kvcpk wrote:Light is registered in the retina when photos hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photos of light, rhodopsin molecules sometimes change shape because of normal molecular motion, thereby introducing error into the visual system. The amount of this molecular motion is directly proportional to the temperature of the retina.

Which of the following conclusions is most strongly supported by the information above?

A. The temperature of an animal's retina depends on the amount of light the retina is absorbing.
B. The visual systems of animal whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones.
C. As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons.
D. Rhodopsin molecules are more sensitive to photons in animals whose retinas have large surface areas than in animals whose retinas have small surface areas.
E. Molecules of rhodopsin are the only pigment molecules that occur naturally in the retina.

[spoiler]unfortunately the option I eliminated first as OOS, was the OA. Wanted to share this challenging one with all.


imo C

all other seem out of scope
Source: Powerscore CR Bible[/spoiler]

globalcitizen wrote:I feel like its either B or D....but I am leaning toward D.

B sounds correct but I don't know if we can assume that body temperature = retina temperature.

D, however, addresses the light and temperature. Rhodopsin molecules are sensitive to light (photons) and heat (large surface area means that the retina heats up faster).

I could be totally wrong (CR is my weakest area in verbal), so I won't go into further detail without knowing the OA.

786 wrote:nice question .

However , it should provide more info stating the temp of retina is directly proportional to the body temperature .

kvcpk wrote:Light is registered in the retina when photos hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photos of light, rhodopsin molecules sometimes change shape because of normal molecular motion, thereby introducing error into the visual system. The amount of this molecular motion is directly proportional to the temperature of the retina.

Which of the following conclusions is most strongly supported by the information above?

A. The temperature of an animal's retina depends on the amount of light the retina is absorbing.
B. The visual systems of animal whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones.
C. As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons.
D. Rhodopsin molecules are more sensitive to photons in animals whose retinas have large surface areas than in animals whose retinas have small surface areas.
E. Molecules of rhodopsin are the only pigment molecules that occur naturally in the retina.

Read B carefully... If the visual system of an animal (the retina is part of this system) is at a temperature equal to that of the surroundings, the last sentence of the text suggests that B is true

[spoiler]unfortunately the option I eliminated first as OOS, was the OA. Wanted to share this challenging one with all.
Source: Powerscore CR Bible[/spoiler]

Sanjay2706 wrote:IMO D.
What's the OA?