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# Viruses

Author Message
Manager
Joined: 22 Apr 2004
Posts: 156

Kudos [?]: 110 [0], given: 0

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03 Oct 2005, 09:17
Viruses can have beneficial effects. For example, some kill more complex microorganisms, some of which are deadly to humans. But viruses have such simple structures that replacing just a few of the beneficial virus' several million atoms can make it deadly to humans. Clearly, since alterations of greater complexity than this are commonly produced by random mutations, any virus could easily become dangerous to humans.

If the statements above are true, each of the below statements could be true except:
(a) random mutation makes some deadly viruses beneficial to humans
(b) some organisms of greater complexity than viruses are no more likely than viruses to undergo significant alterations through random mutations
(c) some microorganisms that are more complex than viruses are beneficial to humans
(d) some viruses that fail to kill other viruses that are deadly to humans are beneficial to humans
(e) no virus that is deadly to organisms of greater complexity than itself is beneficial to humans

Kudos [?]: 110 [0], given: 0

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5034

Kudos [?]: 438 [0], given: 0

Location: Singapore

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05 Oct 2005, 01:29
A could be good. The relationship stated in choice A could not be arrived at based on the passage.

Kudos [?]: 438 [0], given: 0

Manager
Joined: 21 Sep 2005
Posts: 231

Kudos [?]: 3 [0], given: 0

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05 Oct 2005, 02:25
go E go....

Kudos [?]: 3 [0], given: 0

Senior Manager
Joined: 15 Apr 2005
Posts: 414

Kudos [?]: 17 [0], given: 0

Location: India, Chennai

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05 Oct 2005, 02:32
My choice is also A.

Kudos [?]: 17 [0], given: 0

Manager
Joined: 22 Apr 2004
Posts: 156

Kudos [?]: 110 [0], given: 0

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08 Oct 2005, 07:02
OA is E.

E is false as it directly contradicts the statement that viruses can kill more complex microorgs and therefore benefit humans.

Why is A incorrect? Is it because it is not directly mentioned in the passage and therefore could be true?

Kudos [?]: 110 [0], given: 0

08 Oct 2005, 07:02
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