MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When visual stimulus reaches receptors in retina of eye, second process involving absorption of physical energy by receptors is? |
| A. | Reception |
| B. | Transduction |
| C. | Coding |
| D. | Adaptation |
| Answer» C. Coding | |
| 2. |
When visual stimulus reaches receptors in retina of eye, first process involving absorption of physical energy by receptors is? |
| A. | Reception |
| B. | Transduction |
| C. | Coding |
| D. | Adaptation |
| Answer» B. Transduction | |
| 3. |
What is the relationship between olfactory sensors and gustatory sensors? |
| A. | Gustatory hair can also detect odorants |
| B. | Olfactory hair can also detect tastants |
| C. | Olfactory sensors provides information about substance that we are about to taste |
| D. | No relation |
| Answer» D. No relation | |
| 4. |
Which of the following statements is not true about olfactory neurons? |
| A. | Axons of olfactory neurons combine to form olfactory nerves |
| B. | They synapse with cells in olfactory bulb |
| C. | They have receptors that react with odorants dissolved in fluid |
| D. | They are uni-polar neurons |
| Answer» E. | |
| 5. |
Objects are perceived by photo receptors because rods or cones |
| A. | Depolarize |
| B. | Hyperpolarize |
| C. | Repolarize |
| D. | Polarize |
| Answer» C. Repolarize | |
| 6. |
Most olfactory receptors are located on the _________ |
| A. | Superior surface of nasal cavity |
| B. | Interior surface of nasal cavity |
| C. | Lateral surface of nasal cavity |
| D. | Medial surface of nasal cavity |
| Answer» B. Interior surface of nasal cavity | |
| 7. |
Which out of the following statements about sense of smell is not true? |
| A. | Olfactory receptor cells are bipolar neurons, not replaced when damaged |
| B. | The chemicals are received by specific plasma membrane receptors in olfactory receptor cells |
| C. | Olfactory receptors do not adapt quickly |
| D. | The main areas of brain that interpret sense of smell be in the temporal and frontal lobes |
| Answer» D. The main areas of brain that interpret sense of smell be in the temporal and frontal lobes | |
| 8. |
Vision, olfaction and gustation employ _________ |
| A. | Serpentine receptors |
| B. | Enzyme coupled receptors |
| C. | Ligand gated receptors |
| D. | Adhesion receptors |
| Answer» B. Enzyme coupled receptors | |
| 9. |
In cholera there is uncontrolled secretion of _________ |
| A. | Na<sup>+</sup> and H<sub>2</sub>O |
| B. | K<sup>+</sup> and H<sub>2</sub>O |
| C. | Ca<sup>+2</sup> and H<sub>2</sub>O |
| D. | Mg<sup>+2</sup> and H<sub>2</sub>O |
| Answer» B. K<sup>+</sup> and H<sub>2</sub>O | |
| 10. |
Cholera toxin is not a/an _________ |
| A. | Enzyme inhibitor |
| B. | Enzyme activator |
| C. | Enzyme modifier |
| D. | Toxin released from bacteria in the infected intestine |
| Answer» C. Enzyme modifier | |
| 11. |
The G protein involved in visual signal transduction is _________ |
| A. | Rhodopsin |
| B. | GTP receptor |
| C. | Arrestin |
| D. | Transducin |
| Answer» D. Transducin | |