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.
| 401. |
Hormone produce their effect by |
| A. | initiating new biochemical reactions |
| B. | regulating already present chemical reactions |
| C. | synthesizing new compounds |
| D. | none of the above |
| Answer» C. synthesizing new compounds | |
| 402. |
Production of insulin causes |
| A. | proper appetite |
| B. | an overall increase in glucose utilization |
| C. | feelings of sluggishness |
| D. | coma and death |
| Answer» C. feelings of sluggishness | |
| 403. |
Amygdala is involved in the |
| A. | formation of long-term memory |
| B. | learning |
| C. | feelings of fear and rage |
| D. | thinking |
| Answer» D. thinking | |
| 404. |
Breathing and swallowing are controlled by |
| A. | medulla |
| B. | pons |
| C. | cerebellum |
| D. | thalamus |
| Answer» B. pons | |
| 405. |
Swelling of neck due to deficiency of thyroxine is termed as |
| A. | cretinism |
| B. | graves' disease |
| C. | goiter |
| D. | rickets |
| Answer» D. rickets | |
| 406. |
Hormonal control is |
| A. | voluntary or involuntary |
| B. | always involuntary |
| C. | always voluntary |
| D. | always reflex |
| Answer» C. always voluntary | |
| 407. |
If somatotrophin hormone is produced in excess during early life, it leads to |
| A. | abnormal development of hands,jaws,feet |
| B. | cleft palate |
| C. | epilepsy |
| D. | gigantism |
| Answer» E. | |
| 408. |
K+ ions during active potential causes repolarization by |
| A. | rushing inside |
| B. | diffusing outside |
| C. | not moving |
| D. | diffusing inside |
| Answer» C. not moving | |
| 409. |
Between two neurons, a microscopic gap exists which is contact point of neurons called |
| A. | node of ranvier |
| B. | neuron bridges |
| C. | synapse |
| D. | gaps |
| Answer» D. gaps | |
| 410. |
Backflow of blood into the ventricle is prevented through |
| A. | bicuspid valves |
| B. | tricuspid valves |
| C. | mitral valve and the chordae tendineae |
| D. | semilunar valves |
| Answer» E. | |
| 411. |
From Platyhelminthes to chordates including humans, nervous system present is |
| A. | diffused type |
| B. | centralized type |
| C. | primary type |
| D. | reflex type |
| Answer» C. primary type | |
| 412. |
Receptors which detect stimuli of touch pressure are |
| A. | Chemoreceptors |
| B. | Nociceptors |
| C. | Mechanoreceptors |
| D. | Thermoreceptors |
| Answer» D. Thermoreceptors | |
| 413. |
Primary sexual characteristic in males include |
| A. | deepening of voice |
| B. | growth of facial and pubic hair |
| C. | maturation of sex organs |
| D. | immaturation of sex organ |
| Answer» D. immaturation of sex organ | |
| 414. |
All are wrong about pituitary gland, but |
| A. | regulates body temperature |
| B. | regulates sleep |
| C. | is attached to the hypothalamus |
| D. | regulates emotions |
| Answer» D. regulates emotions | |
| 415. |
After leaving the spinal cord, the spinal nerve gets divided into nerve fibers, connecting to |
| A. | receptors |
| B. | effectors |
| C. | midbrain |
| D. | all parts of body |
| Answer» E. | |
| 416. |
In cell body of neuron, there are some specialized granules named |
| A. | Ervin's granules |
| B. | Nissl's granules |
| C. | Alois's granules |
| D. | Darwin's granules |
| Answer» C. Alois's granules | |
| 417. |
Outer layers of the spinal cord are formed through |
| A. | grey matter |
| B. | white matter |
| C. | black matter |
| D. | brown matter |
| Answer» C. black matter | |
| 418. |
Meaning of word Cephalo is |
| A. | neck |
| B. | shoulders |
| C. | head |
| D. | brain |
| Answer» D. brain | |
| 419. |
Distention of cervix stimulates release of |
| A. | testosterone |
| B. | oestrogen |
| C. | oxytocin |
| D. | thyroxine |
| Answer» D. thyroxine | |
| 420. |
Cranial nerves also known as cerebral nerves arise from the |
| A. | brain |
| B. | spinal cord |
| C. | vertebral column |
| D. | peripheral nerves |
| Answer» B. spinal cord | |
| 421. |
Axon may be more than |
| A. | five meter long |
| B. | one meter long |
| C. | two meter long |
| D. | three meter long |
| Answer» C. two meter long | |
| 422. |
In rats, ability to withstand any stress situation such as cold is diminished, if |
| A. | adrenal cortex is removed |
| B. | adrenal medulla is removed |
| C. | cortex is removed |
| D. | medulla is removed |
| Answer» C. cortex is removed | |
| 423. |
Measure of capacity to do electrical work is called |
| A. | impulse potential |
| B. | electrical potential |
| C. | charge potential |
| D. | ion potential |
| Answer» C. charge potential | |
| 424. |
Hypothalamus is a part of |
| A. | midbrain |
| B. | forebrain |
| C. | hindbrain |
| D. | future brain |
| Answer» C. hindbrain | |
| 425. |
Bilobed-mass composed of two ganglia are present in body of |
