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.
| 351. |
Thickening of uterine wall is done by |
| A. | progesterone |
| B. | oxytocin |
| C. | oestrogen |
| D. | thyroxine |
| Answer» D. thyroxine | |
| 352. |
Left atrium moves to left ventricle, carrying |
| A. | oxygenated blood |
| B. | deoxygenated blood |
| C. | oxyhemoglobin |
| D. | carboxyhemoglobin |
| Answer» B. deoxygenated blood | |
| 353. |
Effectors which respond by secreting various hormones are |
| A. | glands |
| B. | muscles |
| C. | cartilage |
| D. | bones |
| Answer» B. muscles | |
| 354. |
Which one is true for hormones |
| A. | stays in blood stream permanently |
| B. | are deposited in liver |
| C. | are destroyed in liver after specific function is performed |
| D. | act in the absence of enzymes |
| Answer» D. act in the absence of enzymes | |
| 355. |
Superior vena cava is also known as |
| A. | pulmonary arch |
| B. | common anterior |
| C. | tricuspid artery |
| D. | bicuspid valve |
| Answer» C. tricuspid artery | |
| 356. |
In the cardiac system, systole means |
| A. | a "lub" sound |
| B. | ventricular relaxation |
| C. | closure of semilunar valves |
| D. | a "dub" sound |
| Answer» B. ventricular relaxation | |
| 357. |
Left atrium receives blood from the |
| A. | pulmonary veins |
| B. | two vena cava |
| C. | right ventricle |
| D. | left ventricle |
| Answer» B. two vena cava | |
| 358. |
Shape of pituitary gland is |
| A. | circle |
| B. | square |
| C. | triangular |
| D. | ovoid |
| Answer» E. | |
| 359. |
Throughout axoplasm, there are present |
| A. | microtubules |
| B. | neurofibrils |
| C. | rough endoplasmic reticulum and mitochondria |
| D. | all of the above |
| Answer» E. | |
| 360. |
In spinal cord, the grey matter |
| A. | surrounded by white matter |
| B. | surrounds the white matter |
| C. | does not exist |
| D. | forms nerves |
| Answer» B. surrounds the white matter | |
| 361. |
For each impulse autonomic nervous system utilizes only |
| A. | four neurons and two ganglion |
| B. | two neurons and one ganglion |
| C. | one neuron and one ganglion |
| D. | one neuron and two ganglions |
| Answer» C. one neuron and one ganglion | |
| 362. |
Bilobed-mass composed of two ganglia in planaria is a substitute of |
| A. | spinal cord |
| B. | brain |
| C. | network of neurons |
| D. | none of the others |
| Answer» C. network of neurons | |
| 363. |
Many nerve fibers bundle together to form |
| A. | Dendron |
| B. | Myelin sheath |
| C. | Neurilemma |
| D. | Node of Ranvier |
| Answer» B. Myelin sheath | |
| 364. |
Abnormal development of hands, feet and jaws is known as |
| A. | microcephaly |
| B. | gigantism |
| C. | acromegaly |
| D. | epilepsy |
| Answer» D. epilepsy | |
| 365. |
Sensory nerve contains |
| A. | motor fibres |
| B. | mixed fibres |
| C. | relay fibres |
| D. | sensory fibres |
| Answer» E. | |
| 366. |
In coordination system ,Neurilemma |
| A. | insulates myelin sheath |
| B. | sinks down at the node of Ranvier |
| C. | is a bundle of nerve fiber |
| D. | all of above |
| Answer» C. is a bundle of nerve fiber | |
| 367. |
Hormone causing larva to grow or turn into a pupa is |
| A. | elastin |
| B. | JH |
| C. | ADH |
| D. | estrogen |
| Answer» C. ADH | |
| 368. |
At intervals, along the length, the spinal cord |
| A. | has myelin sheath |
| B. | has grey matter |
| C. | gives off spinal nerves |
| D. | branches off into dendrites |
| Answer» D. branches off into dendrites | |
| 369. |
Blinking of an eye is an example of |
| A. | cranial reflexes |
| B. | motor neurons |
| C. | relay neurons |
| D. | spinal reflexes |
| Answer» B. motor neurons | |
| 370. |
Lungs receive oxygenated blood from |
| A. | hepatic artery |
| B. | iliac artery |
| C. | carotid artery |
| D. | none of others |
| Answer» E. | |
| 371. |
Behavior activities occurring at regular intervals are called |
| A. | synchronized rhythms |
| B. | repeated actions |
| C. | biorhythms |
| D. | periodic rhythms |
| Answer» D. periodic rhythms | |
| 372. |
Body positions is maintained by |
| A. | cerebrum |
| B. | pons |
| C. | cerebellum |
| D. | medulla |
| Answer» D. medulla | |
| 373. |
Function of neurilemma is to |
| A. | insulate the myelin sheath |
| B. | provide nourishment to myelin sheath |
| C. | protects myelin sheath from ruptures |
| D. | protect the stimuli in neuron from being lost |
| Answer» C. protects myelin sheath from ruptures | |
| 374. |
Sprouting of potatoes is inhibited by |
| A. | ethane |
| B. | 2,4 D |
| C. | NAA |
| D. | Cytokinins |
| Answer» C. NAA | |
| 375. |
Liver receives oxygenated blood from |
