MCQOPTIONS
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MCQOPTIONS
This section includes 49 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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» E. | |
| 2. |
Chemically auxins are |
| A. | Indole propionic acid. |
| B. | Indole carboxylic acid. |
| C. | Indole acetaldehyde |
| D. | Indole acetic acid. |
| Answer» E. | |
| 3. |
Gibberellins may be substituted for _____ light, therefore promote flowering in long day plants. |
| A. | White |
| B. | Red |
| C. | Blue |
| D. | Green |
| Answer» C. Blue | |
| 4. |
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» D. None of these. | |
| 5. |
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» B. Cytokinins | |
| 6. |
The only promoter of leaf senescence in the following plant hormones is: |
| A. | Gibberellins |
| B. | Cytokinins |
| C. | Auxins |
| D. | Abscisic Acid |
| Answer» E. | |
| 7. |
Which of the following is used in brewing industry to promote malting: |
| A. | Gibberellins |
| B. | Cytokinins |
| C. | Auxins |
| D. | Abscisic Acid |
| Answer» B. Cytokinins | |
| 8. |
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» C. To stop the nerve impulse | |
| 9. |
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» B. Inner surface of neuron is more positive | |
| 10. |
Which of the following ions are involved in the initiation of nerve impulse |
| A. | Na+ |
| B. | K+ |
| C. | Fe |
| D. | None of these. |
| Answer» B. K+ | |
| 11. |
Reflex actions below the neck are under control of |
| A. | Brain |
| B. | Spinal cord |
| C. | Hypothalamus |
| D. | None of these. |
| Answer» C. Hypothalamus | |
| 12. |
Central nervous system of man consists of |
| A. | Brain |
| B. | Spinal cord |
| C. | Both of these |
| D. | None of these. |
| Answer» D. None of these. | |
| 13. |
Which of the following is largest part of brain |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Medulla oblongata |
| D. | Thalamus |
| Answer» B. Cerebellum | |
| 14. |
Which of the following is present inside the vertebral column |
| A. | Brain |
| B. | Spinal cord |
| C. | Both of these |
| D. | None of these. |
| Answer» C. Both of these | |
| 15. |
Which of the following is second largest part of the brain? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» C. Thalamus | |
| 16. |
Intelligence is under the control of |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» B. Cerebellum | |
| 17. |
Which of the following allows precise muscular movements? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» C. Thalamus | |
| 18. |
Receptors for hearing come under heading of |
| A. | Chemical |
| B. | Mechanical |
| C. | Photo |
| D. | Nociceptors |
| Answer» C. Photo | |
| 19. |
Which of the following feature is not related to neuron |
| A. | Conduction |
| B. | Regeneration |
| C. | Reflex |
| D. | Movement |
| Answer» C. Reflex | |
| 20. |
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» B. Plus 60 mv | |
| 21. |
Value of resting membrane potential is |
| A. | 0.03 V |
| B. | 0.05 V |
| C. | 0.07 V |
| D. | 0.09V |
| Answer» D. 0.09V | |
| 22. |
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» D. Conversion of resting potential into action potential. | |
| 23. |
Maximum speed of nerve impulse transmission is |
| A. | 100 m/sec |
| B. | 110 m/sec |
| C. | 120m/sec |
| D. | 130 m/sec. |
| Answer» D. 130 m/sec. | |
| 24. |
Co-ordination results in |
| A. | Regulation of body functions |
| B. | Organization of body functions |
| C. | Integration of body functions |
| D. | All of these |
| Answer» E. | |
| 25. |
Any change in the environment of an organism is called |
| A. | Stimulus |
| B. | Variation |
| C. | Response |
| D. | Reaction |
| Answer» B. Variation | |
| 26. |
Hydra has |
| A. | Brain |
| B. | Nerves |
| C. | Neuron-cells |
| D. | All of these |
| Answer» D. All of these | |
| 27. |
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» E. | |
| 28. |
Co-ordination in man is brought about by |
| A. | Nervous system |
| B. | Endocrine system |
| C. | Both of these |
| D. | None of these. |
| Answer» D. None of these. | |
| 29. |
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» B. Motor neuron | |
| 30. |
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» B. Axon | |
| 31. |
Microscopic gaps between the neuron endings are called |
| A. | Transmitters |
| B. | Synapses |
| C. | Pores |
| D. | Nodes |
| Answer» C. Pores | |
| 32. |
Number of pairs of cranial nerves is |
| A. | 10 |
| B. | 11 |
| C. | 12 |
| D. | 13 |
| Answer» D. 13 | |
| 33. |
Which type of the receptors are present in the ear? |
| A. | Chemoreceptors |
| B. | Mechanoreceptors |
| C. | Photoreceptors |
| D. | Thermoreceptors |
| Answer» C. Photoreceptors | |
| 34. |
Type of sensations carried by nociceptors are: |
| A. | Touch. |
| B. | Temperature. |
| C. | Pressure. |
| D. | Pain |
| Answer» E. | |
| 35. |
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» E. | |
| 36. |
Type of neurons found exclusively in CNS are: |
| A. | Sensory neurons |
| B. | Motor neurons |
| C. | Associative neurons |
| D. | None of these. |
| Answer» D. None of these. | |
| 37. |
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» B. Passive | |
| 38. |
Cell membrane under resting conditions is impermeable to all the ions except |
| A. | Na+ |
| B. | K+ |
| C. | Cl- |
| D. | PO4-2 |
| Answer» C. Cl- | |
| 39. |
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» C. Diffusion. | |
| 40. |
Normal resting membrane potential of a neuron is |
| A. | ? 50 mv |
| B. | ? 60 mv |
| C. | ? 70 mv |
| D. | ? 80 mv |
| Answer» D. ? 80 mv | |
| 41. |
MSH is produced from |
| A. | Anterior pituitary |
| B. | Median pituitary |
| C. | Posterior pituitary |
| D. | None of these |
| Answer» C. Posterior pituitary | |
| 42. |
Acromegaly is caused due to oversecretion of |
| A. | STH |
| B. | TSH |
| C. | ACTH |
| D. | Thyroxin |
| Answer» E. | |
| 43. |
Insufficient secretion of iodothyroxine in adults causes |
| A. | Myxedema |
| B. | Cretinism |
| C. | Goiter |
| D. | Exopthalmic goiter |
| Answer» B. Cretinism | |
| 44. |
Insulin and glucagons are ________ in nature. |
| A. | Protein |
| B. | Amino acid derivative |
| C. | Polypeptide |
| D. | Steroid |
| Answer» B. Amino acid derivative | |
| 45. |
Secretin is a hormone produced by |
| A. | Stomach |
| B. | Liver |
| C. | Pancreas |
| D. | Duodenum |
| Answer» E. | |
| 46. |
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» E. | |
| 47. |
Types of behaviour enabling pillbugs to reach moist area is |
| A. | Kinesis |
| B. | Taxes |
| C. | Instinct |
| D. | Learning |
| Answer» B. Taxes | |
| 48. |
_________ was first to propose an objective definition of instinct. |
| A. | Thorpe |
| B. | Darwin |
| C. | Pavlov |
| D. | Kohler |
| Answer» C. Pavlov | |
| 49. |
_______ is simplest form of learning. |
| A. | Imprinting |
| B. | Habituation |
| C. | Insight learning |
| D. | Latent learning |
| Answer» C. Insight learning | |