MCQOPTIONS
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MCQOPTIONS
This section includes 517 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Neurotransmitter molecules are released into |
| A. | microscopic gap |
| B. | cell body of next neuron |
| C. | axon of next neuron |
| D. | synaptic cleft |
| Answer» E. | |
| 52. |
Cortisone hormone belongs to family of |
| A. | amino acid and derivatives |
| B. | proteins |
| C. | polypeptides |
| D. | steroids |
| Answer» E. | |
| 53. |
Part of hydra's body that is most responsive to a stimulus is |
| A. | body wall |
| B. | bud |
| C. | tentacles |
| D. | mouth |
| Answer» D. mouth | |
| 54. |
From the medulla oblongata to the end of the vertebral column is |
| A. | cerebrum |
| B. | hypothalamus |
| C. | spinal cord |
| D. | mid brain |
| Answer» D. mid brain | |
| 55. |
Semilunar valves are found in |
| A. | aorta |
| B. | arteries |
| C. | veins |
| D. | pulmonary artery |
| Answer» D. pulmonary artery | |
| 56. |
Cortisol antagonizes action of |
| A. | amylase |
| B. | gastrin |
| C. | insulin |
| D. | secretin |
| Answer» D. secretin | |
| 57. |
Oxygenated blood is brought to the heart through |
| A. | lungs |
| B. | pulmonary artery |
| C. | pulmonary vein |
| D. | pulmonary arch |
| Answer» D. pulmonary arch | |
| 58. |
Melanocytes in skin produce pigments that are |
| A. | black in colour |
| B. | yellow in colour |
| C. | brown in colour |
| D. | white in colour |
| Answer» D. white in colour | |
| 59. |
Nervous control acts through |
| A. | impulses transmitted by neuron |
| B. | hormones transported by blood |
| C. | leukocytes in blood |
| D. | thrombocytes |
| Answer» B. hormones transported by blood | |
| 60. |
Suddenly pulling brakes in traffic emergency is an example of |
| A. | cardio-vascular coordination |
| B. | reflex action |
| C. | voluntary actions |
| D. | involuntary actions |
| Answer» C. voluntary actions | |
| 61. |
Microscopic blood vessel found between the cells of all tissues are |
| A. | venues |
| B. | arterioles |
| C. | capillaries |
| D. | vein |
| Answer» D. vein | |
| 62. |
Presence of veins was demonstrated by |
| A. | Jan-Baptista van Helmont |
| B. | William Harvey |
| C. | Robert Hooke |
| D. | John Dalton |
| Answer» C. Robert Hooke | |
| 63. |
The "dub" sound is produced when |
| A. | atria are fully contracted |
| B. | atria start to relax |
| C. | after the semilunar valves are closed |
| D. | after the bicuspid and tricuspid valves suddenly close |
| Answer» D. after the bicuspid and tricuspid valves suddenly close | |
| 64. |
Diarrhea is caused due to |
| A. | increase in blood flow |
| B. | increase in rate of peristalsis |
| C. | decrease in rate of peristalsis |
| D. | decrease in blood flow |
| Answer» C. decrease in rate of peristalsis | |
| 65. |
Prolonged excessive secretion of thyroxine can lead to |
| A. | kidney failure |
| B. | cardiac failure |
| C. | lung failure |
| D. | ulcer |
| Answer» C. lung failure | |
| 66. |
If adrenaline increases the blood flow in muscles, the long term effect will be |
| A. | the feeling of being more alive |
| B. | vasoconstriction of muscles occurs |
| C. | an improved muscular performance |
| D. | muscles becoming tense and painful |
| Answer» E. | |
| 67. |
Diastole in cardiac system means |
| A. | "lub" sound |
| B. | ventricular contraction |
| C. | ventricular relaxation |
| D. | "dub" sound |
| Answer» D. "dub" sound | |
| 68. |
Disease myxoedema is characterized by |
| A. | swelling of the neck |
| B. | puffiness of hands skin |
| C. | puffiness of eyes |
| D. | pain in joints |
| Answer» C. puffiness of eyes | |
| 69. |
Structural and functional unit of nervous system is |
| A. | receptors |
| B. | effectors |
| C. | brain |
| D. | neuron |
| Answer» E. | |
| 70. |
Motor nerves transmit impulses from |
| A. | brain to effectors |
| B. | brain to receptors |
| C. | brain to spinal cord |
| D. | brain to nerve fibers |
| Answer» C. brain to spinal cord | |
| 71. |
A snail crawling on a sheet of glass ultimately stops responding to tapping which is known as |
| A. | conditioning |
| B. | habituation |
| C. | instinct |
| D. | learning behaviour |
| Answer» C. instinct | |
| 72. |
Hormones which control secretion of hormones in many other endocrine glands are |
| A. | adrenals |
| B. | parathyroids |
| C. | gonads |
| D. | tropic hormones |
| Answer» E. | |
| 73. |
Reflex movement of eyes is controlled by |
| A. | forebrain |
| B. | midbrain |
| C. | hindbrain |
| D. | future brain |
| Answer» C. hindbrain | |
| 74. |
Inferior vena cava is formed through a combination of |
| A. | two arteries |
| B. | three arteries |
| C. | four arteries |
| D. | three veins |
| Answer» E. | |
| 75. |
First scientist to propose an objective definition of instincts in terms of animal behaviour is |
| A. | isaac newton |
