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CBNS practice questions Questions and Correct Answers/ Latest Update / Already Graded

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CBNS practice questions Questions and Correct Answers/ Latest Update / Already Graded

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CBNS practice questions Questions and
Correct Answers/ Latest Update / Already
Graded
Which layer of retinal neurons has axons that leave the retina?



a. Outer Nuclear layer



b. Inner Nuclear layer



c. Ganglion cell layer



d. Inner plexiform layer

Ans: C. Ganglion cell layer


The ganglion cell layer contains the cell bodies of the ganglion
cells. These are the only cells with axons that leave the retina


What is the spectral sensitivity of the free cone pigments?



a. 460 nm


All rights reserved © 2025/ 2026 |

, Page |2



b. 560 nm



c. 430 nm



d. 530 nm

Ans: d. 530 nm


The cones in our retinas contain one of three opsins. These
opsins give the photopigments different spectral sensitivities.
Green cones are maximally activated by the light with a
wavelength of about 530 nm.


What is reflection?

Ans: c. Light rays bouncing off a surface


Why is the retina said to be duplex?

Ans: Because it can work under both scotopic and photopic
lighting conditions




All rights reserved © 2025/ 2026 |

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