GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 24 Sep 2018, 06:40

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Light is registered in the retina when photons hit molecules

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Joined: 18 Dec 2006
Posts: 49
Light is registered in the retina when photons hit molecules  [#permalink]

Show Tags

New post 01 Sep 2010, 14:04
3
7
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

68% (01:34) correct 32% (01:58) wrong based on 721 sessions

HideShow timer Statistics

Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules’ shape. Even when they have not been struck by photons 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 one 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 animals 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.

Source :Lsat
Intern
Intern
avatar
Joined: 08 Nov 2009
Posts: 15
Re: Someone explain this CR question  [#permalink]

Show Tags

New post 01 Sep 2010, 16:38
1
The gist of the argument is
Increase in temperature -->Increase in molecular activity -->Increase in error .
A : The argument does not talk about absorption : So incorrect
B: Only option that makes sense : Hence correct .
C: No mention of rhodopsin reacting slowly or quickly to photon hits : Incorrect
D: No mention of surface areas : Incorrect
E: No mention of rhodopsin being the only pigment molecule (rhodopsin is a pigment does not mean that its molecules are the only pigmented molecules): Incorrect
Senior Manager
Senior Manager
avatar
Joined: 06 Jun 2009
Posts: 299
Location: USA
WE 1: Engineering
Re: Someone explain this CR question  [#permalink]

Show Tags

New post 13 Sep 2010, 08:38
Dreamy wrote:
How introducing animals will be out of scope as the stimulus doesn't talk about it is only in humans or any other subset.



These kind of questions are best solved from POE (Power of Elimination). If you go through all the choices, four of them have nothing to do with the information provided in the statement.

Incorrect . Author does not say that light absorption raises the temp of the eye. (A) The temperature of an animal’s retina depends on the amount of light the retina is absorbing.

(B) The visual systems of animals whose body temperature matches that of their
surroundings are more error-prone in hot surroundings than in cold ones.

Incorrect. Not given in the premises. (C) As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons.

Incorrect. Nothing related to the surface area has been mentioned in the premises. (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.

Incorrect. Nothing mentioned about this (E) Molecules of rhodopsin are the only pigment
molecules that occur naturally in the retina.

We can always argue that how the hell are these animals been introduced. It is stretching it too far etc. Please note -

1. By POE, we are left with only one choice.

2. Secondly, the question is asking us to draw a conclusion based on the info in the statement. Based on the statement, it is correct to say that animals whose body temp match the surroundings will have more error in vision, in hot surroundings than in cold. True. Molecular motion is DIRECTLY PROPORTIONAL to the temp. Therefore, hotter temp will introduce more motion, therefore, more error.
_________________

All things are possible to those who believe.

Manager
Manager
avatar
Joined: 22 Aug 2008
Posts: 156
Re: Someone explain this CR question  [#permalink]

Show Tags

New post 13 Sep 2010, 23:40
golfpro20050 wrote:

Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules’ shape. Even when they have not been struck by photons 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 one 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.not related to the molecular motion
(B) The visual systems of animals 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.not related to the molecular motion
(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.out of scope. the surface area doesn't play any role
(E) Molecules of rhodopsin are the only pigment molecules that occur naturally in the retina.not related to the molecular motion


Here the conclusion is the molecular motion of rhodopsin is directly proportional to the temperature of the retina.
In B the visual system of the animals is more error prone in hot temp than in cold temp. which means as the temp increases the molecular motion of rhodopsin also increases which in turn causing the visual error.

This one supports to the information provided above. So B is correct
Intern
Intern
avatar
Joined: 05 Oct 2013
Posts: 21
GMAT 1: 650 Q49 V30
Light is registered in the retina when photons hit molecules  [#permalink]

Show Tags

New post Updated on: 27 Jul 2018, 10:28
1
9
Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photons of light, rhydopsin 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 one 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 animals 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.

Hi Everyone

I have a doubt a read it in the MGMAT guides that for must be true questions an answer choice that introduces new information is considered wrong.
Then why in this question the correct answer is B and not C where in the stimulus have they mentioned animals?? :shock: :shock:

Can anyone please explain...

Originally posted by amyjohn on 17 Feb 2014, 21:51.
Last edited by Bunuel on 27 Jul 2018, 10:28, edited 2 times in total.
formatted
Manager
Manager
avatar
Joined: 14 Dec 2011
Posts: 205
GPA: 3.46
WE: Information Technology (Consulting)
Premium Member
Re: Light is registered in the retina when  [#permalink]

Show Tags

New post 18 Feb 2014, 00:05
We can't really deduce C as it says that As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons while stem says that The amount of this molecular motion is directly proportional to the temperature of the retina. To me, I inferred this as -as temperature of the retina rises, rhodopsin molecules' motion will increase.

But at the same time B also doesn't look good either as it says that The visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones. The stem never mentions that temperature of the retina will be same as that of body. In a way, we might apply common sense here but not sure if we can have this common sense assumption which is never stated or rephrased in the stem. Moreover, as you mentioned the stem never says anything about animals specifically.

