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.
| 301. |
In raising blood pressure, two hormones whose effect is synergistic are |
| A. | cortisol and corticosterone |
| B. | cortico-steroids and corticosterone |
| C. | aldosterone and androgenic hormones |
| D. | adrenaline and non-adrenaline |
| Answer» E. | |
| 302. |
This is a characteristic of hydra |
| A. | absence of sensory, motor and relay neurons |
| B. | absence of sense organs |
| C. | absence of brain |
| D. | all of the above |
| Answer» E. | |
| 303. |
To ensure normal growth and development of body, thyroid gland produces |
| A. | thiamine |
| B. | thrombokinase |
| C. | thyroxin |
| D. | insulin |
| Answer» D. insulin | |
| 304. |
Myelin sheath around a neuron is for |
| A. | elasticity |
| B. | protection |
| C. | nutrition |
| D. | detecting stimuli |
| Answer» C. nutrition | |
| 305. |
Semilunar valves are present at the bases of |
| A. | pulmonary artery only |
| B. | aorta only |
| C. | pulmonary veins |
| D. | pulmonary artery and aorta |
| Answer» E. | |
| 306. |
Pituitary gland is also known as |
| A. | hyperphysis cerebri |
| B. | hypomixis cerebri |
| C. | hypophysis cerebri |
| D. | hypermixis cerebri |
| Answer» D. hypermixis cerebri | |
| 307. |
Appearance of dendrites is like that of a |
| A. | tree |
| B. | circle |
| C. | leaf |
| D. | net |
| Answer» B. circle | |
| 308. |
Hormonal control involves |
| A. | electrical signals |
| B. | chemical substances |
| C. | mechanical signals |
| D. | photochemical energy |
| Answer» C. mechanical signals | |
| 309. |
Preventing loss of sodium ions from kidney tubes is a function of |
| A. | cortisol |
| B. | aldosterone |
| C. | corticosterone |
| D. | gastrin |
| Answer» C. corticosterone | |
| 310. |
Cerebellum is best developed in |
| A. | planaria |
| B. | rodents |
| C. | human |
| D. | birds |
| Answer» E. | |
| 311. |
Active membrane potential of a neuron is |
| A. | ?0.05 volts |
| B. | ?0.07 volts |
| C. | ?0.08 volts |
| D. | ?0.09 volts |
| Answer» B. ?0.07 volts | |
| 312. |
During travel of nerve impulse, across cell membrane |
| A. | lysosomes move |
| B. | molecules move |
| C. | ions move |
| D. | atoms move |
| Answer» D. atoms move | |
| 313. |
All are true about Dorsal aorta ,but |
| A. | run parallel to backbone |
| B. | curl upwards to the left side of the heart |
| C. | give off hepatic artery |
| D. | give off iliac artery |
| Answer» C. give off hepatic artery | |
| 314. |
Intelligence of an animal can be judged through size of |
| A. | brain |
| B. | medulla oblongata |
| C. | Cerebral hemisphere |
| D. | cerebellum |
| Answer» D. cerebellum | |
| 315. |
All is true for double circulations, but that it |
| A. | occur in all vertebrates |
| B. | occur only in mammals |
| C. | is composed of pulmonary circulation |
| D. | is composed of systematic circulation |
| Answer» B. occur only in mammals | |
| 316. |
Processes conducting impulse away from cell body are termed as |
| A. | dendrites |
| B. | axons |
| C. | dendrons |
| D. | roots |
| Answer» C. dendrons | |
| 317. |
Some sensory neurons have |
| A. | no nucleus |
| B. | short dendrites |
| C. | long dendrites |
| D. | no dendrites |
| Answer» D. no dendrites | |
| 318. |
Building up and breaking down reactions can be called as |
| A. | substrate and hydrate reactions |
| B. | synthesis and hydratic reactions |
| C. | synthesis and hydrolysis reactions |
| D. | synchronizing and hyperactive reactions |
| Answer» D. synchronizing and hyperactive reactions | |
| 319. |
Auxins promote growth at a very low concentration in |
| A. | shoots |
| B. | roots |
| C. | flowers |
| D. | nodes |
| Answer» C. flowers | |
| 320. |
In mammal, thyroid gland has lobes |
| A. | one in number |
| B. | two in number |
| C. | three in number |
| D. | four in number |
| Answer» C. three in number | |
| 321. |
Female digger wasp because of instincts |
| A. | catches caterpillars |
| B. | prepares a nest |
| C. | kills caterpillars by sting |
| D. | all of the above |
| Answer» E. | |
| 322. |
In humans, Progesterone controls |
| A. | development of mammary glands |
| B. | broadening of pelvis |
| C. | enlargement of breasts for lactation |
| D. | all of above |
| Answer» D. all of above | |
| 323. |
Most of the actions performed under a will are |
| A. | involuntary actions |
| B. | voluntary actions |
| C. | reflex actions |
| D. | sudden actions |
| Answer» C. reflex actions | |
| 324. |
Biosynthesis of materials necessary for growth of neurons is a concern of |
| A. | axon |
| B. | cell body or soma |
| C. | dendron |
| D. | node |
| Answer» C. dendron | |
| 325. |
In adults, hypothyroidism results in |
| A. | less appetite |
| B. | excess sleep |
| C. | feelings of sluggishness |
| D. | hyperactivity |
