Find all School-related info fast with the new School-Specific MBA Forum

It is currently 25 Oct 2014, 18:07


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.

for You

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

Your Progress

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


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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Among the several hundred million cells that comprise the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
1 KUDOS received
Joined: 28 Mar 2011
Posts: 34
Followers: 0

Kudos [?]: 1 [1] , given: 0

Among the several hundred million cells that comprise the [#permalink] New post 12 May 2011, 03:22
This post received
Among the several hundred million cells that comprise the wondrously complex
human body, and thus to be theoretically detectable in lab tests and in
electron photomicrographs, a tiny fraction, no more than a few hundred, belong
to a curious subclass whose luminescence has a wavelength distribution so unique that
5 it long defied explanation. Such systems luminisce strongly in the visible region of the
spectrum, but some of them do so even more strongly at both shorter and longer
wavelengths: in the ultraviolet region and in the infrared regions.
10 This odd distribution of luminescence is best explained by the pairing
of a giant red blood cell and an intensely small white blood cell that is virtually
in contact with its larger companion as the two travel around a common center.
Such objects have become known as Clinging cells. On photographic plates
only the giant cell can be discerned, but evidence for the existence of the
15 tiny companion has now been supplied by magnifying instruments capable
of detecting ultraviolet luminescence at wavelengths that are absorbed by the body's
heat and therefore cannot be detected by typical analytical instruments.
The spectra of Clinging cells indicate that the giant red blood cell is surrounded by
20 very thin lipid filaments. The existence of the lipid filaments marked such objects as
being unique several decades before clinical observations finally identified the
lipid as the luminescence from the tiny companion white blood cell. Clinging cells
also flare up in outbursts indicating the ejection of material in the form of a shell
or a ring, reminiscent of the recurrent circulation of hormonal cells. Clinging cells may
25 therefore represent a transitory phase in the evolution of certain types of hormonal
systems in which there is a substantial transfer of matter from the larger partner
to the smaller.
The exact evolutionary course that turns a typical blood cell system into a clinging one is
30 a matter of conjecture. The comparatively small number of known Clinging cells
in our bodies suggests that if all binaries of modest mass normally pass through
a clinging phase in their evolution, the phase must be extremely brief, perhaps
as short as a millisecond.

1. The author's primary purpose in the passage is to
(A) demonstrate that most hormonal systems were at one time clinging
(B) dismiss current knowledge of Clinging cells as overly speculative
(C) describe Clinging cells as a distinct type of cell system
(D) present evidence that hormonal systems are formed from tiny white blood cells
(E) compare characteristics of giant red blood cells and tiny white blood cells

2. The passage implies that Clinging cell systems differ from other hormonal systems in that the former

(A) display luminescence patterns different from those of most hormonal systems
(B) contain two cells that revolve around a common center
(C) possess far greater mass than other hormonal systems
(D) are more common in our bodies than other hormonal systems
(E) are the only hormonal systems that can be detected by electron microscopes

3. Which of the following can be inferred from the passage about "the luminescence" mentioned in line 22?

(A) It causes certain large red blood cells to appear tiny to observers.
(B) It was incorrectly associated with hormonal cells in our bodies.
(C) It interferes with the clarity of photographs of most hormonal systems.
(D) It corresponds to the visible region of the light spectrum.
(E) It could not be positively identified from photomicrograph observations.

4. According to the passage, the exchange of matter within a Clinging cell system is believed to be a process in which

(A) cell grows in mass at the expense of the other
(B) the mass of each cell remains fairly stable
(C) the mass of both cells declines
(D) both cells absorb matter emitted by other nearby cells
(E) both cells gradually return to an earlier singular state

5. The assumption that the Clinging cell phase in the evolution of some hormonal systems "must be extremely brief " (line ) is most likely based on the fact that

(A) hormones are rapidly ejected from clinging systems
(B) few Clinging cells have been detected in our bodies
(C) the cells in a clinging pair are in close proximity to each other
(D) Clinging cells vary considerably in size from one another
(E) the outbursts of Clinging cells resemble those of hormonal cells

I will post the answers after some discussion...

Joined: 11 Apr 2011
Posts: 109
Followers: 0

Kudos [?]: 23 [0], given: 16

Re: RC clinging cells [#permalink] New post 13 May 2011, 09:31
1. c
2. a
3. d
4. a
5. b
User avatar
Status: Still Struggling
Joined: 02 Nov 2010
Posts: 139
Location: India
GMAT Date: 10-15-2011
GPA: 3.71
WE: Information Technology (Computer Software)
Followers: 5

Kudos [?]: 20 [0], given: 8

Re: RC clinging cells [#permalink] New post 24 May 2011, 22:09


Time taken : 06:12
OA pls....

Appreciation in KUDOS please!
Knewton Free Test 10/03 - 710 (49/37)
Princeton Free Test 10/08 - 610 (44/31)
Kaplan Test 1- 10/10 - 630
Veritas Prep- 10/11 - 630 (42/37)
MGMAT 1 - 10/12 - 680 (45/34)

Joined: 16 Nov 2010
Posts: 1691
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 31

Kudos [?]: 299 [0], given: 36

Premium Member Reviews Badge
Re: RC clinging cells [#permalink] New post 25 May 2011, 06:04
7 min.

1 - C
2 - A
3 - E
4 - A
5 - B

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Re: RC clinging cells   [#permalink] 25 May 2011, 06:04
    Similar topics Author Replies Last post
6 Five hundred million different species of living creatures ricokevin 13 12 Apr 2007, 18:01
Five hundred million different species of living creatures GMAThopeful 4 26 Mar 2007, 09:14
Five hundred million different species of living creatures jerrywu 7 15 Aug 2006, 10:14
6 Experts publish their posts in the topic Five hundred million different species of living creatures nocilis 97 25 Mar 2005, 20:28
Five hundred million different species of living creatures chunjuwu 20 25 Dec 2004, 00:11
Display posts from previous: Sort by

Among the several hundred million cells that comprise the

  Question banks Downloads My Bookmarks Reviews Important topics  

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

Powered by phpBB © phpBB Group and phpBB SEO

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®.