BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Antigenic shift refers to

Expert replies
Post new topic Locked
Previous Topic Next Topic
Legendary Member
Posts: 544
Joined: Mon Dec 27, 2010 8:10 amFollowed by: 2 members
Thanked: 45 times
by sameerballani » Mon Jun 06, 2011 8:46 am
Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza.
A)influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza
B)influenza, different than the natural mutation of a single strain, known as antigenic drift
C)influenza, in contrast to the natural mutation of a single strain, known as antigenic drift
D)influenza, different than antigenic drift, which refers to the natural mutation of a single strain of influenza
E)influenza; in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

OA:A
Please comment whether the following additional option is correct or not.

F)influenza, in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

Thanks
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Sentence Correction |
User avatar
Legendary Member
Posts: 979
Joined: Tue Apr 14, 2009 1:38 amFollowed by: 12 members
Location: Hyderabad, India
Thanked: 49 times
GMAT Score:700

by bubbliiiiiiii » Mon Jun 06, 2011 8:53 am
Whats wrong with D?
Regards,

Pranay
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 1309
Joined: Mon Apr 04, 2011 5:34 amFollowed by: 123 members
Location: India
Thanked: 310 times
GMAT Score:750

by cans » Mon Jun 06, 2011 8:53 am
use of ';' means the second half should be complete and related to first half
IMO A
If my post helped you- let me know by pushing the thanks button ;)

Contact me about long distance tutoring!
[email protected]

Cans!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 199
Joined: Mon Apr 06, 2009 4:15 am
Location: India
Thanked: 13 times

by gauravgundal » Mon Jun 06, 2011 8:58 am
Initally I got down to E,but after analyzing careful I found E a wrong answer choice.
IMO: A

The part after and before semicolon must be an independent clause/sentence.

B. Comparison issue.
C. same as B.
D. different than is incorrect .It should be different from or better to say.. Antigenic shift refers... and is different from antigenic drift.
E. As stated above ,the part after semicolon in E is not a clause/sentence.
...which refers... modifies antigenice drift.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1574
Joined: Fri Jan 28, 2011 2:52 amFollowed by: 13 members
Thanked: 88 times

by aspirant2011 » Mon Jun 06, 2011 9:01 am
bubbliiiiiiii wrote:Whats wrong with D?
different than is the wrong idiom, correct idiom is different from
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1448
Joined: Tue May 17, 2011 9:55 amFollowed by: 53 members
Location: India
Thanked: 375 times

by Frankenstein » Mon Jun 06, 2011 9:16 am
sameerballani wrote:Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza.

Please comment whether the following additional option is correct or not.

F)influenza, in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

Thanks
Hi,
I think F is incorrect too. I think the usage of 'in contrast to ...' in F implies that antigenic shift is compared with influenza(noun)/two different strains of influenza(noun phrase). But, the purpose of the sentence is to show contrast between Antigenic shift and Antigenic drift.
Cheers!

Things are not what they appear to be... nor are they otherwise
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 544
Joined: Mon Dec 27, 2010 8:10 amFollowed by: 2 members
Thanked: 45 times

by sameerballani » Mon Jun 06, 2011 10:51 am
Frankenstein wrote:
sameerballani wrote:Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza.

Please comment whether the following additional option is correct or not.

F)influenza, in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

Thanks
Hi,
I think F is incorrect too. I think the usage of 'in contrast to ...' in F implies that antigenic shift is compared with influenza(noun)/two different strains of influenza(noun phrase). But, the purpose of the sentence is to show contrast between Antigenic shift and Antigenic drift.
However, I feel the comparison is between Antigenic shift and Antigenic drift only.
That is why i created this additional option. Are you sure about your comment?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1448
Joined: Tue May 17, 2011 9:55 amFollowed by: 53 members
Location: India
Thanked: 375 times

by Frankenstein » Mon Jun 06, 2011 11:12 am
sameerballani wrote:
Frankenstein wrote:
sameerballani wrote:Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza.

Please comment whether the following additional option is correct or not.

F)influenza, in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

Thanks
Hi,
I think F is incorrect too. I think the usage of 'in contrast to ...' in F implies that antigenic shift is compared with influenza(noun)/two different strains of influenza(noun phrase). But, the purpose of the sentence is to show contrast between Antigenic shift and Antigenic drift.
However, I feel the comparison is between Antigenic shift and Antigenic drift only.
That is why i created this additional option. Are you sure about your comment?
Hi,
On first look, that appeared OK even to me. I cant assure you. If I were sure, I wouldn't use 'I think'. It's just my opinion. It would be great if experts can respond.
Cheers!

Things are not what they appear to be... nor are they otherwise
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Tue Jun 07, 2011 8:28 am
sameerballani wrote:Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza.
A)influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza
B)influenza, different than the natural mutation of a single strain, known as antigenic drift
C)influenza, in contrast to the natural mutation of a single strain, known as antigenic drift
D)influenza, different than antigenic drift, which refers to the natural mutation of a single strain of influenza
E)influenza; in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

OA:A
Please comment whether the following additional option is correct or not.

F)influenza, in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza

Thanks
In F, it is unclear what exactly is in contrast to antigenic drift. It must be clear what a modifier is modifying. Thus, F would be incorrect if it were offered as an answer choice.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Locked
• Page 1 of 1