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

 It is currently 11 Dec 2018, 14:33

### 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

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### Free GMAT Prep Hour

December 11, 2018

December 11, 2018

09:00 PM EST

10:00 PM EST

Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST.
• ### The winning strategy for 700+ on the GMAT

December 13, 2018

December 13, 2018

08:00 AM PST

09:00 AM PST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

# It is often difficult to differentiate between different enantiomers,

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

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51100
It is often difficult to differentiate between different enantiomers,  [#permalink]

### Show Tags

19 Jul 2018, 20:29
00:00

Difficulty:

15% (low)

Question Stats:

86% (01:48) correct 14% (01:39) wrong based on 65 sessions

### HideShow timer Statistics

Which of the following most logically completes the argument?

It is often difficult to differentiate between different enantiomers, molecules with the same chemical formula that are mirror images of one another, with traditional tests. Since enantiomers of certain types of drugs can cause major health problems, some drug manufacturers have created processes that ensure that only the correct form of the drug is produced in order to avoid exposing consumers to harmful enantiomers. However, while such processes do prevent harmful enantiomers from being created during the drug creation process, these processes do not prevent harm from some drug enantiomers since _____.

A. the metabolism of some drugs within the body can create harmful enantiomers regardless of whether the drug itself contains those enantiomers.

B. not all drug enantiomers are harmful and some can even be helpful in fighting certain diseases.

C. many enantiomers only cause minor side effects rather than major health problems when ingested.

D. the creation of harmful enantiomers are not the only side effect that drug manufacturers should seek to reduce.

E. enantiomers are difficult to detect and cannot be pinpointed as the cause of some health problems.

_________________
Verbal Forum Moderator
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2125
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
Re: It is often difficult to differentiate between different enantiomers,  [#permalink]

### Show Tags

19 Jul 2018, 21:16
Which of the following most logically completes the argument?

It is often difficult to differentiate between different enantiomers, molecules with the same chemical formula that are mirror images of one another, with traditional tests. Since enantiomers of certain types of drugs can cause major health problems, some drug manufacturers have created processes that ensure that only the correct form of the drug is produced in order to avoid exposing consumers to harmful enantiomers. However, while such processes do prevent harmful enantiomers from being created during the drug creation process, these processes do not prevent harm from some drug enantiomers since _____.

A. the metabolism of some drugs within the body can create harmful enantiomers regardless of whether the drug itself contains those enantiomers. - Correct - though the drug itself is not an enantiomer but its' metabolism can create harmful enantiomers

B. not all drug enantiomers are harmful and some can even be helpful in fighting certain diseases. -- Incorrect - we need to explain how inspite of harmful enantiomers not being created in drug creation process, these processes DONOT preven harm from some drug enantiomers

C. many enantiomers only cause minor side effects rather than major health problems when ingested. -- Irrelevant

D. the creation of harmful enantiomers are not the only side effect that drug manufacturers should seek to reduce. -- Incorrect

E. enantiomers are difficult to detect and cannot be pinpointed as the cause of some health problems. -- Incorrect

Answer A
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Intern
Joined: 27 Feb 2018
Posts: 36
Location: India
WE: Engineering (Real Estate)
It is often difficult to differentiate between different enantiomers,  [#permalink]

### Show Tags

19 Jul 2018, 21:30
Bunuel wrote:
Which of the following most logically completes the argument?

It is often difficult to differentiate between different enantiomers, molecules with the same chemical formula that are mirror images of one another, with traditional tests. Since enantiomers of certain types of drugs can cause major health problems, some drug manufacturers have created processes that ensure that only the correct form of the drug is produced in order to avoid exposing consumers to harmful enantiomers. However, while such processes do prevent harmful enantiomers from being created during the drug creation process, these processes do not prevent harm from some drug enantiomers since _____.

A. the metabolism of some drugs within the body can create harmful enantiomers regardless of whether the drug itself contains those enantiomers.

B. not all drug enantiomers are harmful and some can even be helpful in fighting certain diseases.

C. many enantiomers only cause minor side effects rather than major health problems when ingested.

D. the creation of harmful enantiomers are not the only side effect that drug manufacturers should seek to reduce.

E. enantiomers are difficult to detect and cannot be pinpointed as the cause of some health problems.

The Conclusion here is that Drug Companies have created processes which enable them to isolate the required enantiomers only, so unwanted enantiomers are removed., yet the Drug companies claim some harm due to enantiomers may occur, which means enantiomers are formed by virtue of body's metabolism, on which the drug companies have no control. Option A explains the reason why
Math Expert
Joined: 02 Sep 2009
Posts: 51100
Re: It is often difficult to differentiate between different enantiomers,  [#permalink]

### Show Tags

22 Jul 2018, 08:24
Bunuel wrote:
Which of the following most logically completes the argument?

It is often difficult to differentiate between different enantiomers, molecules with the same chemical formula that are mirror images of one another, with traditional tests. Since enantiomers of certain types of drugs can cause major health problems, some drug manufacturers have created processes that ensure that only the correct form of the drug is produced in order to avoid exposing consumers to harmful enantiomers. However, while such processes do prevent harmful enantiomers from being created during the drug creation process, these processes do not prevent harm from some drug enantiomers since _____.

A. the metabolism of some drugs within the body can create harmful enantiomers regardless of whether the drug itself contains those enantiomers.

B. not all drug enantiomers are harmful and some can even be helpful in fighting certain diseases.

C. many enantiomers only cause minor side effects rather than major health problems when ingested.

D. the creation of harmful enantiomers are not the only side effect that drug manufacturers should seek to reduce.

E. enantiomers are difficult to detect and cannot be pinpointed as the cause of some health problems.

VERITAS PREP OFFICIAL SOLUTION:

Whenever you are asked for an answer that "most logically completes" an argument, you can determine what type of question you're dealing with by looking immediately before the blank that the answer will fill in. Here that blank is preceded by "since," so you're looking for a reason, and before that it's "these processes do not prevent harm from some drug enantiomers." So you're looking to provide a reason that these processes don't prevent harm - you're looking to strengthen that idea.

In any strengthen/weaken problem it is extremely helpful to notice the gap in logic between the premises and conclusion, and here the "extra" information just before the conclusion gives you great insight into that. Notice the modifier "during the drug creation process" - that gives a good deal of specificity as to where the prevention of harm takes place. It limits the prevention of enantiomers to that narrow scope "during the drug creation process," leaving enantiomers to emerge during any other time period (during transport of the drugs, the drugs' interaction with their containers, when taken in combination with other drugs or foods, etc.). If you notice that, you can scan the answer choices looking for some other timeframe when these enantiomers emerge.

Choice (A) gives you exactly such a situation where this could happen. If the metabolism of the drugs leads to the creation of the harmful enantiomers, then there is no way that changes in the production process can mitigate the effects of harmful enantiomers. Choice (A) exploits that gap in logic and is correct.

Among the other answers, choice (B) can be eliminated because the argument is about exposure to harmful enantiomers, not whether all enantiomers are necessarily bad. Choice (C) can be eliminated because the argument is about limiting consumer exposure to all harmful enantiomers regardless of severity. Choice (D) can be eliminated because the argument is only about enantiomers, not other side effects, and choice (E) can be eliminated because it does not deal with whether it is possible to limit consumer exposure to harmful enantiomers.
_________________
Re: It is often difficult to differentiate between different enantiomers, &nbs [#permalink] 22 Jul 2018, 08:24
Display posts from previous: Sort by

# It is often difficult to differentiate between different enantiomers,

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

 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®.