antigenic shift

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 126
Joined: Sat Sep 26, 2009 5:41 pm
Location: Chennai
Thanked: 4 times
Followed by:2 members
GMAT Score:660

antigenic shift

by vivek1110 » Tue Apr 13, 2010 5:35 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

[spoiler]Can someone please explain why E is wrong?

OA A[/spoiler]
Is caught between a rock and a hard place!

Master | Next Rank: 500 Posts
Posts: 182
Joined: Mon Apr 20, 2009 7:09 pm
Thanked: 1 times
Followed by:1 members

by akahuja143 » Tue Apr 13, 2010 5:45 am
IMO A

E does not have parallel structure

User avatar
GMAT Instructor
Posts: 613
Joined: Thu Mar 22, 2007 6:17 am
Location: madrid
Thanked: 171 times
Followed by:64 members
GMAT Score:790

by kevincanspain » Tue Apr 13, 2010 5:54 am
Also, remember that after a semicolon, a complete sentence is needed!!!
Kevin Armstrong
GMAT Instructor
Gmatclasses
Madrid

User avatar
Master | Next Rank: 500 Posts
Posts: 278
Joined: Sun Jul 26, 2009 1:17 pm
Location: Bangalore,India
Thanked: 17 times

by loveusonu » Tue Apr 13, 2010 6:09 am
I have seen the structures " ; however, NOUN..." OR "influenza; in contrast, antigenic drift" etc preferable over "; clause"

Is this correct, if yes..Why so?
Sonu
--------
When you want something desperately, the whole Universe conspires in helping to give it to you - The Alchemist

Master | Next Rank: 500 Posts
Posts: 126
Joined: Sat Sep 26, 2009 5:41 pm
Location: Chennai
Thanked: 4 times
Followed by:2 members
GMAT Score:660

by vivek1110 » Tue Apr 13, 2010 6:17 am
kevincanspain wrote:Also, remember that after a semicolon, a complete sentence is needed!!!
How does a sentence that begins with "in contrast" count as a complete sentence? In general, after the semicolon, you've got to have a sentence that can stand on its own.

Or am I mistaken?
Is caught between a rock and a hard place!

Master | Next Rank: 500 Posts
Posts: 305
Joined: Mon Jul 27, 2009 5:38 am
Thanked: 10 times

by Shawshank » Tue Apr 13, 2010 8:53 am
vivek1110 wrote:
kevincanspain wrote:Also, remember that after a semicolon, a complete sentence is needed!!!
How does a sentence that begins with "in contrast" count as a complete sentence? In general, after the semicolon, you've got to have a sentence that can stand on its own.

Or am I mistaken?
The sentence is able to stand on its own. There is no rule which states that sentence beginining with "In contrast" cannot stand on it own.
++++++++++++++++++++++++++++++
Shawshank Redemtion -- Hope is still alive ...

User avatar
GMAT Instructor
Posts: 613
Joined: Thu Mar 22, 2007 6:17 am
Location: madrid
Thanked: 171 times
Followed by:64 members
GMAT Score:790

by kevincanspain » Tue Apr 13, 2010 9:35 am
Kevin likes fish. In contrast, Lana can't stand the sight of anything that has once been in the sea.


Here we have two complete sentences. True, the second sentence makes no sense without the first, as there must be a contrast
Kevin Armstrong
GMAT Instructor
Gmatclasses
Madrid

Master | Next Rank: 500 Posts
Posts: 126
Joined: Sat Sep 26, 2009 5:41 pm
Location: Chennai
Thanked: 4 times
Followed by:2 members
GMAT Score:660

by vivek1110 » Tue Apr 13, 2010 10:47 pm
kevincanspain wrote:
Here we have two complete sentences. True, the second sentence makes no sense without the first, as there must be a contrast
I was of the opinion that, the second sentence should not be able to depend on the second sentence; I didn't know it could.
Thanks for clearing that up :)
Is caught between a rock and a hard place!