LSAT 131 – Section 3 – Question 03

LSAT 131 - Section 3 - Question 03

December 2009

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT131 S3 Q03
+LR
Most strongly supported +MSS
A
4%
158
B
1%
151
C
91%
165
D
0%
156
E
4%
157
129
140
150
 +Easier 146.026 +SubsectionMedium

Hemoglobin, a substance in human blood, transports oxygen from the lungs to the rest of the body. With each oxygen molecule it picks up, a hemoglobin molecule becomes more effective at picking up additional oxygen molecules until its maximum capacity of four oxygen molecules is reached. Grabbing an oxygen molecule changes the shape of the hemoglobin molecule, each time causing it literally to open itself to receive more oxygen.

Summary
Hemoglobin transports oxygen from the lungs throughout the body. As it picks up more oxygen molecules, a hemoglobin molecule becomes more effective at picking up additional oxygen molecules until it reaches its capacity of four. Grabbing an oxygen molecule changes the shape of the hemoglobin molecule, making it easier to receive more oxygen.

Strongly Supported Conclusions
A hemoglobin molecule with more oxygen is more effective at picking up oxygen molecules than a hemoglobin molecule with fewer oxygen molecules.

A
A hemoglobin molecule that has picked up three oxygen molecules will probably acquire a fourth oxygen molecule.
This is too strong to support. The stimulus says that it becomes increasingly likely to pick up an additional oxygen molecule but does not state that it is *likely*.
B
The only factor determining how effective a hemoglobin molecule is at picking up oxygen molecules is how open the shape of that hemoglobin molecule is.
This is too strong to support. The stimulus says that the shape of a hemoglobin molecule plays *a* factor, not that it is the sole factor.
C
A hemoglobin molecule that has picked up three oxygen molecules will be more effective at picking up another oxygen molecule than will a hemoglobin molecule that has picked up only one oxygen molecule.
This comparative statement is supported because the stimulus says that a hemoglobin molecule becomes increasingly effective at picking up more oxygen molecules the more molecules it already has.
D
A hemoglobin molecule that has picked up four oxygen molecules will have the same shape as a hemoglobin molecule that has not picked up any oxygen molecules.
There is no information about the kind of shape a hemoglobin molecule has.
E
Each hemoglobin molecule in human blood picks up between one and four oxygen molecules in or near the lungs and transports them to some other part of the body.
It is possible that a hemoglobin molecule does not pick up any oxygen molecules. No information specifies that a hemoglobin molecule has to pick up between one and four oxygen molecules.

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LSAT PrepTest 131 Explanations

Section 1 - Logical Reasoning

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Reading Comprehension

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