5

Set 3: Cross-Text Connections

Explanation

Answer: A

PASSAGE

Text 1 Stem cells have the potential to grow into any tissue in the body. They offer hope for curing diseases like Parkinson's and diabetes by replacing damaged cells. Text 2 The use of embryonic stem cells is ethically controversial because obtaining them involves destroying a human embryo. This has led researchers to focus on induced pluripotent stem cells (iPSCs), which are made from adult cells.

Based on the texts, why has research shifted towards iPSCs?

A. To bypass the ethical dilemma associated with embryonic stem cells while retaining therapeutic potential.✓ Correct
B. Because embryonic stem cells do not work.
C. Because adult cells are cheaper.
D. To cure the common cold.

Detailed Explanation

Text 1: Potential/Cure. Text 2: Controversy (Destroy embryo) -> Shift to iPSCs. Reason: Bypass ethics.

Key Evidence:

• "ethically controversial"

• "led researchers to focus on ... iPSCs"

Why others are wrong: B (They work (Text 1).), C (Not mentioned.), D (Not mentioned.).

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