyte generations 

d. Haploid sporophyte and haploid gametophyte generations 


Answer- Diploid sporophyte and haploid gametophyte generations


Que- Which statement is correct? 

a. In heteromorphic generations are vegetatively dissimilar 

b. In isomorphic generations are vegetatively dissimilar 

c. In isomorphic generations are vegetatively similar 

d. Both a and c 


Answer- Both a and c


Que- In parthenocarpy which levels are high in ovaries 

a. Gibberalins 

b. Cytokinins 

c. Auxins 

d. All of these 


Answer- Auxins


Que- Seeds are dormant in conditions of 

a. Water scarcity 

b. Low temperature 

c. Harsh winters 

d. All of these 


Answer- All of these


Que- Developing seeds are rich source of 

a. Auxins 

b. Gibberellins 

c. Cytokinins 

d. All of these 


Answer- All of these

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