It was once believed that cells

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsMust be False

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Stimulus

It was once believed that cells grown in laboratory tissue cultures were essentially immortal. That is, as long as all of their needs were met, they would continue dividing forever. However, it has been shown that normal cells have a finite reproductive limit. A human liver cell, for example, divides 60 times “remembers” where it stopped dividing. After thawing, it divides another 30 times—but no more.

What this question is testing

Must be False

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question

If the information above is accurate, a liver cell in which more than 60 divisions took place in a tissue culture cannot be which

Answer choices

Trap6% picked this
an abnormal human liver
6%
Correct85% picked this
a normal human liver cell that had been frozen after its first division
Why this is right
Answer B is correct.
Skill tested: Must be False · how this choice captures the argument's function is the move to repeat next time.
85%
Trap3% picked this
a normal cell that came from the liver of an individual of a nonhuman species and
3%
Trap2% picked this
a normal liver cell that came from an individual of a nonhuman species and had been frozen after its
2%
Trap4% picked this
an abnormal cell from the liver of an individual of a
4%

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