(a) It is a rod pigment that enables vision in low light.
(b) It is a cone pigment that enables vision in bright light.
(c) It is a G-protein coupled receptor.
(d) It is a cone pigment and G-protein coupled receptor.
Select the correct option:
Rhodopsin Properties Analysis
This section analyzes the given statements about rhodopsin to determine its true characteristics.
Statement (a): True
Rhodopsin is the primary visual pigment found in rod cells. Rod cells are responsible for scotopic vision, which is vision in low light conditions.
Statement (b): False
Cone pigments (like photopsins) are responsible for photopic vision (bright light). Rhodopsin's role is specifically in low light vision via rod cells, not bright light vision via cones.
Statement (c): True
Rhodopsin is a classic example of a G-protein coupled receptor (GPCR). It belongs to the opsin family, which are known GPCRs involved in visual phototransduction.
Statement (d): False
This statement is false because rhodopsin is a rod pigment, not a cone pigment, as established in the analysis of statement (a).
Conclusion on Rhodopsin
Based on the analysis, statements (a) and (c) are true regarding rhodopsin.
- Statement (a) correctly identifies rhodopsin as a rod pigment for low light vision.
- Statement (c) correctly identifies rhodopsin as a G-protein coupled receptor.
Selecting the Correct Option
The option that includes only the true statements (a) and (c) is the correct choice.
Therefore, Option 4, stating (a) and (c) only, is the correct selection.
Important Questions from Sense organs - Teaching
- An observer watches the video in which the speaker's lips form the sound 'ga-ga' while the sound trace provides speech that is normally perceived as 'ba-ba'. The conjunction of these conflicting sources produces the perception of 'da-da' which integrates these information and results in which illusion?
- Hold a pencil at arm's length and look at it first with one eye then with the other. There is a little difference between the two views relative to the background. Now bring the pencil just six inches away from your face and try the same thing. This time you will perceive a great difference between the two views. Which one is the correct answer of above example?
Fill in the blanks by choosing the right sequence :
In the upside-down and reversed-image projection process on ________ the ________ bends
the rays entering the eye and the light rays from the top of an object are projected onto
________ at the bottom of ________.
Select the correct option:- Match List-I with List-II:
List-I
(Type of Skin Receptors)List-II
(Sensory Function)(a) Meissner's corpuscles (i) Cold (b) Pacinian corpuscles (ii) Pain (c) Krauser's end bulbs (iii) Touch (d) Free nerve ending (iv) Pressure
Select the correct option: - The human retina contains approximately ______
