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Evaluation · Q13

Q.Several statements are given here in reference to cone cells which of the following option indicates all correct statements for cone cells?
Statements

(i) Cone cells are less sensitive in bright light than Rod cells
(ii) They are responsible for colour vision
(iii) Erythropsin is a photo pigment which is sensitive to red colour light
(iv) They are present in fovea of retina
a. (iii),
(ii) and
(i)
b. (ii),
(iii) and
(iv)
c. (i),
(iii) and
(iv)
d. (i),
(ii) and (iv)
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Step 1. Statement (i) is false: cones work best in bright light and are more, not less, sensitive in bright light compared to rods, which are instead specialised for dim light.

Step 2. Statement (ii) is true: cones are responsible for colour vision.

Step 3. Statement (iii) is true: erythropsin is the red-cone pigment, sensitive to the long wavelength (~560 nm) associated with red light. …

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