| A. | hepatic artery |
| B. | iliac artery |
| C. | renal artery |
| D. | carotid artery |
| Answer» B. iliac artery | |
| 376. |
Blood flows through a closed system in |
| A. | echinoderms |
| B. | nematodes |
| C. | most birds |
| D. | vertebrates |
| Answer» E. | |
| 377. |
Impulses are carried from receptors to CNS and then to |
| A. | spinal cord |
| B. | organs |
| C. | effectors |
| D. | conductors |
| Answer» D. conductors | |
| 378. |
Involuntary actions are controlled by |
| A. | Midbrain |
| B. | Cerebellum |
| C. | Medulla Oblongata |
| D. | Hypothalamus |
| Answer» D. Hypothalamus | |
| 379. |
Corticosterone belongs to group |
| A. | glucocorticoid |
| B. | mineralocorticoid |
| C. | Both a and b |
| D. | steroids |
| Answer» D. steroids | |
| 380. |
Tactical movement is felt, when the impulse reaches the |
| A. | midbrain |
| B. | hindbrain |
| C. | Medulla Oblongata |
| D. | cerebrum |
| Answer» E. | |
| 381. |
A neuron at rest is electrically |
| A. | more postive outside |
| B. | more negative outside |
| C. | neutral |
| D. | may be positive or negative outside |
| Answer» B. more negative outside | |
| 382. |
Heart beat rate, blood pressure and digestive tract mobility is increased by |
| A. | thyroxine |
| B. | nicotine |
| C. | steroids |
| D. | epinephrine |
| Answer» C. steroids | |
| 383. |
Neurons once mature |
| A. | divide untill death |
| B. | don't divide any further |
| C. | divide only once |
| D. | divide even after death |
| Answer» C. divide only once | |
| 384. |
Lobe of pituitary often referred to as master gland, is the |
| A. | frontal |
| B. | posterior |
| C. | anterior |
| D. | median |
| Answer» D. median | |
| 385. |
Sympathetic nervous system is associated with |
| A. | hormonal secretions |
| B. | fear and rage |
| C. | skeletal muscles |
| D. | fight and flight |
| Answer» E. | |
| 386. |
Inside of neuron, membrane is made more negative by |
| A. | carbohydrates |
| B. | fats |
| C. | proteins and organic acids |
| D. | lipids |
| Answer» D. lipids | |
| 387. |
A nerve impulse is passed from one neuron to other through |
| A. | node of ranvier |
| B. | synapse |
| C. | cellbody |
| D. | dendrites |
| Answer» C. cellbody | |
| 388. |
Nicotine may induce |
| A. | vomiting |
| B. | constipation |
| C. | infections |
| D. | bloating |
| Answer» B. constipation | |
| 389. |
Naphthalene acetic acid (NAA) and 2,4 dichloro phenoxy acetic acid are |
| A. | natural auxins |
| B. | gibberellins |
| C. | cytokinins |
| D. | synthetic auxins |
| Answer» E. | |
| 390. |
Autonomic nervous system is further divided into |
| A. | three parts |
| B. | two parts |
| C. | four parts |
| D. | five parts |
| Answer» C. four parts | |
| 391. |
Prolactin stimulates production of |
| A. | red blood cells |
| B. | keratin |
| C. | milk |
| D. | lactose |
| Answer» D. lactose | |
| 392. |
Gibberellins are produced commercially from |
| A. | fungal culture |
| B. | bacterial culture |
| C. | plants |
| D. | viruses |
| Answer» B. bacterial culture | |
| 393. |
Cause of graves' disease is production of an abnormal |
| A. | body fats |
| B. | body lipids |
| C. | body protein |
| D. | body salts |
| Answer» D. body salts | |
| 394. |
Dilation of blood vessels in skeletal muscles is caused by |
| A. | oxytocin |
| B. | adrenaline |
| C. | oestrogen |
| D. | noradrenaline |
| Answer» C. oestrogen | |
| 395. |
Increase in higher mental activities of learning and memory is a result of |
| A. | increase in size of hypothalamus |
| B. | increase in size of thalamus |
| C. | increase in size of pons |
| D. | increase in size of cerebral hemispheres |
| Answer» E. | |
| 396. |
To study epilepsy, a test is conducted called |
| A. | spectrography |
| B. | chromatography |
| C. | lithotripsy |
| D. | electroencephalography |
| Answer» E. | |
| 397. |
NAA (naphthalene acetic acid ) helps in |
| A. | fruit setting |
| B. | abscission |
| C. | sprouting of potatoes |
| D. | leaf senescence |
| Answer» B. abscission | |
| 398. |
Ganglia are structures formed by cluster of |
| A. | cell bodies |
| B. | axons |
| C. | dendrites |
| D. | whole neurons |
| Answer» B. axons | |
| 399. |
Midbrain contains reticular formation which is a relay center for connecting |
| A. | mid brain and forebrain |
| B. | midbrain and hind brain |
| C. | hind brain and forebrain |
| D. | only mid brain |
| Answer» D. only mid brain | |
| 400. |
When an artery dilates the |
| A. | lumen becomes constricted |
| B. | lumen gets wider |
| C. | person may appear pale |
| D. | elastic muscles become ineffective |
| Answer» C. person may appear pale | |