| B. | darwin |
| C. | uexkull |
| D. | lorenz |
| Answer» C. uexkull | |
| 76. |
Stimuli are also known as |
| A. | receptors |
| B. | nerve impulse |
| C. | biosensors |
| D. | detectors |
| Answer» B. nerve impulse | |
| 77. |
In resting membrane, potential sodium ions are higher in amount outside than inside membrane surface is |
| A. | ten times |
| B. | twenty times |
| C. | fifteen times |
| D. | twenty two times |
| Answer» B. twenty times | |
| 78. |
Possible sign stimulus for digger wasp for which it responds is |
| A. | a leaf |
| B. | larva |
| C. | caterpillar |
| D. | nest |
| Answer» D. nest | |
| 79. |
All are the functions of the hypothalamus, but not regulation of |
| A. | body temperature |
| B. | anti-diuretic hormones |
| C. | sleep and emotions |
| D. | blood osmotic pressure |
| Answer» C. sleep and emotions | |
| 80. |
In mammals, Endothelium is |
| A. | elastic in nature |
| B. | fully permeable |
| C. | selectively permeable |
| D. | non-permeable |
| Answer» D. non-permeable | |
| 81. |
Nerve impulses of carbon dioxide (CO₂) concentration are transmitted to CNS through |
| A. | Dendron |
| B. | axons |
| C. | forebrain |
| D. | PNS |
| Answer» E. | |
| 82. |
Function of spinal nerves is to transmit |
| A. | impulses from receptors to motor neurons |
| B. | impulses from receptors to forebrain |
| C. | impulses from receptors to spinal cord |
| D. | transmit any stimulus |
| Answer» D. transmit any stimulus | |
| 83. |
Insulin is produced in |
| A. | Thyroid gland |
| B. | Adrenal gland |
| C. | Pancreatic glands |
| D. | Pituitary gland |
| Answer» D. Pituitary gland | |
| 84. |
One unit of blood is equivalent to |
| A. | 410 ml |
| B. | 420 ml |
| C. | 430 ml |
| D. | 440 ml |
| Answer» D. 440 ml | |
| 85. |
Gastrin hormone stimulates secretion of |
| A. | pancreatic juice |
| B. | gastric juice |
| C. | hydrochloric acid |
| D. | mucus |
| Answer» C. hydrochloric acid | |
| 86. |
In the spinal cord, the impulse is transmitted from receptor neuron to relay neuron via |
| A. | effector neuron |
| B. | pituitary gland |
| C. | synapse |
| D. | sebum |
| Answer» D. sebum | |
| 87. |
In transportation in mammals, both atria works |
| A. | simultaneously |
| B. | alternately |
| C. | unproportionally |
| D. | proportionally |
| Answer» B. alternately | |
| 88. |
Modification of behaviour through a diminution of response to repeated stimuli is |
| A. | habituation |
| B. | conditioning |
| C. | imprinting |
| D. | taxes |
| Answer» B. conditioning | |
| 89. |
Na+ and K+ pumps in cell membrane work due to |
| A. | splitting of H?O |
| B. | splitting of ATP |
| C. | splitting of glucose |
| D. | hydration of proteins |
| Answer» C. splitting of glucose | |
| 90. |
Terminal branches of axon are known as |
| A. | synapse |
| B. | myelin sheath |
| C. | dendrites |
| D. | Dendron |
| Answer» D. Dendron | |
| 91. |
Pupil dilation, digestion and acceleration of heart beat is done by |
| A. | somatic nervous system |
| B. | autonomic nervous system |
| C. | sympathetic nervous system |
| D. | para-sympathetic nervous system |
| Answer» D. para-sympathetic nervous system | |
| 92. |
Symptoms of alzheimer's disease are similar to those diseases that cause |
| A. | epilepsy |
| B. | dementia |
| C. | depression |
| D. | split personality disorder |
| Answer» C. depression | |
| 93. |
Hormone belonging to only mineralocorticoid is |
| A. | cortisol |
| B. | corticosterone |
| C. | aldosterone |
| D. | androgens |
| Answer» D. androgens | |
| 94. |
Sight or smell of food causing dilation is an example of |
| A. | relay neurons |
| B. | reflex actions |
| C. | involuntary actions |
| D. | voluntary actions |
| Answer» C. involuntary actions | |
| 95. |
Cell body of neuron is also known as |
| A. | main body |
| B. | soma |
| C. | somal body |
| D. | stoma |
| Answer» C. somal body | |
| 96. |
Tremor of hands and head occurs in |
| A. | alzheimer's disease |
| B. | parkinson's disease |
| C. | arthritis |
| D. | microcephaly |
| Answer» C. arthritis | |
| 97. |
Oxytocin is secreted by pituitary gland's |
| A. | anterior lobe |
| B. | median lobe |
| C. | posterior lobe |
| D. | frontal lobe |
| Answer» D. frontal lobe | |
| 98. |
Indole acetic acid (IAA) stands for |
| A. | Iodine acetic acid |
| B. | initiator acetic acid |
| C. | indole acetic acid |
| D. | iron acetic acid |
| Answer» D. iron acetic acid | |
| 99. |
Neurons at rest (non-conducting neuron) has electric potential called |
| A. | sleep membrane potential |
| B. | resting membrane potential |
| C. | passive membrane potential |
| D. | dormant membrane potential |
| Answer» C. passive membrane potential | |
| 100. |
Acetylcholine and adrenaline are |
| A. | enzymes |
| B. | neuro-transmitters |
| C. | nitrogenous bases |
| D. | ions |
| Answer» C. nitrogenous bases | |