| Answer» D. hyperactivity | |
| 326. |
The right ventricle has thinner walls than the |
| A. | right atrium |
| B. | left ventricle |
| C. | left atrium |
| D. | pulmonary arch |
| Answer» C. left atrium | |
| 327. |
At a point during oestrous cycle, oestrogen exert a positive feedback which results in increased production of |
| A. | prolactin |
| B. | progesterone |
| C. | LH |
| D. | FSH |
| Answer» D. FSH | |
| 328. |
Forelimbs receive oxygenated blood through |
| A. | dorsal aorta |
| B. | carotid artery |
| C. | subclavian artery |
| D. | iliac artery |
| Answer» D. iliac artery | |
| 329. |
Flowering in pineapple is induced by |
| A. | cytokinins |
| B. | ethane |
| C. | gibberellin |
| D. | auxins |
| Answer» C. gibberellin | |
| 330. |
Stomach and intestines get rid of deoxygenated blood through |
| A. | hepatic portal vein |
| B. | renal vein |
| C. | posterior vena cava |
| D. | iliac vein |
| Answer» B. renal vein | |
| 331. |
In case of no actual danger, alarm calls of rodents are ignored. This behaviour comes under |
| A. | learning |
| B. | instinctive behaviour |
| C. | habituation |
| D. | taxes |
| Answer» D. taxes | |
| 332. |
Auxins |
| A. | promote apical dominance |
| B. | promote fruit growth |
| C. | induce parthenocarpy |
| D. | all of the above |
| Answer» E. | |
| 333. |
Spinal nerves emerge from the |
| A. | vertebral column |
| B. | spinal cord |
| C. | Medulla Oblongata |
| D. | cerebrum |
| Answer» C. Medulla Oblongata | |
| 334. |
In humans, reduced part of brain is |
| A. | fore brain |
| B. | mid brain |
| C. | hind brain |
| D. | cerebral cortex |
| Answer» C. hind brain | |
| 335. |
Behaviour which enables pillbugs to reach moist area which is required for their life is termed as |
| A. | reflex |
| B. | instinct |
| C. | imprinting |
| D. | kineses |
| Answer» E. | |
| 336. |
Muscular co-ordination is controlled through |
| A. | medulla oblongata |
| B. | midbrain |
| C. | hypothalamus |
| D. | cerebellum |
| Answer» E. | |
| 337. |
Most thick walls are of |
| A. | left atrium |
| B. | left ventricle |
| C. | right atrium |
| D. | right ventricle |
| Answer» C. right atrium | |
| 338. |
Reflex action is a/an |
| A. | involuntary action |
| B. | semi-voluntary action |
| C. | voluntary action |
| D. | manual action |
| Answer» B. semi-voluntary action | |
| 339. |
Each type of Principal sensation pain, touch, sight, sound are called |
| A. | Modalities of sensation |
| B. | modalities of reception |
| C. | modalities of concentration |
| D. | modalities of detection |
| Answer» B. modalities of reception | |
| 340. |
Somatic nervous system is made up of |
| A. | motor neurons |
| B. | sensory neurons |
| C. | associative neurons |
| D. | relay neurons |
| Answer» B. sensory neurons | |
| 341. |
Built in mechanism by which sign stimuli are recognized is called |
| A. | inner recognizing mechanism (IRM) |
| B. | innate recognizing mechanism (IRM) |
| C. | inner releasing mechanism (IRM) |
| D. | innate releasing mechanism (IRM) |
| Answer» E. | |
| 342. |
Functions of adrenaline includes |
| A. | high metabolic rate |
| B. | pupil dilation |
| C. | fast heart rate |
| D. | all of above |
| Answer» E. | |
| 343. |
Reflex actions includes |
| A. | breathing |
| B. | coughing |
| C. | heartbeat |
| D. | vasodilation |
| Answer» C. heartbeat | |
| 344. |
Blood in pulmonary arteries is at a lower pressure than blood in |
| A. | pulmonary arch |
| B. | aorta |
| C. | lungs |
| D. | inferior vena cava |
| Answer» C. lungs | |
| 345. |
Cell membrane is virtually impermeable to all ions except |
| A. | Mg+ |
| B. | K+ |
| C. | H+ |
| D. | Ca? |
| Answer» C. H+ | |
| 346. |
White matter is made up of |
| A. | non-myelinated nerve fibres |
| B. | cell bodies only |
| C. | myelinated nerve fibres |
| D. | dendrites only |
| Answer» D. dendrites only | |
| 347. |
In order to provide nutrients to the spinal cord, |
| A. | grey matter surrounds the cord |
| B. | white mater surrounds the cord |
| C. | cerebrospinal fluid runs through the cord |
| D. | H-shaped grey matter is helpful |
| Answer» D. H-shaped grey matter is helpful | |
| 348. |
Iliac veins carry deoxygenated blood from |
| A. | liver |
| B. | stomach |
| C. | kidneys |
| D. | hind limbs |
| Answer» E. | |
| 349. |
All is true for resting organisms, but, |
| A. | no energy is lost in sleep |
| B. | sleeping requires food |
| C. | organisms continue growth in sleep |
| D. | organisms' medulla keeps working even in sleep |
| Answer» B. sleeping requires food | |
| 350. |
Human central nervous system is made up of |
| A. | 10 to 100 billion neurons |
| B. | 100 to 1000 billion neurons |
| C. | 10 to 100 million neurons |
| D. | 100 to 1000 million neurons |
| Answer» B. 100 to 1000 billion neurons | |