Would like expert inputs here!! Will be helpful :-)
Manager
Manager
avatar
Joined: 25 Apr 2014
Posts: 122
Re: Light is registered in the retina when  [#permalink]

Show Tags

New post 28 Aug 2014, 23:50
1
amyjohn wrote:
Hi Everyone

I have a doubt a read it in the MGMAT guides that for must be true questions an answer choice that introduces new information is considered wrong.
Then why in this question the correct answer is B and not C where in the stimulus have they mentioned animals?? :shock: :shock:

Can anyone please explain..

Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photons of light, rhydopsin 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 one 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 animals 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.


Hi guys,
Lemme try to attempt this one! I marked B though ( I agree that "animal" threw me also off)

A .The temperature of an animal's retina depends on the amount of light the retina is absorbing. -- Nowhere does it states that about the amount of light that gets absorbed. It just talks about the light photons being hit. INCORRECT

B. The visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones. - Assume that a particular animal lives in hot surroundings and itself has high body temperature and therefore "high retina temperature"(retina being a part of body) too. Now, higher the temp of retina, higher the molecular motion(something that is stated in the stimulus). Vice-versa can be sad about cold temperatures. MAKES SENSE.

C) As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons. -- Reaction was never talked about. INCORRECT

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.--Surface areas was never talked about. INCORRECT

E) Molecules of rhodopsin are the only pigment molecules that occur naturally in the retina. --- Only pigment? No one said that ! INCORRECT

Let me know if it helped!
Intern
Intern
avatar
Joined: 04 Sep 2014
Posts: 9
Re: Light is registered in the retina when  [#permalink]

Show Tags

New post 29 Dec 2015, 02:28
First of all People should stop worrying about this CR, because this CR comes under the LSAT in MGMAT.
There is a lot of structural and analytical difference between the LSAT and GMAT questions.
So please move on.
Manhattan Prep Instructor
User avatar
S
Joined: 22 Mar 2011
Posts: 1302
Re: Light is registered in the retina when  [#permalink]

Show Tags

New post 29 Dec 2015, 04:03
MrSobe17, notice that the question just asks us for a "strongly supported" conclusion. This will usually be a pretty solid inference, but some small uncertainty can remain. Here, we do have to know that the retina doesn't somehow stay low even as the animal's body temperature rises with its surroundings. However, since the retina is part of the animal's body, this is not a really glaring problem.

Yes, this is an LSAT question, but it's still a high-quality question, and we could see something quite a bit like this on the GMAT. Here's an example of an official GMAT question that requires us to make a bit of an assumption to reach the correct answer: although-aspirin-has-been-proven-to-eliminate-moderate-fever-45670.html
_________________


Dmitry Farber | Manhattan GMAT Instructor | New York


Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews

Senior Manager
Senior Manager
User avatar
G
Joined: 04 Feb 2014
Posts: 256
Location: India
Concentration: General Management, Entrepreneurship
GPA: 3
WE: Project Management (Manufacturing)
GMAT ToolKit User
Re: Light is registered in the retina when photons hit molecules  [#permalink]

Show Tags

New post 29 Jul 2017, 19:52
There is no conclusion in the argument. So this is a MBT question. The correct ans choice will be the one that can be inferred from the argument.

golfpro20050 wrote:
Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules’ shape. Even when they have not been struck by photons 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 one 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. Can't be inferred
(B) The visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones. Makes sense
(C) As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons. Can't be inferred
(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.Can't be inferred
(E) Molecules of rhodopsin are the only pigment molecules that occur naturally in the retina.Can't be inferred

Source :Lsat

_________________

Kudos if you like my post

VP
VP
User avatar
V
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1264
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Premium Member Reviews Badge CAT Tests
Re: Light is registered in the retina when  [#permalink]

Show Tags

New post 11 Apr 2018, 23:47
Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photons of light, rhydopsin 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 one of the following conclusions is most strongly supported by the information above?[/quote]

The mistake one can do in this question is rejecting the answer choice on the basis of word "animal" . The same I did.
But if you read closely and completely, only (B) makes sense. All others are either extreme or not supported by the passage.

A) The temperature of an animal's retina depends on the amount of light the retina is absorbing.

B) The visual systems of animals 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.

It's (B)
_________________

"Do not watch clock; Do what it does. KEEP GOING."

Intern
Intern
avatar
B
Joined: 13 May 2017
Posts: 18
Reviews Badge
Re: Light is registered in the retina when  [#permalink]

Show Tags

New post 27 Jul 2018, 09:06
in solving CR first thing to look out for is the conclusion . The amount of molecular motion is directly proportional to the temperature of the retina.
Analysis - more the temperature more the movement and more the disturbance in seeing .
lets' look into the option .


A) The temperature of an animal's retina depends on the amount of light the retina is absorbing.- no where it's mentioned how the temperature is linked to light.

B) The visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones. - option is presented as a trap as indirect correlation is presented of temperature.
we can keep this option as it matches our analysis.

C) As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons. - no where its mentioned.

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? - nothing is given in argument regarding size of surface area.

E) Molecules of rhodopsin are the only pigment molecules that occur naturally in the retina.
- extreme option as only is used so it can be rejected.

hence B is the answer as it matches our analysis.
GMAT Club Bot
Re: Light is registered in the retina when &nbs [#permalink] 27 Jul 2018, 09:06
Display posts from previous: Sort by

Light is registered in the retina when photons hit molecules

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.