| A. | hydra |
| B. | planaria |
| C. | humans |
| D. | rats |
| Answer» C. humans | |
| 426. |
Diffused type nervous system is present in |
| A. | hydra |
| B. | rats |
| C. | earthworm |
| D. | amoeba |
| Answer» B. rats | |
| 427. |
Secretin effects production of |
| A. | bile |
| B. | pancreatic juice |
| C. | gastric juice |
| D. | Both a and b |
| Answer» E. | |
| 428. |
Upon a tactical stimuli, the impulses are transmitted from the receptor neurons to the |
| A. | midbrain |
| B. | grey matter of spinal cord |
| C. | white matter of spinal cord |
| D. | hind brain |
| Answer» C. white matter of spinal cord | |
| 429. |
If a person frequently shrieks and cries and falls down unconscious and rigid. This might be a sign of |
| A. | alzheimer's disease |
| B. | parkinson's disease |
| C. | epilepsy |
| D. | arthritis |
| Answer» D. arthritis | |
| 430. |
Nutritional part of a neuron is |
| A. | axon |
| B. | node |
| C. | soma or cell body |
| D. | dendrites |
| Answer» D. dendrites | |
| 431. |
Mass of pituitary gland in man is about |
| A. | 10 gm |
| B. | 1 gm |
| C. | 0.5 gm |
| D. | 3 gm |
| Answer» D. 3 gm | |
| 432. |
Word lutenisation means |
| A. | turning green |
| B. | turning yellow |
| C. | turning white |
| D. | turning blue |
| Answer» C. turning white | |
| 433. |
Cold receptors are more abundant than heat receptors |
| A. | 15 times |
| B. | 10 Times |
| C. | 5 times |
| D. | 20 times |
| Answer» C. 5 times | |
| 434. |
Adaptive changes in individual behaviour as a result of experience are termed as |
| A. | learning |
| B. | behaviour |
| C. | taxes |
| D. | instincts |
| Answer» B. behaviour | |
| 435. |
Number of pairs of spinal nerves humans have is |
| A. | 30 |
| B. | 29 |
| C. | 32 |
| D. | 31 |
| Answer» E. | |
| 436. |
Pulmonary arteries lead to |
| A. | right atrium |
| B. | lungs |
| C. | left atrium |
| D. | pulmonary arch |
| Answer» C. left atrium | |
| 437. |
Reticular formation is important in screening |
| A. | input information |
| B. | output information |
| C. | both input and output information |
| D. | neutral information |
| Answer» B. output information | |
| 438. |
In juvenile diabetes, it is |
| A. | seldom necessary to inject insulin |
| B. | compulsory to inject insulin daily |
| C. | not good to keep sweets along |
| D. | not necessary to watch for carbohydrates |
| Answer» C. not good to keep sweets along | |
| 439. |
In amphibians, thyroxine bring about process of |
| A. | ecdysis |
| B. | metamorphosis |
| C. | egg laying |
| D. | growth |
| Answer» C. egg laying | |
| 440. |
When a nerve impulse is generated in a neuron, its resting membrane potential is replaced by |
| A. | passive membrane potential |
| B. | powerful membrane potential |
| C. | active membrane potential |
| D. | intelligent membrane potential |
| Answer» D. intelligent membrane potential | |
| 441. |
Average normal heart beat of an adult is |
| A. | depends on exact age |
| B. | depends on gender of adult |
| C. | depends on the weight of adult |
| D. | is approx. 72 times per minute |
| Answer» E. | |
| 442. |
Directed movements either towards or away from a stimulus is called |
| A. | taxes |
| B. | kineses |
| C. | reflex |
| D. | instinct |
| Answer» B. kineses | |
| 443. |
Excessive rapid electric discharge in gray matter occurs in |
| A. | parkinson's disease |
| B. | epilepsy |
| C. | alzheimer's disease |
| D. | tetanus |
| Answer» C. alzheimer's disease | |
| 444. |
Endocrine glands are |
| A. | faster than nervous system |
| B. | glands with ducts |
| C. | ductless glands |
| D. | outside the body |
| Answer» D. outside the body | |
| 445. |
No. of pairs of cranial nerves in humans is |
| A. | 10 |
| B. | 13 |
| C. | 12 |
| D. | 15 |
| Answer» D. 15 | |
| 446. |
Bud initiation in shoots in promoted by |
| A. | auxin |
| B. | gibberellins |
| C. | cytokinins |
| D. | ethane |
| Answer» B. gibberellins | |
| 447. |
Many of sensory stimuli of nervous system are converted into hormonal responses in |
| A. | thalamus |
| B. | hypothalamus |
| C. | cerebrum |
| D. | pons |
| Answer» C. cerebrum | |
| 448. |
Release of corticotrophin releasing factor is controlled by nervous stimulation of hypothalamus as a result of |
| A. | stress |
| B. | heat and cold |
| C. | pain |
| D. | all of the above |
| Answer» E. | |
| 449. |
Melanophore stimulating hormone (MSH) is secreted by |
| A. | anterior lobe of pituitary |
| B. | posterior lobe of pituitary |
| C. | median lobe of pituitary |
| D. | frontal lobe of pituitary |
| Answer» D. frontal lobe of pituitary | |
| 450. |
Receptors for smell, taste and for blood Oxygen etc. are |
| A. | Mechanoreceptors |
| B. | Chemoreceptors |
| C. | Thermoreceptors |
| D. | Nociceptors |
| Answer» C. Thermoreceptors | |